SUNOVA SOLAR Sunova-eFox Series Energy Storage System User Manual

Sunova-eFox Series Energy Storage System

Sunova-eFox Off-Grid Energy Storage System

The Sunova-eFox Off-Grid Energy Storage System is a versatile
system that can connect with solar panels, grid (or generator), and
load. It features a built-in lithium battery, hybrid inverter, and
energy management system. The system offers four working modes: SOL
(Solar first), UEI (Utility first), SBU (Solar-Battery-Utility),
and SUB (Solar-Utility-Battery).

Operation Modes

The system has the following operation modes:

priority.
UEI (Utility first)| Utility grid will provide power to the loads as first
priority.
SBU (Solar-Battery-Utility)| Solar energy provides power to the loads as first priority. If
PV power is less than consumption and battery capacity is low, the
grid supplies power to the load.
SUB (Solar-Utility-Battery)| Solar energy provides power to the loads as first priority. If
PV power is less than consumption and battery capacity is low, the
grid supplies power to the load.

Components

After unpacking the package, please inspect the components based
on the table below:

Sunova-eFox Off-Grid
Energy Storage System
Sunova-eFox-35E Sunova-eFox-50E

User Manual

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VersionEN V2.0

Sunova-eFox Series
Copyright
This user manual’s copyright belongs to original manufacturer. Any unit or individual shall not reproduce or partially reproduce the contents of this manual without permission, and shall not convert or distribute in any form or means. Manufacturer reserves the copyright, and owns the power of interpretation. All information may be changed or updated without notice, please understand.

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Sunova-eFox Series
Preface
Sunova-eFox Series Energy Storage System is a multi-functional power supply device designed to comprehensively use for residential and commercial projects. With built-in lithium battery, this system can provide uninterrupted and stable power supply, and ensure the normal use of the utility when the grid is out. This device can run in the most economical and practical mode based on the user requirement to bring objective economical benefits and not cause any environmental pollution. This user manual mainly introduces the operation, installation and specificationof the device. Please read through this user manual before install and operate the system. Please keep this user manual for future use.

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Sunova-eFox Series
Table of Contents
1. Introduction ···························································································································04 1.1 Application·························································································································04 1.2 Components······················································································································08 1.3 Sunova-eFox Dimension······························································································09 1.4 Quality Inspection ··········································································································10 1.5 Label ·····································································································································10 1.6 Safety ····································································································································09
2. Installation ·······························································································································11 2.1 Device Overview···············································································································11 2.1.1 Device Carrying ······································································································11 2.1.2 Unboxing Guide······································································································12 2.1.3 Installation ················································································································15 2.2 Electric Installation···········································································································17 2.2.1 Wiring Procedure···································································································17
3. Operation ·································································································································19 3.1 LCD Display·························································································································19 3.2 LCD Display Icons·············································································································20 3.3 LCD Setting·························································································································23 3.4 Display Information·········································································································32 3.5 Operating Mode···············································································································33 3.6 Monitoring··························································································································36
4.Maintenance·····························································································································37 4.1 Fault Code···························································································································37 4.2 Warning Indicator············································································································38 4.3 Specification·······················································································································40 4.4 Trouble shooting··············································································································41 4.5 Activation·····························································································································42

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Sunova-eFox Series
1 Introduction
1.1 Application
Sunova-eFox series can connect with solar panels, grid (or generator), load, it built-in lithium battery, hybrid inverter and energy management system. Sunova-eFox has four working modes: SOL (Solar first), UEI (Utility first), SBU(Solar-Battery-Utility), SUB (Solar-Utility -Battery). These working modes are described refer to the setting part.

Figure 1 Sunova-eFox Working Diagram 1.1.1 Operation Modes

Definition

Battery voltage too low: Lower than the value of setting 12. Battery voltage too high: Higher than the value of setting 13.
Battery PV Panel Utility Grid

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Sunova-eFox Series
When PV power is greater than the consumption, and the battery capacity is low, the PV will supply power to the load and charge the battery at the same time.
SOL (Solar first): Solar energy provides power to the loads as first priority.
When PV power is less than the consumption, and the battery capacity is high,PV and battery suplay power to the load at the same time.

