solarV MT91 Remote Meter User Manual

Remote Meter MT91
USER MANUAL

Safety Instructions

• Thanks for selecting the MT series; please read this manual carefully before using the product.
• Please keep this manual for future reference.
• When you receive the product, check whether there is any damage that occurred in transportation. Contact the transportation company or our company in time for any problem.
• Please read this manual and safety information carefully before installing it.
• Keep the product away from rain, exposure, severe dust, vibration, corrosion, and intense electromagnetic interference.
•  Please avoid water, and other liquids entering the product.
• There are no user-serviceable parts inside the product. Do not disassemble or attempt to repair it.

Overview

MT91 is a new generation of remote meters specially designed for the EPEVER inverters. It displays the real-time parameter of the inverter on one screen. Supporting parameter configuration by the button operations makes the product suitable for different requirements.
Features

• Dual interface design, friendly connection with the EPEVER inverter, and other optional modules
• LCD screen, real-time dynamic display of system data
• Visually error codes, timely notification of warnings and faults
• Load the ON/OFF button to control the load output directly
•  Simple installation and friendly operation interface

Appearance

In the real-time interface, long press for 2 seconds to turn off the load (default on); long press it again for 2 seconds to turn on the load.

⚫ Definition of the inverter terminal/remote terminal:

⚫ Connect the MT91 with an inverter:
Connect the MT91’s “inverter terminal” and the inverter’s RJ45 port through an RS485 communication cable (included accessory, model: CC- RJ45-3.81-100U. The cable length can be customized according to customers’ actual requirement.)
⚫ Connect the MT91 with an auxiliary module
Connect the “remote terminal” of the MT91 and the auxiliary modules such as the Bluetooth module/wireless module/BMS through an adapter cable.

Installation Instructions

Surface mounting installation is recommended.
Step 1: Locate based on the installation size (91mm) and drill two screw holes (no smaller than 77x52mm).
Step 2: Use two PWM3*10 screws to fix the remote meter.

Button Instruction

after the device is powered on), press it for 2s to enter the setting interface.
•In the setting interface, press it for 2s to enter the specific parameter configuration interface.
| Click| Move down/parameter decrease
Press for 2s| •In the real-time interface, press it for 2s to turn on/off the load output (default on, press it for 2s to turn off the load output).
•In the setting interface, press it for 2s to confirm the parameter configuration.
| Click| In the setting interface, click them to exit the parameter configuration interface.
Press for 2s| In the real-time interface, press them for 2s to clear the faults.

Long beep for parameter confirming and short beep for other operations.

Real-time Interface

In the real-time interface(namely, the default interface after the device is powered on), please click or to display the below parameters in a cycle.

Note: means the load being ON status, means the load being OFF status.

Setting Interface

Parameter configuration
Step1: In the real-time interface, press for 2s to enter the parameter setting interface.
Step2: Click or   to select the parameter to be configured.
Step3: Press for 2s to enter the configuration interface of the specified parameter. The parameter value will be flashing.
Step4: click or to configure the parameter value.
Step5: Press for 2s to confirm the configuration.
Step6: Click + to exit the current interface.

Power Saving Mode
Users can enable the power saving mode and set the PSI/PSO value by the / button (The minimum power step is 1VA).
When the actual load power is lower than the PSI (the power to enter the power saving mode), the system will automatically switch to the power saving mode, and then the device output is turned on for 1s and turned off for 5s.
When the actual load power exceeds the PSO (the power to exit the power saving mode), the inverter will automatically exit the power saving mode and resume work.

1) Enable power saving mode (PSE)
Step1: In the real-time interface of the remote meter, press and hold the button   to enter the parameters setting interface.
Step2: Click the or button to select the PSE parameter.
Step3: Press and hold the button until the PSE parameter (OFF default) flashes.
Step4: Click the or   button to set the PSE status.

• Select ON to enable the power-saving mode.
•  Select OFF to disable the power-saving mode.

Step5: Press and hold the   button to confirm.
2) Set the power to enter the power saving mode (PSI)
Step6: In the parameters setting interface, click the   or   button to select the PSI parameter.
Step7: Press and hold the   button until the PSI value flashes.
Step8: Click the   or   button to set the PSI parameter.

• Click the   button to decrease the PSI value by 1.
  Click the button to increase the PSI value by 1.
  Press and hold   the button to increase the PSI value by 10.
  After ten operations, the PSI value will increase by 100 each time. When thebutton is released, press and hold it again to repeat the above operation (Note: The setting parameter cannot exceeds the user define, or it will back to the initial value o start the loop).

