HOMEGRID HG Cube Series Outdoor Energy Storage System Enclosure User Guide

HG Cube Series Outdoor Energy Storage System Enclosure
User Guide

Precautions Before Installation

For more information about this product, please visit the official website: http://www.homegridenergy.com
1.1 Charge and Discharge Warnings

• Only qualified personnel should work on a Li-Ion battery.
• If the battery is to be stored for a long time, it should be recharged to 90% SOC every 6 months.
• Recharge a fully discharged battery within 12 hours.
• Do not connect the battery directly to a solar array. The array must be connected through an inverter.
• Always use the battery modules with the Stack’d BMS.
• If charged after the batter was discharged below the “discharge cut-off voltage”, or when the battery was damaged or overcharged, the battery can release harmful gas.
• The temperature range for battery charging is 0°C to 55°C. Charging the battery at temperatures outside this range may cause damage to the battery or reduce the battery’s life.
• The temperature range for battery discharging is -20°C to 55°C. Discharging the battery at temperatures outside this range may cause damage to the battery or reduce the battery’s life.

1.2 Transportation Warnings

• The battery must be transported in its original or equivalent package and in an upright position. If the battery is in its package, use soft slings to avoid damage.
• Do not stand underneath a battery on any sort of hoist. Keep hands & feet clear.

NOTE:

• Batteries are tested according to UN Handbook of Tests and Criteria, part III, sub section 38.3 (ST/SG/AC.10/11/Rev.5).
• For transport the batteries belong to the category UN3480, Class 9, Packaging Group II, and must be transported according to this regulation. This means that for land and sea transport (ADR, RID & amp; IMDG) they must be packed according to packaging instruction P903. And for air transport (IATA) according to package instruction P965.
  The original packaging complies with these instructions.

1.3 Disposal of Lithium Batteries

• Batteries marked with the recycling symbol must be processed via a recognized recycling agency. By agreement, they may be returned to the manufacturer.
• Batteries must not be mixed with domestic or industrial waste.
• Do not throw battery into a fire.

1.4 Before Connecting

• After unpacking, please check the product and packing list. If the product is damaged or parts missing, please contact HomeGrid.
• Before installation, be sure to turn off the grid power and make sure the battery is in off mode.
• Do not connect the battery to AC power directly. An inverter must be used.
• The embedded BMS in the battery is designed for 48V DC. DO NOT connect batteries in series.
• Make sure that the battery system is grounded.
• Please make sure the inverter and other equipment are compatible.

1.5 During Use

• If the battery system needs to be moved or repaired, the power must be turned off on the BMS and each battery module switched off.
• Do not connect a Stack’d battery to any other type of battery.
• Do not connect a battery to an incompatible inverter.
• Do not attempt to disassemble a battery.

Introduction

The HG Cube is an outdoor energy storage system enclosure that contains one to four of Lithion Battery’s “Stack’d” battery systems. And one to three 12 KW or 15 KW Sol-Ark inverters. It can store up to 153.6 KWh and provide reliable energy storage for several uses. It is especially suited for large homes or small businesses.

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2.1 Functionality
The HG Cube can do the following:

1. Store energy from solar arrays for use later at night or when the wind isn’t blowing.
2. Peak shaving: power from batteries is used to reduce the maximum power drawn from the utility. This can result in cost savings in some jurisdictions.
3. Load shifting. Power from the batteries can be used to reduce the power drawn from utility during peak hours when rates are high. The batteries are recharged during off-peak hours when the rates are lower.
4. Demand response: in some areas the local utility will pay users to provide power to the grid when demand is high. This is called “net metering”. Power flows from the batteries to the grid when demand is high. Then the batteries are recharged when demand is lower and grid power is cheaper.
5. Provide local power when the local utility has experienced an outage.