UEI (Utility first): Utility gird will provide power to the loads as first priority.

The grid supplies power to the load and charges the battery when the battery capacity is low.

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Sunova-eFox Series
When PV power is greater than the consumption, and the battery capacity is low, the PV will supply power to the load and charge the battery at the same time.

SBU(Solar-Battery-Utility) : Solar energy provides power to the loads as first priority.

When PV power is less than the consumption, and the battery capacity is high,PV and battery suplay power to the load at the same time.

When PV power is less than the consumption, and the battery capacity is low, grid supplies the load, PV charges the battery, if there is rest PV power, supply the load.

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Sunova-eFox Series
When PV power is greater than the consumption, and the battery capacity is low,PV supplies the load and charge the battery at the same time.

SUB(Solar-Utility -Battery) : Solar energy provides power to the loads as first priority.

When PV power is less than the consumption, and the battery capacity is low, grid supplies power to the load, PV charges the battery, if there is rest PV power, supplies to the load.

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Sunova-eFox Series

1.2 Components

After unpacking the package, please inspect the components based on the below table.
Table 1 Component list

NO.

Pictures

Description

Quantity

1

Sunova-eFox OFF-GRID Energy Storage System

1 pcs

2

WiFi module antenna

1 pcs

3

Tube terminal red

3pcs

4

Tube terminal black

3pcs

5

Tube terminal yellow

2pcs

6

User manual

1 pcs

7

Qualified Certificate

1pcs

8

APP Operation Guide

1 pcs

9

Packing List

1 pcs

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Sunova-eFox Series
1.3 Sunova-eFox Dimension
The size is slightly different according to the type, below for reference.

Figure 2 Sunova-eFox Dimension

1.4 Quality Inspection

Before installation, please confirm that the packaging is unbroken, and after unpacking, check that all parts are consistent with the packaging list and are in good condition.
Table 2 Quality Inspection

Operation Check Package Check Component Check built-in Accessory

Warning No damage No loss or damage No loss or damage

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Sunova-eFox Series
1.5 Label
· Danger: Possibility of fatal voltage
· Warning: Possibility of device damage or personal injury
· Warning: Heat injure
1.6 Safety
This user manual includes safety introduction. Please read this manual carefully before installing, maintaining and operating the equipment. If you do not operate in accordance with this manual, if there is equipment damage or personal injury or death, manufacturer will not be responsible for it.

Must be grounded before operation.
Do not open the cover of the storage unauthorized. The electrical parts and components inside of the storage are electrostatic. Take measurements to avoid electrostatic discharge during relevant operation.
Only qualified electricians are allowed to operate the storage under the permission of local power departments. Ensure reliable installation and electrical connection before operation
Only qualified electricians are allowed to perform the maintenance, inspection, and components replacement of this product.
Do not remove any part and component of the storage unintended; Otherwise, damage to the device and physical injury may occur.

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Sunova-eFox Series
2 Installation
2.1 Device Overview

1 2 3 4
5

6

8

9 7

Inverter Switch Battery Breaker AC Input Breaker

AC Output AC Input PV Input

Figure 3 Device Overview

WiFi Antenna Heat Dissipation Hole LCD Screen

2.1.1 Device Carrying

Warning The device weight (67.6kg) may cause personal injury.
· Please note that the device weight when move or deliver the device. · Select the firm installation platform. · Use proper tools for installation. · At least two people to install.

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Sunova-eFox Series 2.1.2 Unboxing Guide
The iron buckle is sharp, please pay attention to personal safety when unboxing! (1) Use screwdriver to pry off the top cover clasp.
Figure 4 (2) Remove the top cover after prying off all the cover buckles.

