lincomatic
Well-known member
- Joined
- Jun 10, 2011
- Messages
- 316
My 2011 Leaf is on its last legs. SOH is only 47%. After going through a lot of analysis, and finding out that it's not easy to do an upgrade to a higher range battery, I realized that the battery is worth more to me than the entire car. It still has >11kWh capacity left in it, which would make it a nice candidate to repurpose as a back up battery for my house.
Lots of people are taking Leaf batteries apart, making 48V modules, and building powerwalls out of them. I was thinking, wouldn't it be a lot safer, less labor intensive, and better for battery management if one were to just leave the Leaf battery pack intact, and reuse the existing charger and BMS? Solar inverters made for PV strings can easily handle the ~400V output of the Leaf battery.
So the basic idea is to extract whatever components I need from the Leaf to charge the unmodified battery pack using my OpenEVSE J1772 EVSE. Then I would use the battery to power a solar string inverter. Does anyone have any information on which components to extract from the Leaf and what I would need to do to allow charging? (I imagine that various faults might be generated within the system of certain components are missing).
The BMS is in the battery pack. I need the charger, and also the VCM? Does it need to handshake w/ any other control modules just to charge?
Lots of people are taking Leaf batteries apart, making 48V modules, and building powerwalls out of them. I was thinking, wouldn't it be a lot safer, less labor intensive, and better for battery management if one were to just leave the Leaf battery pack intact, and reuse the existing charger and BMS? Solar inverters made for PV strings can easily handle the ~400V output of the Leaf battery.
So the basic idea is to extract whatever components I need from the Leaf to charge the unmodified battery pack using my OpenEVSE J1772 EVSE. Then I would use the battery to power a solar string inverter. Does anyone have any information on which components to extract from the Leaf and what I would need to do to allow charging? (I imagine that various faults might be generated within the system of certain components are missing).
The BMS is in the battery pack. I need the charger, and also the VCM? Does it need to handshake w/ any other control modules just to charge?