The HG Cube is modular and upgradeable. If all the battery stacks, battery modules, or inverters are not installed initially, they can be added later. A HG Cube can be installed with one to four “Stack’d “ battery stacks. Each stack consists of a Battery Management System (BMS) and two to eight battery modules. Each module can hold 100 Ah at 48V. Each stack can ther fore store from 9.6 KWh to 38.4 KWh. The BMSs ar connected in a master/slave configuration so they all work together. Each stack in a system must have the same number of battery modules.

2.2 Specifications

• The HG Cube enclosure is 2,000 mm high (78 inches), 2,220 mm wide (87.5 inches), and 1,290 mm deep (50.8 inches), not including the inverters which are mounted on the outside of the enclosure.
• The HG Cube uses lithium iron phosphate batteries (LiFePO4, or just “LFP”). LFP offers good energy storage density, long life, and is inherently safer than other chemistry.
• The output voltage from the battery stacks is 48V.
• The maximum discharge rate is 9 to 45 KW, depending on the configuration.
• The maximum charge rate is 9 to 45 KW, depending on the configuration.
• Warranty: 20 years.
• Service plan: 10 years.
• Discharge temperature: -20°C to +55°C.
• Charge temperature: 0°C to 55°C.
• The charge and discharge temperature ranges are for the outside of the enclosure. The enclosure has internal heating and cooling powered by 110 VAC from the inverters.
• Real time display.
• Upgrade able via Wi-Fi.

All four battery stacks are connected in parallel in the Power Distribution Box, as are the three inverters. The Master Battery Stack is connected to the other stacks over a CAN bus. The Master Stack is connected to the Master Inverter via a second CAN bus connection, and the Master Inverter is connected to the slave inverters via a third CAN bus.

Major Components: Stack’d Battery Stacks

A HG Cube enclosure contains up to four Lithion Battery Stack’d battery stacks. Each stack can have from two to eight 100 Ah battery modules in it. Lithion Battery recommends that each stack have the same number of battery modules in it.
See the HomeGrid “Stack’d Reference Manual” for details on the battery stacks.
3.1 Stack’d Configuration
Each battery stack consists of a base unit, two to eight battery modules, and a battery management module. Each battery module can store 4.8 KWh. So a single stack can store from 9.6 KWh to 38.4 KWh.
A single HG Cube enclosure can contain one to four battery stacks. The total energy stored is therefore 9.6 KWh to 153.6 KWh. One of the battery stacks is configured as stack 1, the master stack. The others are configured as slave stacks 2 through 4. The battery stacks are connected to each other using a CAN bus connection. The master stack is connected to the master inverter using a second CAN bus.
The power connection from all four battery stacks are routed through conduit underneath the floor to bus bars in the Power Distribution Box.
The battery stacks are designated 1 through 4, where Stack #1 is on the left looking from the front and #2 is on the right. Stack #3 is behind Stack #2 and Stack #4 is behind Stack #1 as shown in Figure 3-1.
Top View

Major Components: Sol-Ark Inverters
Each HG Cube enclosure includes one to three Sol-Ark 12 KW or 15 KW inverters. The inverters are mounted outside the enclosure on the left side and the back. The inverters take 48 VDC from the battery stacks and output 120/240/208 Split Phase VAC.
See the Sol-Ark “Limitless 15 L-LV Install Guide and Owner’s Manual” or the Sol-Ark “12 K-2P User Guide” for details on the inverters. The master inverter is connected to the master battery stack controller via a CAN bus.
All three inverters are connected by another CAN bus. This allows the master inverter to control the slave inverters and synchronize their AC output phases. All three inverters are connected to the same bus bar in the Power Distribution Box as the batteries.

Power Distribution Box

The Power Distribution Box is mounted on the left side of the enclosure under the master and slave #1 inverters. It contains two large bus bars, one for battery positive and one for battery negative. All four battery stacks and all three inverters are connected to these bus bars. Each connection point includes a 500A fuse.

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Henderson, NV 89074
info@homegridenergy.com

References

• HomeGrid

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