Figure 5

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Sunova-eFox Series
(3) After prying off the side cover iron buckle, remove the four side covers.

Figure 6
(4) Take out the machine; the machine is heavy, please pay attention.
Warning Ensure the installed place be well ventilate and conform to device using condition. No flammable and combustible objects are allowed to put within 4m. The environmental temperature shall keep between 0 and 40.
Warning No smoking and setting off fireworks nearby. Ensure clean and ventilate in the surrounding area. Ensure the wiring conform to requirement to avoid fire.

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Sunova-eFox Series

Adequate ventilation of the room or location in which the device containing vented or valve-regulated batteries is located, to prevent the accumulation of hazardous gases;
-Servicing of batteries should be performed or supervised by personnel knowledgeable about batteries and the required precautions. -When replacing batteries, replace with the same type and number of batteries or battery packs. -CAUTION: Do not dispose of batteries in a fire. The batteries may explode. -CAUTION: Do not open or damage batteries. Released electrolyte is harmful to the skin and eyes. It may be toxic. -CAUTION: A battery can present a risk of electrical shock and high short-circuit current. The following precautions should be observed when working on batteries:
a) Remove watches, rings, or other metal objects. b) Use tools with insulated handles. c) Wear rubber gloves and boots. d) Do not lay tools or metal parts on top of batteries. e) Disconnect charging source prior to connecting or disconnecting battery terminals. f) Determine if battery is inadvertently grounded. If inadvertently grounded, remove source from ground. Contact with any part of a grounded battery can result in electrical shock. The likelihood of such shock can be reduced if such grounds are removed during installation and maintenance (applicable to equipment and remote battery supplies not having a grounded supply circuit). g) Rinse acid splashes thoroughly with clear water for a long time and consider consulting a doctor. -Battery terminals and connectors shall be accessible for maintenance with the correct tools.

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Sunova-eFox Series
All electrical connections must be in accordance with local and national standards. Only with the permission of the utility grid, the storage can be connected to the utility grid. Disconnect the storage from all the external power sources before service! Do not open the enclosure when the storage is working. When the enclosure lid is removed, live components can be touched which can result in death or serious injury due to electric shock. Batteries deliver electric power, resulting in burns or a fire hazard when they are short-circuited, or wrongly installed.
All the AC cables should be equipped with correctly colored cables for distinguishing. Please refer to related standards about the wiring color.
Do not touch live parts until 5 minutes after disconnection from the power sources.
2.1.3 Installation The device shall be indoor installed and vertical placed. The place where it is installed shall be able to ensure the stability and safety of the product.

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Sunova-eFox Series
Figure 7 After installing against the wall, the caster buckle should be locked to prevent sliding.

Figure 8
Other objects around Sunova-eFox should be more than 200mm away from the equipment to ensure good ventilation.

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Sunova-eFox Series

200 Figure 9
2.2 Electric Installation
The Sunova-eFox is ground mounted, shall put on the ground vertically.
2.2.1 Wiring Procedure 1Cut off the circuit breaker of grid and PV . 2Ensure Smart Unit be not carelessly turned on. 3Detach the screws on the side case. 4Remove the side cover case.

Figure 10

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Sunova-eFox Series
(5) wiring refer to the Figure 11-12 (6) Install the cover.
Figure 11

Figure 12

Table 3 Cable Size

Function

Typical Power

Load Grid PV

Sunova-eFox

3kVA/5kVA 3kVA/5kVA 3kVA/5kVA

Cable size 10AWG 10AWG 10AWG

Torque 1.4~1.6Nm 1.4~1.6Nm 1.4~1.6Nm

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Sunova-eFox Series
3 Operation
3.1 LCD Display
The operation and display panel, shown in below chart, is on the front panel of Sunova-eFox. It includes three indicators, four function buttons and a LCD display, indicating the operating status and input/output power information.
LCD Display Status Indicator Charging Indicator Fault Indicator Function Buttons

Figure 13 LED Display

Table 4 LED Indicator

LED Indicator

Messages

Green

Solid On Flashing

Output is powered by utility grid.
Output powered by battery or PV in battery mode.

