Solarfun4jim
Solar seduced :-)
On a mobile RV setup, with three charging sources,
1. Solar input via a SCC (constant whilst the sun shines) [0.1C charge rate]
2. A sterling Bat to Bat charger (to charge from vehicle on long drives). [0.2C charge rate].
3. Charger on a multiplus inv/charger, whose charge function would only operate on the very few occasions that i connected to campsite/grid power [0.25C charge rate].
My belief is that very little BMS balancing takes place outside of the 'knees', since voltage differences are so minimal outside of this. I have no desire however to charge up into the kness significantly, looking to terminate around 3.47v/cell. Hence i was thinking, that if i profiled the SCC & Sterling to charge to 3.47v/cell equivalent(27.8v on 24v nominal) but programmed the multiplus to charge to 3.6v/cell and had my BMS programmed to 3.65v/cell max, on the very few occasions that i'm grid connected, might this be enough to effect any necessary 'balance function' ?
I fully intend to 'Top balance' anyways, so felt this might be wholly enough to stay perfectly in balance over time?
Any opinions?
1. Solar input via a SCC (constant whilst the sun shines) [0.1C charge rate]
2. A sterling Bat to Bat charger (to charge from vehicle on long drives). [0.2C charge rate].
3. Charger on a multiplus inv/charger, whose charge function would only operate on the very few occasions that i connected to campsite/grid power [0.25C charge rate].
My belief is that very little BMS balancing takes place outside of the 'knees', since voltage differences are so minimal outside of this. I have no desire however to charge up into the kness significantly, looking to terminate around 3.47v/cell. Hence i was thinking, that if i profiled the SCC & Sterling to charge to 3.47v/cell equivalent(27.8v on 24v nominal) but programmed the multiplus to charge to 3.6v/cell and had my BMS programmed to 3.65v/cell max, on the very few occasions that i'm grid connected, might this be enough to effect any necessary 'balance function' ?
I fully intend to 'Top balance' anyways, so felt this might be wholly enough to stay perfectly in balance over time?
Any opinions?