Changing to LifeP04 280ah 16s, so most likely will sell the existing powerwall.
Most of these batteries came from medical modems which I took apart and built these strings over several months. All batteries were capacity tested and average 2700 ma for the whole pack. I sorted these in groups of capacity and built the strings picking from each group so as to keep the strings balanced as to capacity.
Some strings have fuses on positive side instead of light wires. I followed "Average Joe" when he was building 18650 packs.
The DIYBMS by Stuart Pittaway v4, does passive balance, and pack stays around 40mv difference. I have always used these lightly with Sol-Ark 8K and 10 circuit transfer box. They will almost make it from 5pm to 9am powering these 10 circuits. I charge them with 12 327w PV on dual axis tracker I built and programmed.
Sol-Ark settings: 45amp limit charging and discharging. 54.2v float. Discharge cutoff 44v. Very conservative settings.
Also I do not run these every day, mostly used as generator on standby for power outages. So, they have lots of use left I imagine.
I'm located in Louisiana. These strings can be unmounted pretty easy, but shipping might be a problem. Mounting board goes with the batteries and bms.
Most of these batteries came from medical modems which I took apart and built these strings over several months. All batteries were capacity tested and average 2700 ma for the whole pack. I sorted these in groups of capacity and built the strings picking from each group so as to keep the strings balanced as to capacity.
Some strings have fuses on positive side instead of light wires. I followed "Average Joe" when he was building 18650 packs.
The DIYBMS by Stuart Pittaway v4, does passive balance, and pack stays around 40mv difference. I have always used these lightly with Sol-Ark 8K and 10 circuit transfer box. They will almost make it from 5pm to 9am powering these 10 circuits. I charge them with 12 327w PV on dual axis tracker I built and programmed.
Sol-Ark settings: 45amp limit charging and discharging. 54.2v float. Discharge cutoff 44v. Very conservative settings.
Also I do not run these every day, mostly used as generator on standby for power outages. So, they have lots of use left I imagine.
I'm located in Louisiana. These strings can be unmounted pretty easy, but shipping might be a problem. Mounting board goes with the batteries and bms.