Green Solid On Battery is fully charged. Flashing Battery is charging.

Solid On Fault occurs in the inverter. Red
Flashing Warning condition occurs in the inverter.

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Sunova-eFox Series

Table 5 Function Button

Function Button

Description

ESC

To exit setting mode

UP

To go to previous selection

DOWN

To go to next selection

ENTER

To confirm the selection in setting mode or enter setting mode

3.2 LCD Display Icons

Figure 14 Display Icons

Table 6 Function Button

Icon AC Input Information

Description

AC input icon

Indicates AC input power, AC input voltage, AC input frequency, AC input current.

Indicates AC power loads by bypass.

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Sunova-eFox Series

Icon PV Input Information
PV input icon

Description

Indicate PV input power, voltage, current, etc. Output Information
Inverter Icon
Indicate output voltage, current, frequency, Inverter temperature. Load Information Load Icon
Indicates power of load, power percentage of load. Indicates overload happened. Indicates short circuit happened. Battery Information Battery Icon

Indicates battery voltage, energy percentage, battery current.
Indicates SLA battery
Indicates Lithium battery Indicates charging source priority: Solar first, Utility first, solar and utility, or only solar

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Sunova-eFox Series

Icon

Description

Other Information

Indicates output source priority: Solar first, Utility first, SBU mode or SUB mode.

Indicates warning code or fault code.

Indicates a warning or a fault is happening. Indicates it is during setting values.

Indicates the alarm is disabled.

Table 7 Battery information

In AC mode, battery icon will present battery capacity

SOC25%

Battery Status

25%SOC50% 50%SOC75%

75%SOC

In AC mode, battery icon will present battery charging status.

Status

Battery SOC SOC25%

LCD Display 4 bars will flash in turns.

Constant current mode/Constant voltage mode

25%SOC50% 50%SOC75%

Bottom bar will be on and the other three bars will flash in turns. Bottom two bars will be on and the other two bars will flash in turns.

75%SOC

Bottom three bars will be on and the top bar will flash in turns.

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Sunova-eFox Series

3.3 LCD Setting

After pressing and holding ENTER button for 3 seconds, unit enter setting mode. Press “UP” or “DOWN” button to select setting programs. Then, press “ENTER” button to confirm the selection or ESC button to exit.

Settings

Communication protocol

36

Choose Li Mode

01

02

03

04

05

Output source priority

Maximum Charging current

AC Input voltage range

Power Saving mode

Battery type setting

50

AC output time

Output voltage

08

49

Utility Charging

time

42

Real time setting

— Second

41

Real time setting

— Minute

40

Real time setting — Hour

39

Real time setting — Date

38

Real time setting — Month

37

Real time setting –Year

Low DC cut-off SOC(Li)/ voltage(AGM/FLD)

Output frequency

09

Maximum Utility Charging current

11

Setting SOC(Li)/

voltage(AGW/FLD)

12

point back to utility source

Setting SOC(Li)/

voltage(AGW/FLD)

13

point back to battery mode

Charger Source

14

priority

Alarm Control

15

Backlight control

16

Overload bypass

Beeps while primary source is interrypted

21

18

17

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Sunova-eFox Series

Table 8 Setting Program

Program

Description

Solar First

Setting option

Solar energy provides power to the loads as

first priority.

If solar energy is not sufficient to power all

connected loads, battery energy will supply

power to the loads at the same time.

Utility grid provides power to the loads only

when any below one condition happens:

-Solar energy is not available

-Battery voltage drops to low-level warning Output source priority selection: voltage or the setting point in program 12.

01 To configure load

power source

Utility First

priority

Utility gird will provide power to the loads as

first priority.

