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In the uk I’m currently not allowed to buy a cheap old nissan leaf car with a worn old 22kwh battery pack (that’s basically useless for transport now, something

In the uk I’m currently not allowed to buy a cheap old nissan leaf car with a worn old 22kwh battery pack (that’s basically useless for transport now, something like 30 mile range in perfect conditions) and connect it to supply my house. I can buy electricity from the grid at 5p/kwh between 12pm and 5am and if i was allowed to charge that car and then draw my daily 10kwh of house usage from it instead of paying 20p/kwh during the day. I’d be happy to give some percentage to the grid but it’s just not allowed by most DNO’s here right now. Wallbox.com has a £10k bi durectional wallbox (quantum) that can be deployed in a few very select areas in the UK currently. My best option right now is a couple of £2.5k battery packs from givenergy but my supplier won’t switch me to the ev tarrif without proof i own an EV. Also the givenergy route is the same price as the old leaf but for half the capacity.

mattbee 5y ago
What kind of inverter could you use to connect an old traction battery to supply your house? (I have a Leaf and solar backed by a 4.5kWh battery so... for the future I suppose)
- CraigJPerry 5y ago
  There’s a 7kw inverter in the wallbox https://wallbox.com/en_catalog/quasar-dc-charger https://wallbox.com/en_catalog/quasar-dc-charger - turns out i got the name wrong, it’s quasar not quantum :-)
  - mattbee 5y ago
    How cool, I didn't know that was possible. So CHAdeMO lets EVs discharge as well as charge? I assumed you were talking about a hack. So why can't that particular inverter be connected to your home? I have _two_ separate solar inverters connected to mine already!
    - CraigJPerry 5y ago
      It’s in use in Japan as i understand it but in the UK the DNOs currently don’t have appropriate controls in place for when the power goes out as i understand it. I believe people with solar and batteries on their property have no power when there’s a power cut - their inverter turns off for safety of the DNO operatives if mains power goes out. Im not that clued up on this. Tent with a big pinch of salt…!
      - mattbee 5y ago
        Oh I see! Right, yes, that applies to my two inverters, which have an "off grid" mode which I don't use for this reason. The electrician who wired in the system offered to add in an isolator to cut the house off from the mains. That way I could use the "off grid" mode, but it'd have to be something pretty bad for me to want to use it & reconfigure the inverters too.
jeofken 5y ago
To save other readers a lookup, 30 miles = 48.28km

mattbee 5y ago

What kind of inverter could you use to connect an old traction battery to supply your house? (I have a Leaf and solar backed by a 4.5kWh battery so... for the future I suppose)

CraigJPerry 5y ago
There’s a 7kw inverter in the wallbox https://wallbox.com/en_catalog/quasar-dc-charger https://wallbox.com/en_catalog/quasar-dc-charger - turns out i got the name wrong, it’s quasar not quantum :-)
- mattbee 5y ago
  How cool, I didn't know that was possible. So CHAdeMO lets EVs discharge as well as charge? I assumed you were talking about a hack. So why can't that particular inverter be connected to your home? I have _two_ separate solar inverters connected to mine already!
  - CraigJPerry 5y ago
    It’s in use in Japan as i understand it but in the UK the DNOs currently don’t have appropriate controls in place for when the power goes out as i understand it. I believe people with solar and batteries on their property have no power when there’s a power cut - their inverter turns off for safety of the DNO operatives if mains power goes out. Im not that clued up on this. Tent with a big pinch of salt…!
    - mattbee 5y ago
      Oh I see! Right, yes, that applies to my two inverters, which have an "off grid" mode which I don't use for this reason. The electrician who wired in the system offered to add in an isolator to cut the house off from the mains. That way I could use the "off grid" mode, but it'd have to be something pretty bad for me to want to use it & reconfigure the inverters too.

jeofken 5y ago

To save other readers a lookup, 30 miles = 48.28km