We use a lot of electricity (no gas, so heating and cooking are all electric; ASHP and induction hob). We're using about 40-50kWh/day averaged over the year. Hence, I'd love to be able to store 50+kWh off-peak. We also have a 4kWp solar system with a Sunny Boy inverter.
If I buy a used EV battery, e.g. from an MG ZS or MG 5 or Nissan Leaf, what's the best way of wiring up and which inverter would be best? My current thoughts are to remove the modules from the EV battery (~18 modules) and have them in the house. Are there any dangers there? Otherwise, I can build a small shed for the entire EV pack and wire that in - but I can only find very DIY approaches there e.g. Dala.
As far as the system goes, I could either replace the Sunny Boy inverter with a Quattro (e.g. 48/8000) or add the quattro and some more solar panels (another few kWp).
We do also have a Nissan Leaf and have been planning to upgrade the battery, but I think the capacity here is only 20kWh. If this is much easier to set up it'll be considered. I haven't found any ways of bi-directional charging at reasonable cost (V2G/V2H), which would have been my preferred method.
Any input welcomed!