Solar and battery energy will provide power

to the loads only when utility power is not

available.

SBU Priority (Default)

Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, battery energy will supply power to the loads at the same time. Utility grid provides power to the loads only when battery voltage drops to either low-level warning voltage or the setting point in program 12.

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Sunova-eFox Series

Program

Description

Setting option

SUB Priority

Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, solar and utility gird will supply power to the loads at the same time. Battery provides power to the loads only when solar energy is not sufficient and there is no utility.

Appliances (default)
If selected, acceptable AC input voltage range will be within 90280Vac.

03

AC input voltage

UPS

range

If selected, acceptable AC input voltage range

will be within 170280Vac.

Generator

If selected, acceptable AC input voltage range will be within 90280Vac. In this mode, the max charging current is 30A.

Disable (default)

If disabled, no matter connected load is low

Power saving

04

mode

or high, the on/off status of inverter output will not be effected.

enable/disable

Enable

If enabled,the inverter output will be off when connected load is pretty low or not detected.

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Sunova-eFox Series

Program Description

05

Battery type

AGM

Setting option

Flooded
Lithium (Default)
Only suitable when communicated with BMS

User-defined

If “User-Defined” is selected, battery charge voltage and low DC cut-off voltage can be set up in program 19, 20 and 21.

User-defined 2
Suitable when lithium battery without BMS communication If “User-defined 2” is selected, battery charge voltage and low DC cut-off voltage can be set up in program19, 20 and 21. It is recommended to set to the same voltage in program 19 and 20(full charging voltage point of lithium battery). The inverter will stop charging when the battery voltage reaches this setting.

Protocol 1

Protocol 2

RS485 commu-

·

·

nication

36

protocol

· ·

· ·

Protocol 50

Protocol 51

CAN

communication Protocol 52

protocol

·

·

· ·

·

·

Protocol 99

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Sunova-eFox Series

Program Description

Setting option

NOTE 1: When set the battery type as “LI” in program 05, the setting option 12,13,21 will change to display percent. At the “LI” type battery, the maximum charge current can’t be modify by the user. When the communication fail, the inverter will cut off output. If it lost the communication with the battery, you can set the battery type to “USER” for emergency, then contact the installer.

Setting SOC point

back to utility source

12

when selecting “SBU

priority” or “Solar

first” in program 01.

Setting SOC point back to battery mode 13 when selecting “SBU priority” or “Solar first” in program 01.

Default 30% 20%~50% Settable
Default 65% 30%~100% Settable

Low DC cut-off SOC,

21

If “LI” is selected in

program 05,this

program can be set.

Default 10% 5%~30% Settable

NOTE 2: When the inverter is cut-off, it must to charge by solar or utility until the SOC> setting 21+10%the inverter will restart.

Restart Disable

06

Auto restart when

overload occurs

(Default)

Restart Enable

Auto restart when

Restart Disable

07

over temperature

(Default)

occurs

Restart Enable

27

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Sunova-eFox Series

Program Description

Setting option 230V(Default)

220V

08

Output voltage

240V

208V

*This setting is only available when the inverter is in standby mode (Switch off).

60Hz

50Hz(Default)

09

Output frequency

*This setting is only available when the inverter is in standby mode (Switch off).

11

Maximum utility

charging current.

3.5K :Default 30A, 0A~60A Settable 5K :Default 30A, 0A~80A Settable

If this off grid solar inverter is working in Line, Standby or Fault mode, Charger source can be programmed as below:

Solar energy will charge

14

Charger source

priority:

Solar First

battery as first priority. Utility will charge battery only when solar energy is

To configure charger

not available.

source priority

Solar and Utility gird (Default)

Solar energy and utility grid will both charge battery.

Only solar

Solar energy will be the only charger source no matter utility is available or not.

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Sunova-eFox Series

Program Description

15

Alarm Control

Setting option

If this off grid solar inverter is working in Battery mode or Power saving mode, only solar energy can charge battery. Solar energy will charge battery if it’s available and sufficient.

