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Old 05-26-2019, 03:15 PM   #1
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Prius, Volt, Tesla, etc setup for solar bank?

Anyone take the components from an electric car and use it for their bus solar setup? If so can you list cost, complexity, design, positives and negatives, etc.
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Old 05-26-2019, 03:43 PM   #2
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A few have, it's expensive, complex, and need a separate charging system I believe.
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Old 05-26-2019, 03:49 PM   #3
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I reasearched this same topic pretty heavily when I redid my battery bank. in the end, I concluded that in straight $ for AH comparison, lead acid is very much the king. the downsides to lead acid are primarily weight and volume, in an EV/hybrid car - that counts, maybe not so much in a skoolie though I went with dual purpose lead acids, 3 of em fit in the stock battery box so that's how many I got plus they charge off the alternator but have higher AH capacity than starting batteries
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Old 05-26-2019, 04:33 PM   #4
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Good advice above......

A battery pack salvaged from a hybrid or electric car will require a sophisticated battery management system (BMS).

Some of them are also liquid cooled. Not sure how to approach that.

FLA will give you the best value of A/H vs. cost vs. lifespan.
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Old 05-26-2019, 05:07 PM   #5
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Lithium Ion batteries pack a nice punch but do require much more care than Lead acid or AGM style..



if you are going to run them down much id go with AGM deep cycl;e batteries as standard Lead acids dont like to be run dead and recharged too many times..



everyone has their own ideas about the best way to charge batteries and science supports there are proper ways to charge battery banks back up...



the House batteries in my DEV bus are AGM and i just charge them with the alternator as I dont have solar
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Old 05-26-2019, 05:34 PM   #6
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Article I read was LiPo is the best option, yes, they are pricey up front, but being able to drain them near 100%, unlike a FLA battery at 50%. After the recommended numbers of charging on the FLAs renders them useless before the LiPo. The only thing keeping me from LiPo is the heavy up front cost. I'd rather replace $100 batteries every 5 years than the up front cost of LiPo.
It reminds me of when solar residential first came popular and the bragging of how much money you would save. I calculated what a decent house system cost and determined you would see a ROI in about 15-20 years.
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Old 05-26-2019, 06:13 PM   #7
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dangerous without solid engineering skills

LFP much safer
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Old 05-26-2019, 10:56 PM   #8
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Thanks to all, good info! I didn’t know if it was as simple as pulling all the parts and wiring, controllers, management system, etc from the car and setting them up in the bus with some mods to use for that purpose. Sounds like it could be done but would take some serious Engineering and such to make sure it worked correctly, and no benefit unless you happen to have a free car to gut.
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Old 05-28-2019, 01:14 PM   #9
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I have and here is a few pictures of what I did.
volt battery costs as follows:
battery 1200.00
labor to reconfigure was about 20 hrs
misc wiring 300.00
17kw of power that can be taken down to 30% of that
Love the set up however with the volt I could upgrade a special balancing charger for 2500.00 and still might. if I just take it to 40% discharge the battery should stay in balance. And I check it every few weeks as I am still in testing mode.
Neg:
1.much cheaper to use Nissan leaf battery as there are much easy to get a balance charger. ( viltron )
2. taking the battery from 360v to 48v is highly dangerous
3. fear of not being a engineer and it catching fire.

If I did it all over I would have spent 10k on lipo set up from a company so its safer in my option and has safe guard built in.
Attached Images
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File Type: jpg 20180920_162815.jpg (202.3 KB, 16 views)
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Old 05-28-2019, 02:31 PM   #10
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Again, not LiPo. LFP for fire safety.
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