Building stationary power system using old HV packs

Here is some good reading on how folks have used the Prius (and its battery) for home power backup. Lots of good information on this site!
The Correct Answer

Posted via the PriusChat mobile app.

 

I don't think it would be worth the trouble and how would you charge them back up?
Portable generators are a pain but they do work. I have a 20KW Kohler whole house generator that starts automatically within ten seconds after power goes out.

 

It says everything you'd need to know to be able to find a proper inverter that would allow you to supply AC loads from the DC battery packs you have while providing isolation. (The load side of your question.)

The only piece you would have to figure out is the charging side, which would not be trivial with the battery packs operating at over 200 V DC.

Be safe.

Posted via the PriusChat mobile app.

 

how does musk recharge the power wall, solar?

 

What an opportunity! The only thing that has prevented me from building something like that was mostly the lack of scrap hybrid cars... Hmm...

You can possibly build yourself a great setup. Put a few batteries on a bus, put inverter(s) on it to supply domestic power, then put a charger on the bus and run it when grid power is available. You might get it all to balance so that you can enjoy constant power, even with low average grid availability.

Be careful and have fun!

 

I don’t think the battery’s in Toyota’s would make a very good Backup for your home power going out. It was not designed for that and 6.5 amp hours won’t go far beyond some light bulbs.

 

No, but when you're in Lagos and the grid is only available a random 9 hours per day and you happen to already have some big batteries from cars? I'd be pretty motivated to solve this puzzle myself.

 

When you are in the dark and your sump pump is overflowing, and your freezer is thawing, who cares about being green.

 

Having battery packs are cool but i thought most solar equipment used 24 and 48 volts thru deep cycle batteries that tend to not throw off heat. How are you going to keep the battery packs from overheating under load? How are you going to convert 240 volts DC to 115?(220?) AC?

 

The modules only have around 6amp hours of total energy when new. (6.5)

That means you can run a 6 amp load for 1 hour.
Or a 1 amp load for 6 hours.
That is not much power.

 

but he has lots of highlander, camry and prius packs. that's a lot of power.

 

But they are likely quite dissimilar.
Dissimilar capacity.
Dissimilar discharge rates.
Dissimilar charge rates.
Dissimilar internal resistance.
Dissimar internal resistance.
This can cause big problems

You would need to do some serious monitoring of things if you. Would be b stbto stay in the middle of the SOC.

That said, anything is possible.
If you were stuck in aremote area and these were your only means for power, you could definitely make it work.

 

Ummm...Sure.

How to convert 1 amp to watts (W)

 

Anything is possible, given enough time and money. If you are going to go to the expense of building a solar/grid charged UPS you would be better served by some Golf cart Batteries.

 

Yes, the Powerwall can charge from solar. Fully off grid is not technically supported at this time, though. As backup for outages, no problem and solar will continue to charge.

 

so the same for toyota batteries i assume.