Alarm on (default)

Alarm off

Backlight on(default)

16

Backlight control

Backlight off

17

Beeps while primary

Alarm on (default)

source is interrupted

Alarm off

Bypass Disable

Bypass enable (Default)

18

Overload bypass

Address setting

28

( for expansion)

When enabled, the unit will transfer to line mode if overload occurs in battery mode.
No need to set, keep it default

37

Real time setting—Year

38

Real time setting—Month

Real time

39

setting—Date

40

Real time setting—Hour

41

Real time setting—Minute

42

Real time

setting—Second

Default 2018, Range 2018-2099
Default 01, Range 01-12
Default 01, Range 01-31
Default 00, Range 00-23
Default 00, Range 00-59
Default 00, Range 00-59

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Sunova-eFox Series

Program Description

Setting option

Battery equalization Battery equalization

enable

disable (default)

43

Battery equalization

If “flooded” or “user-Defined” is selected

in program 05, this program cannot be set up.

44

Battery equalization voltage

Default 58.4V, 48.0V-58.4V Settable

Battery equalized

45

time

Default 60Min, 5min-90min Settable

46

Battery equalized

timeout

Default 120Min, 5min-90min Settable

47

Equalization interval

Default 30 days, 5days-90days Settable

Equalization activated Equalization activated

immediately ON

immediately OFF

(default)

Equalization

48

activated

immediately

If equalization function is enabled in program 43, this program can be setup. If “ON” is selected in this program, it’s to activate battery equalization immediately and LCD main page will shows” “. If” OFF “is selected, it will cancel equalization function until next activated equalization time arrives based on program 47 setting. At this time, ” “will not be show in LCD main page.

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Sunova-eFox Series

Program Description

Setting option

0000 (Default)

49

Utility grid

charging time

The time allows utility grid to charge the battery. Use 4 digits to represent the time period, the upper two digits represent the time when utility grid start to charge the battery, setting range is from 00 to 23, and the lower end to charge the battery, setting range is from 00 to 23. (e.g. 2320 represents the time allows utility grid end to charge the battery is from 23:00 to the next day 20:59, and the utility gird charging is prohibited outside for this period).

The time allows inverter to

power the load.

Use 4 digits to represent

0000 (Default)

the time period, the upper two digits represent the

Allow inverter to

time when inverter start to

power the load all day power the load, setting

run.

range is from 00 to 23, and

the lower two digits repre-

sent the time when invert-

er end to power the load,

50

AC output time

setting range is from 00 to

(e.g. 2320 represents the

time allows inverter to

power the load is from

23:00 to the next day

20:59, and the inverter AC

output power is prohibited

outside of this period).

02/19/20/21/22/23/24/43/ 44/45/46/47/48

No need to set, keep it default

31

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Sunova-eFox Series
3.4 Display Information
The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. The selection information is switched as below order: voltage, frequency, current, power, firmware version.

Time (15:20:10 December15,2018)

Figure 15 Display Information

AC input voltage Output Voltage Load Percentage PV input voltage Battery voltage Warning or Fault code
(Default display on screen)

AC input Frequency Output Frequency Load power in VA PV energy sum in KWH Battery percentage Warning or Fault code

Firmware Version CUP1:040-00-b21; CUP2: 041-00-b21

AC input power in watts Inverter temperature Load power in watts PV energy sum in KWH Battery percentage Warning or Fault code

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AC input current Output Current Load Percentage PV input current Battery charging current Warning or Fault code
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Sunova-eFox Series

3.5 Operating Mode

Table 9 Display Information

Setting Information

LCD display

AC input voltage Output Voltage Load Percentage PV input voltage Battery voltage Warning or Fault code
(Default display on screen)

AC input Frequency Output Frequency Load power in VA PV energy sum in KWH Battery percentage Warning or Fault code

