SolarV EPEVER MT91 User manual

USER MANUAL
Remote Meter MT91

Contents
1. Safety Instructions...................................................................................1
2. Overview.................................................................................................2
3. Appearance.............................................................................................3
4. Installation Instructions ............................................................................6
5. Button Instruction.....................................................................................7
6. Real-time Interface..................................................................................8
7. Setting Interface ......................................................................................9
8. Error Codes...........................................................................................17
9. Specifications........................................................................................18
10. Dimension...........................................................................................19

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Copyright © 2022 SolarV GmbH All rights reserved
Thanks for selecting the MT series; please read this manual carefully before
using the product.
Please keep this manual for futurereference.
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 enter into theproduct.
There are no user-serviceable parts inside the product. Do not disassemble
or attempt to repair it.
1. Safety Instructions

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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, which
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 andfaults
Load ON/OFF button to control the load output directly
Simple installation and friendly operationinterface
2. Overview

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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 theload.
3. Appearance
Screw hole
Screw hole
LCD
UP/Setting button
Down/OK button
Load switch
Fault indicator(red)
Working indicator(blue)

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Buzzer
Remote terminal
Inve rter
terminal
⚫ Definition of the inverter terminal/remote terminal:
0 A B +5V 0 A B +5V

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⚫ 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.
Surface mounting installation is recommended.
Step 1: Locate based onthe installation size (91mm) anddrilltwo screwholes
(no smaller than 77x52mm).
Step 2: Use two PWM3*10 screws to fix the remote meter.
4. Installation Instructions

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Button
Operation
Instruction
Click
Move up/parameter increase
Press for
2s
In the real-time interface (that is,
the default interface 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.
5. Button Instruction

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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.
6. Real-time Interface
Battery voltage
Load voltage
Load current
Load frequency
Load power

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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 beflashing.
Step4: click or to configure the parametervalue.
Step5: Press for 2s to confirm theconfiguration.
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).
7. Setting Interface

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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 settinginterface.
Step2: Click the or button to select the PSEparameter.
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 savingmode.
Select OFF to disable the power savingmode.

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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 valueflashes.
Step8: Click the or button to set the PSI parameter.
Click the button to decrease the PSI value by1.
Click the button to increase the PSI value by1.
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 the button is released, press and hold it againto repeat
the above operation (Note: The setting parameter cannot
exceeds the user define, or it will back to the initial value to
start the loop).

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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 holdthe button until the PSO valueflashes.
Step12: Click the or button to set the PSO parameter.
Click the button to decrease the PSO value by1.
Click the button to increase the PSO value by1.
Press and hold the button to increase the PSO value by 10.
After ten operations, the PSO valuewill 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
exceeds the user define, or it will back to the initial value to
start the loop).

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Step13: Press and hold the button to confirm.
Parameters user define
Display
Parameters
Default
User define
Output voltage
class①
220VAC
220VAC/230VAC/240VAC
110VAC
100VAC/110VAC/120VAC
Output
frequency class①
50Hz
50Hz/60Hz
LCD backlight
time
30s
30s/ 60s/100s(ON solid)
Power Saving
Enable
OFF
ON/OFF
Power Saving In
20VA
20VA ~ (20%*rated
power)
Power Saving
Out
40VA
(20VA + PSI) ~
(50%*rated power)
Baud Rate
Select
115200
9600/115200

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Low voltage
disconnect
voltage②
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
voltage②
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
Over voltage
reconnect
voltage②
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
Over voltage
disconnect
voltage②
12V: 16V
24V: 32V
48V: 64V
12V: 12.5V~16.2V; step
size 0.1V
24V: 23V-32.2V; step size

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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).

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Detail status is shown as the following when reaching the protection
voltage point.
Input voltage
protection
Status
Over voltage protection
The output is switched OFF.
The blue indicator fast flashes.
Buzzer beeps.
LCD displays the .
Over voltage reconnect
The blue indicator is ON solid.
The output voltage is normal.
Low voltage protection
The output is switched OFF.
The blue indicator slowly flashes.
Buzzer 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.

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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
(1Hz)
OFF
Input low
voltage
5 beeps
Slowly
flashing
(1/4Hz)
OFF
Output short
circuit
5 beeps
OFF
Fast
flashing
(1Hz)
Output
overload
5 beeps
ON solid
Slowly
flashing
(1/4Hz)
Output voltage
abnormal
5 beeps
OFF
OFF
8. Error Codes

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Model
MT91
Compatible products
IPower-Plus, IPower/NPower①
Power supply
5VDC
Power supply method
Inverter communication port
LCD visual angle
12' clock
LCD backlight
Yes
Installation method
Surface mounting installation
Self-consumption
14mA/5V(no backlight)
23mA/5V(backlight)
Environment temperature
-20℃～+60℃
Storage temperature
-35℃～+70℃
Dimension
φ100mm X 19.4mm(Diameter X Height)
Mounting size
φ100mm X 50mm(Diameter X Height)
Mounting hole size
Φ3.5mm
Net Weight
65g
① IPower-Plus supports MT91 whole functions, while IPower/NPower
supports part MT91 functions; for detail supported functions, refer to
user manual.
9. Specifications