thehackedone
New Member
- Joined
- Jul 19, 2021
- Messages
- 8
I have an issue with settings 12 and 13, my battery max charge is 46.5V is 100% fully
so my battery never reaches 48V and will never switch from grid power the cut off is 40V-43V, I cannot lower the settings on 12 and 13 anymore. Is there any way to get it lower? I reached out to Growatt but after about a week I haven't heard anything yet.
12=44V
13=48V
These are the current minimum settings for the inverter.
Ideally I would like to see 12 at 42 and 13 at 45 or 46.
My reasonings on this are the email I got from bigbattery.com in reference to the 48V LAMA - LiFePO4-115Ah-5.3kWh
"For the battery to stop at 49V is perfectly normal as anything above 46.5V is 100% fully charged for this battery. Lithium batteries state of charge is a curved graph, not a linear graph; so checking the state of charge is not as easy as saying "51V=100%, 50V=90%, etc", it just doesn't work like that, 46.5V is about 99% of the battery and the reason it wouldn't reach 51V is because the battery is at 99% and putting anything more in there might put it over 100% full and the BMS will always prevent it from going that high so that it doesn't damage the cells in the battery"
Hopefully this will help others not make this mistake with this battery/inverter in the future if we cannot solve the issues.
so my battery never reaches 48V and will never switch from grid power the cut off is 40V-43V, I cannot lower the settings on 12 and 13 anymore. Is there any way to get it lower? I reached out to Growatt but after about a week I haven't heard anything yet.
12=44V
13=48V
These are the current minimum settings for the inverter.
Ideally I would like to see 12 at 42 and 13 at 45 or 46.
My reasonings on this are the email I got from bigbattery.com in reference to the 48V LAMA - LiFePO4-115Ah-5.3kWh
"For the battery to stop at 49V is perfectly normal as anything above 46.5V is 100% fully charged for this battery. Lithium batteries state of charge is a curved graph, not a linear graph; so checking the state of charge is not as easy as saying "51V=100%, 50V=90%, etc", it just doesn't work like that, 46.5V is about 99% of the battery and the reason it wouldn't reach 51V is because the battery is at 99% and putting anything more in there might put it over 100% full and the BMS will always prevent it from going that high so that it doesn't damage the cells in the battery"
Hopefully this will help others not make this mistake with this battery/inverter in the future if we cannot solve the issues.