AC input current Output Current Load Percentage PV input current Battery charging current Warning or Fault code

AC input power in watts Inverter temperature Load power in watts PV energy sum in KWH Battery percentage Warning or Fault code
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Sunova-eFox Series
Setting Information
Firmware Version CUP1:040-00-b21; CUP2: 041-00-b21
Time ( 15:20:10, December 15, 2018 )

LCD display

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Sunova-eFox Series

Table 10 Operating mode description

Operation mode

Description

LCD display

Standby Mode / Power Saving Mode Note: Standby mode: The inverter is not turned on yet but at this time, the inverter can charge battery without AC output. Power saving mode: If enabled, the output of inverter will be off when connected load.

Charge by utility and Charging by utility PV energy

No output is supplied by the unit but it still can charge batteries.
Charging by PV energy

No charging

Fault Mode Note: * Fault mode: Errors are caused by inside circuit or external reasons such as over temperature, output short circuit and so on.

PV energy and utility can charge batteries

Charge by utility and PV energy
Charging by PV energy

Charging by utility grid
No charging

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Sunova-eFox Series

Operation mode

Description

LCD display

Charging by PV energy

Utility grid Mode

The unit will provide output power from the mains. It can also charge the battery at line mode.

Charging by utility grid

No battery connected

Power from battery and PV power

Battery Mode

The unit will provide output power from battery and PV power

Battery from battery power only

3.6 Monitoring
For data monitoring, please refer to the “APP Operation Guide” manual.

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36

Sunova-eFox Series

4 Maintenance
4.1 Fault Code

Fault Code 01 02 03 04 05 06 07 08 09 11 51 52 53 55 56 57 58 80 81

Fault Event Fan is locked Over temperature Battery voltage is too high Battery voltage is too low Output short circuited Output voltage is too high Overload time out Bus voltage is too high Bus soft start failed Main relay failed Over current or surge Bus voltage is too low Inverter soft start failed Over DC voltage in AC output Battery connection is open Current sensor failed Output voltage is too low
CAN fault Host loss

Icon on

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Sunova-eFox Series

4.2 Warning Indicator

Warning Code
01

Warning Event Fan locked when inverter
is on

02

Over temperature

03

Battery over charged

04

Low battery

07

Overload

10

Output power derating

12

Solar charger stop due to low battery

13

Solar charger stop due to high PV voltage

14

Solar charger stop due

to overload

15

Parallel input utility grid different

16

Parallel input phase error

17 Parallel output phase loss

18

Buck over current

19

Battery disconnect

20

BMS communication error

21

PV power insufficient

22

Parallel forbidden without battery

25

Parallel inverters’ capacity different

33

BMS communication loss

34

Cell over voltage

Audible Alarm

Icon flashing

Beep 3 times every second

Beep once every second

Beep once every second

Beep once every second

Beep once every 0.5 second Beep once every 3 second Beep once every second Beep once every second Beep once every second Beep once every second Beep once every second Beep once every second Beep once every second No beep Beep once every second Beep once every second Beep once every second Beep once every second Beep once every second Beep once every second

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38

Sunova-eFox Series

Warning Code
35

Warning Event Cell under voltage

36

Total over voltage

37

Total under voltage

38

Discharge over voltage

39

Charge over voltage

40 Discharge over temperature

41

Charge over temperature

42

Mosfet over temperature

43

Battery over temperature

44 Battery under temperature

45

System shut down

Audible Alarm Beep once every second

Icon flashing

Beep once every second

Beep once every second Beep once every second

Beep once every second

Beep once every second

Beep once every second Beep once every second Beep once every second

Beep once every second

Beep once every second

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Sunova-eFox Series

4.3 Specification

Model
Battery Rated voltage Voltage range Capacity Max. discharge rate Max. charge rate Battery type AC Output(Backup) Rated power Surge power Rated output voltage Max. output current Rated frequency THDv Output wave Output type AC Input AC input voltage range AC input frequency AC charge current(Battery) PV Input Max. PV power(Recommended) Max. PV voltage MPPT voltage range Max PV charge current(Battery) General Data Range of working temperature Optimal working temperature range Storage temperature Humidity Cooling strategy Weight Dimension [W x H x D] Enclosure protection rating Communication

