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Battery Bank MisMatch

Wed, 08 Jun 2016 17:49:35 GMT

So. I totally get the appeal of cheap and simple. But, Having a 48VDC pack and a 12VDC pack for your motor seems like a strange long term choice -- from a charging and battery longevity standpoint. Admittedly, I don't know how your house batteries figure into things. But, a DC/DC converter would be a logical upgrade when $$$ and priorities allow. You can get [a normal one](http://www.powerstream.com/dc48-12.htm) (and a spare) for a few hundred bucks - or a [marine one](http://www.powerstream.com/dcdc-extreme-4812.htm) for ten times that. [I took the liberty of attacking your schematic with GIMP](static1.squarespace.com.jpg) to give you an idea what I'm talking about.

Wed, 08 Jun 2016 17:53:59 GMT

[fixed image](//muut.com/u/electro-beke/s2/:electro-beke:xUQG:refresh.jpg.jpg)

Sat, 18 Jun 2016 17:47:22 GMT

Yes, It is definitely on the upgrade list. Also a 48V inverter too. Once we upgrade LiFePO4 cells, we will go with a converter to run the house loads.

Sat, 25 Jun 2016 14:06:41 GMT

I really like the lithium iron phosphate chemistry. They seem much less prone to burning holes in the world than a lot of others. You should check out evtv.me - they have been using those batteries for years, mostly in auto conversions but they have documented several marine conversions as well.

Fri, 05 May 2017 18:56:48 GMT

These have been my goto for my 48vdc bank. We have an 11.5kw 48V electric motor https://www.amazon.com/uxcell-Step-Down-Waterproof-Converter-Transformer/dp/B01ENGOA4S/ref=sr_1_1?ie=UTF8&qid=1494010405&sr=8-1&keywords=48+volt+to+12+volt+DC%2FDC+Converter