Step9: Press and hold the button to confirm.

3) Set the power to exit the power saving mode (PSO)
Step10: In the parameters setting interface, click the or  button to select the PSO parameter.
Step11: Press and hold the button until the PSO value flashes.
Step12: Click the or button to set the PSO parameter.

• Click the  button to decrease the PSO value by 1.
• Click the   button to increase the PSO value by 1.
• Press and hold   the button to increase the PSO value by 10. After ten operations, the PSO value will increase by 100 each time.
  When the button is released, press and hold it again to repeat the above operation (Note: The setting parameter cannot exceed the user definition, or it will back to the initial value to start the loop).

Step13: Press and hold the button to confirm.

• Parameters user define

power)
| Power Saving Out| 40VA| (20VA + PSI) – (50%*rated power)
| Baud Rate Select| 115200| 9600/115200
| Low voltage disconnect voltage®| 12V: 10.8V 24V: 21.6V
48V: 43.2V| 12V: 10.5V-14.2V; step size 0.1V 24V: 21V-30.2V; step size 0.1V 48V: 42V-62.4V; step size 0.1V
---|---|---|---
| Low voltage reconnect voltage®| 12V: 12.5V 24V: 25V
48V: 50V| 12V: 11.5V-15.2V; step size 0.1V 24V: 22V-31.2V; step size 0.1V 48V: 43V-63.4V; step size 0.1V
| Overvoltage reconnect voltage®| 12V: 14.5V 24V: 29V
48V: 58V| 12V: 11.5V-15.2V; step size 0.1V 24V: 22V-31.2V; step size 0.1V 48V: 43V-63.4V; step size 0.1V
| Overvoltage disconnect voltage®| 12V: 16V 24V: 32V
48V: 64V| 12V: 12.5V-16.2V; step size 0.1V 24V: 23V-32.2V; step size 0.1V
48V: 44V-64.4V; step size 0.1V

① After configuring the parameters marked with ①, the inverter will restart automatically. It will resume work according to the new parameter value.
② NPower and IPower-Plus series support the modification of parameters marked with②. Please refer to the following rules for the modification; otherwise, the parameter setting will not succeed. IPower does not support modification of parameters marked with②.

• Rules for battery protection voltage
  A. Over voltage limiting voltage(16.2/32.2/64.4V) ≥ Over voltage disconnect voltage ≥ Over voltage reconnect voltage +1V.
  B. Over voltage reconnect voltage ≥ Low voltage reconnect voltage.
  C. Low voltage reconnect voltage ≥ Low voltage disconnect voltage +1V.
  D. Low voltage disconnect voltage ≥ Low voltage limiting voltage(10.5/21/42V).

• Detailed status is shown as the following when reaching the protection voltage point.

The blue indicator fast flashes.
Buzzer beeps.LCD displays the
Overvoltage reconnect| The blue indicator is ON solid.
The output voltage is normal.
Low voltage protection| The output is switched OFF.
The blue indicator slowly flashesBuzzer beeps.
LCD displays the
Low voltage reconnect| The blue indicator is ON solid.
The output voltage is normal.

Note: Although the inverter is designed with the over-voltage protection function, the surge voltage is not higher than 20V for the 12V system, not higher than 40V for the 24V  system, and not higher than 80V for the 48V system; otherwise, the inverter may be damaged.

Error Codes

Error
code| Faults| Buzzer| Working indicator| Fault indicator
---|---|---|---|---
| Inverter over temperature
Heat sink over temperature| 5 beeps| OFF| ON solid
| Input over voltage| 5 beeps| Fast flashing (1 Hz)| OFF
| Input low voltage| 5 beeps| Slowly flashing (1/4Hz)| OFF
| Output short circuit| 5 beeps| OFF| Fast flashing (1Hz)
| overload| 5 beeps| ON solid lowly| Slowly flashing (1/4Hz)
| Output voltage abnormal| 5 beeps| OFF| OFF

Specifications

23mA/5V(backlight)
Environment temperature| -20°C ∼+60°C
Storage temperature| -35°C ∼+70°C
Dimension| φ100mm X 19.4mm(Diameter X Height)
Mounting size| φ100mm X 50mm(Diameter X Height)
Mounting hole size| 03.5mm
Net Weight| 65g

① IPower-Plus supports MT91 whole functions, while IPower/NPower supports part MT91 functions; for detailed supported functions, refer to the user manual.

Dimension

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