Sunova-eFox-35E

Sunova-eFox­50E

5.12kWh

51.2V 44.8~57.6V
1C 1C Li-ion (LFP)

5.12kWh

3500W 7000W,5s
16A

220/230/240V
50/60Hz 3% Pure Sine Wave AC Socket×2+Terminals

5000W 10000W,5s
22.7A

30A(0~60A Adjustable)

170~280V 50/60Hz

30A(0~80A Adjustable)

4500W 80A

450V 120~430V

6000W 100A

Charge: 0~50/Discharge: -10~50 20~30

-15~60

5%~95%

Fan

67.6kg

67.6kg

585611230mm

IP20

585611230mm

WiFi/RS485

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Sunova-eFox Series

4.4 Trouble Shooting

Problem

LCD/LED/Buzzer Explanation / Possible cause

What to do

Unit shuts down automatically during start up process.

LCD/LEDs and buzzer will be active The battery voltage is too for 3 seconds and low(<setting in program 5)
then complete off.

1. Re-charge battery. 2. Replace battery.

No response after power on.

No indication.
Input voltage displayed as 0 on the LCD and green LED is flashing.

1. The battery voltage is far too low. 2. Battery polarity connect reversed.

1. Check if batteries and the wiring are connected well. 2. Re-charge battery. 3. Replace battery.

Input protector is tripped

Check if AC breaker is tripped and AC wiring is connected well.

Mains exist but the

unit works in

battery mode.

Green LED is flashing. Insufficient quality of AC power. (Shore or Generator)

1. Check if AC wires are too thin and/or too long. 2. Check if generator (if applied) is working well or if input voltage setting is correct. (UPS appliance)

Green LED is flashing.

Set “Solar First” as the priority of output source.

When the unit is turned on, internal relay is switched on and off repeatedly.

LCD display and LEDs are flashing

Battery is disconnected.

Change output source priority to Utility first.
Check if battery wires are connected well.

Fault code 01

Fault code 05

Buzzer beeps continuously and red LED is on.

Fault code 02

Fan fault

Replace the fan.

Output short circuited.

Check if wiring is connected well and remove abnormal load.

Internal temperature of inverter component is over 100°C.

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Fault code 03

Battery is over-charged.
The battery voltage is too high.

Return to repair center.
Check if spec and quantity of batteries are meet requirements.

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Sunova-eFox Series

Problem
Buzzer beeps continuously and red LED is on.

LCD/LED/Buzzer Fault code 06/58
Fault code 07 Fault code 08/09/53/57

Explanation/Possible cause

What to do

Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac)

1. Reduce the connected load. 2. Return to repair center

Overload error. The inverter is overload 110% and time is up.

Reduce the connected load by switching off some equipment.

Internal components failed. Return to repair center.

Fault code 51 Fault code 52 Fault code 55
Fault code 56

Over current or surge.

Restart the unit, if the

Bus voltage is too low.

error happens again, please return to repair

center. Output voltage is unbalanced.

Battery is not connected well or fuse is burnt.

If the battery is connected well, please return to repair center.

4.5 Activation
If you accidentally discharge the battery capacity to zero and can’t turn it on, you need to activate it by connecting PV or Utility grid to reuse it.

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42

Sunova Solar Technology Co., Ltd
Add: H building, Standard Plant Phase II, Runzhou Road, Huishan District, Wuxi City, Jiangsu Province,P.R.China,214000
E-mail: info@sunova-solar.com Tel: +86 510 8595 9369 Web: www.sunova-solar.com

References

• Solar.com | Get Binding Solar Quotes Online

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