Julian-Indaiatuba
New Member
- Joined
- Nov 5, 2019
- Messages
- 45
Hello,
About 4 months ago, I exchanged by 8 lead acid batteries for one LiFePO4 100Ah battery, made by Unicoba, which is a renowned company with decades of experience in manufacturing batteries here in Brazil.
At about 10:30 pm every night, I switch the inverter, a Growatt SPF3500ES, to battery power only, which runs my house until the sun comes up, when the battery starts charging again, and the inverter uses both the sun and battery power. When the sun goes down, I switch the inverter to grid power only, until I go to bed, and switch it back to battery.
I have set the inverter to switch back to grid power at 25% if the SOC should get to low during the night. This never really happens, except for about once a month when I get sudden percentage drops. For instance, last night the inverter shows that the battery SOC suddenly dropped from 31% to 1%, which makes the inverter switch back to the grid immediately. I really don’t understand why! Usually it runs perfectly using the battery’s bms.
I have added 4 images which show the battery’s details, the SOC during a normal night and day, and how the battery behaved last night.
Any suggestions on how to resolve this would be greatly appreciated.
Thanks in advance.
About 4 months ago, I exchanged by 8 lead acid batteries for one LiFePO4 100Ah battery, made by Unicoba, which is a renowned company with decades of experience in manufacturing batteries here in Brazil.
At about 10:30 pm every night, I switch the inverter, a Growatt SPF3500ES, to battery power only, which runs my house until the sun comes up, when the battery starts charging again, and the inverter uses both the sun and battery power. When the sun goes down, I switch the inverter to grid power only, until I go to bed, and switch it back to battery.
I have set the inverter to switch back to grid power at 25% if the SOC should get to low during the night. This never really happens, except for about once a month when I get sudden percentage drops. For instance, last night the inverter shows that the battery SOC suddenly dropped from 31% to 1%, which makes the inverter switch back to the grid immediately. I really don’t understand why! Usually it runs perfectly using the battery’s bms.
I have added 4 images which show the battery’s details, the SOC during a normal night and day, and how the battery behaved last night.
Any suggestions on how to resolve this would be greatly appreciated.
Thanks in advance.