Spacey73
Member
You have been moving in similar circles to me it seems
Worst thing you can do to an ebike or any other battery is to stick a top floating BMS on them. To balance it you have to leave the battery at 100% which causes tendril growth and that's how they catch fire especially lipo's. The balancing amount on the normal ebike BMS are only 0.25w a cell and would take weeks to balance.... running them to empty causes them to go out of balance very quickly and the BMS has no hope of keeping up.
The best device is one that balances at any voltage and just shunts the current around at 18w a cell ...72 x faster and much kinder on the pack than your regular BMS. Also means you can charge them to 80% without worrying about balancing as they are always in balance.
Lipo packs like yours rock and I did have them in my Violator ebike (20kw motor) but fire risk was too high for me. I went with 30A 18650 cells 20 series and 10 parallel so 1.8kwh pack that could potentially push out 21.6 KW of power for 10 secs.... like you say if pulsed it's not a problem. Building it and cost was a mare 8 years ago though.
If you want to get into solar don't get them fitted, do it yourself and have them in your garden not on the roof. Easy to angle them into the sun and they can be propped up against the fence. cheap if you get them from old new stock in bulk.
I'll never sell back the grid though...5p/kwh no thanks that 1 kwh can make me £3 mining Ethereum a much better way to spend the surplus energy. Solar without a battery is kindof pointless unless you work from home or are retired. I will get a Tesla powerwall at some point though.
Worst thing you can do to an ebike or any other battery is to stick a top floating BMS on them. To balance it you have to leave the battery at 100% which causes tendril growth and that's how they catch fire especially lipo's. The balancing amount on the normal ebike BMS are only 0.25w a cell and would take weeks to balance.... running them to empty causes them to go out of balance very quickly and the BMS has no hope of keeping up.
The best device is one that balances at any voltage and just shunts the current around at 18w a cell ...72 x faster and much kinder on the pack than your regular BMS. Also means you can charge them to 80% without worrying about balancing as they are always in balance.
Lipo packs like yours rock and I did have them in my Violator ebike (20kw motor) but fire risk was too high for me. I went with 30A 18650 cells 20 series and 10 parallel so 1.8kwh pack that could potentially push out 21.6 KW of power for 10 secs.... like you say if pulsed it's not a problem. Building it and cost was a mare 8 years ago though.
If you want to get into solar don't get them fitted, do it yourself and have them in your garden not on the roof. Easy to angle them into the sun and they can be propped up against the fence. cheap if you get them from old new stock in bulk.
I'll never sell back the grid though...5p/kwh no thanks that 1 kwh can make me £3 mining Ethereum a much better way to spend the surplus energy. Solar without a battery is kindof pointless unless you work from home or are retired. I will get a Tesla powerwall at some point though.