Hello,
Newbie here. I've just got my first solar system setup recently powering my house during blackouts.
My setup is: Must PV18-5248PRO inverter (5.2kW, 48v) with Must LP16-48100 battery (16s, 48v, 100AH) and 6 x 550W solar panels.
Inverter is set to SUB (Solar-Utility-Battery) mode [program 01].
I followed the manual of the inverter and battery to configure all other params but I think I do not understand it all right.
Let me explain the issue I see there.
Sunny day, battery is fully charged. Utility power is absent. Entire house is powered by PV energy (about 400W) and that is indicated on the screen of the inverter.
But when I switch an electric water heater on (1.2kW) I see next behavior:
- 400W is still provided by the PV and additional 1.2kW is pulled from the battery (I guess this is expected as PV can not "instantly" provide that much power)
- in a few seconds PV power starts to increase
- battery discharges by a fraction during that time
- PV power grows up to 2.8kW powering entire load and starts to charge the battery in the same time (1.6kW to the loads and 1.2kW into the battery)
- in several seconds battery is full again so charging stops (it seems like BMS cuts it off as I even hear the click in the battery)
- PV power drops to 0 instantly so battery powers entire load
- PV power starts to grow up from 0 to 2.8kW
and the cycle repeats again and again and again
I do not know if it is ok that it tries to pump 100% charge into the battery all the time and I'm not able to find any related options in the setup to stop doing it.
Does anybody have any thoughts on this? What did I configure wrong?
Thanks a lot for any help
Newbie here. I've just got my first solar system setup recently powering my house during blackouts.
My setup is: Must PV18-5248PRO inverter (5.2kW, 48v) with Must LP16-48100 battery (16s, 48v, 100AH) and 6 x 550W solar panels.
Inverter is set to SUB (Solar-Utility-Battery) mode [program 01].
I followed the manual of the inverter and battery to configure all other params but I think I do not understand it all right.
Let me explain the issue I see there.
Sunny day, battery is fully charged. Utility power is absent. Entire house is powered by PV energy (about 400W) and that is indicated on the screen of the inverter.
But when I switch an electric water heater on (1.2kW) I see next behavior:
- 400W is still provided by the PV and additional 1.2kW is pulled from the battery (I guess this is expected as PV can not "instantly" provide that much power)
- in a few seconds PV power starts to increase
- battery discharges by a fraction during that time
- PV power grows up to 2.8kW powering entire load and starts to charge the battery in the same time (1.6kW to the loads and 1.2kW into the battery)
- in several seconds battery is full again so charging stops (it seems like BMS cuts it off as I even hear the click in the battery)
- PV power drops to 0 instantly so battery powers entire load
- PV power starts to grow up from 0 to 2.8kW
and the cycle repeats again and again and again
I do not know if it is ok that it tries to pump 100% charge into the battery all the time and I'm not able to find any related options in the setup to stop doing it.
Does anybody have any thoughts on this? What did I configure wrong?
Thanks a lot for any help
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