Hello all.
I've built my first solar and DC-DC charging system for my camper van with a DIY lifepo4 12v battery.
It uses 4 used CATL 150ah 3.2v cells in series. and this JBD BMS (the 150A one): https://www.aliexpress.com/item/1005001564046325.html Attached are images of the parms. I use the stock Lifepo4 'normal' pre-programmed values. I took the image of the main screen of the app after I'd run the battery down until it cut out.
I have a new Renogy 30A DC-DC hooked up to it: https://www.amazon.co.uk/Renogy-DC-DC-board-Battery-Charger/dp/B0891SJTD5
The system works pretty well in that it can run a heat gun or a microwave oven for a good long time so I'm fairly happy, but cell 4 is always high in voltage compared with the others and cell 1 always low, so maybe I'm not getting best performance out of it.
I'm pretty sure that in one of Will's very many videos, he'd said if you have a BMS, don't worry about balancing, the BMS will take care of it after a few cycles. However I've only seen cells 3 and 4 balancing in the Android app. It's version 3.1.1026. It is the admin version.
Any help much appreciated!
Chris.
I've built my first solar and DC-DC charging system for my camper van with a DIY lifepo4 12v battery.
It uses 4 used CATL 150ah 3.2v cells in series. and this JBD BMS (the 150A one): https://www.aliexpress.com/item/1005001564046325.html Attached are images of the parms. I use the stock Lifepo4 'normal' pre-programmed values. I took the image of the main screen of the app after I'd run the battery down until it cut out.
I have a new Renogy 30A DC-DC hooked up to it: https://www.amazon.co.uk/Renogy-DC-DC-board-Battery-Charger/dp/B0891SJTD5
The system works pretty well in that it can run a heat gun or a microwave oven for a good long time so I'm fairly happy, but cell 4 is always high in voltage compared with the others and cell 1 always low, so maybe I'm not getting best performance out of it.
I'm pretty sure that in one of Will's very many videos, he'd said if you have a BMS, don't worry about balancing, the BMS will take care of it after a few cycles. However I've only seen cells 3 and 4 balancing in the Android app. It's version 3.1.1026. It is the admin version.
Any help much appreciated!
Chris.