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WetCoastCabin
Member
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# Posted: 19 Aug 2018 13:39
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Hi there! I bought 8 6V 200amp hr Costco deep cycle batteries 2 months ago, and need to buy 8 more. They have been hooked up to be a 12V battery bank and charged via a 40amp solar charge controller hooked up to 2 x 250watt panels. I hooked it up to get started and learn about solar, so I've only actually used the batteries maybe 4 times in the last two months. I want to move to a 48v system. My main question is what type of battery do you recommend I buy and would it be ok to combine my original 8 batteries with the 8 new ones? Please say yes.  Worried that even adding batteries even after 1 day of use removes the ability to combine batteries of different ages? How strict is the battery combining requirement they are the same age? Thanks in advance!
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FishHog
Member
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# Posted: 19 Aug 2018 19:03
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It’s not ideal but sounds like yours are new enough that it won’t be a problem. I’d do it. That being said that sounds like an awfully big battery bank compared to your solar. Do you really need that much capacity?
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WetCoastCabin
Member
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# Posted: 19 Aug 2018 19:50
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Thanks FishHog! I have 14 more 270watt panels I'm going to set up soon. Roughly a 4k system. I need lots of juice to run two well pumps (one in the well one in a storage tank) that are 1/2 horsepower pumps pulling 3000 watts on startup and 240volt. I'm also trying to source a good inverter for this setup. Researching AIMS, MagnaSine and Schnieder and would love any advice on that front.
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FishHog
Member
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# Posted: 20 Aug 2018 09:28
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Ok that makes sense now. I’ve been researching inverters although smaller for my camper van and am heavily leaning towards the aims but I don’t think you will go wrong with any of those
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ILFE
Member
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# Posted: 20 Aug 2018 13:20
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2 strings of 48 volts batteries will be much better than 4 strings of 12 volts batteries. And, two months won't be much of an issue.
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Atlincabin
Member
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# Posted: 20 Aug 2018 16:00
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We have a Magnasine inverter (4kW) at our cabin. 5 summers full-time there and it has worked flawlessly. I run most everything I need from it - water pump, table saw, washing machine, and even the occasional light bulb! Just a data point for you.
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