jackb_ms Posted August 17, 2021 Share Posted August 17, 2021 Hello AllI'm working on a battery box Mk2 for a electric outboard motor.The electric outboard requires a 12V DC supply, at maximum power it will use 30Amps. It's very rarely used at full power.I'm thinking of using a 24V battery and use a voltage reducer to drop it to 12V.If the battery has a capacity of 100Ah at 24V dc as I am reducing the voltage to 12V does it mean the battery will have a capacity of 200Ah at 12V ignoring the efficiency of the voltage reducer? CheersJack Link to comment Share on other sites More sharing options...
Jonathan Kay Posted August 17, 2021 Share Posted August 17, 2021 "If the battery has a capacity of 100Ah at 24V dc as I am reducing the voltage to 12V does it mean the battery will have a capacity of 200Ah at 12V ignoring the efficiency of the voltage reducer?"Roughly yes.What reducer are you considering?Jonathan Link to comment Share on other sites More sharing options...
jackb_ms Posted August 17, 2021 Author Share Posted August 17, 2021 Hi JohnathanThanks for the answer.I was thinking of DC step down converter, something like this one:https://www.ebay.co.uk/itm/333975247309?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D233199%26meid%3D4a5f8c8cffc04f38bcec788f29e9a74d%26pid%3D101224%26rk%3D3%26rkt%3D5%26sd%3D203555790748%26itm%3D333975247309%26pmt%3D1%26noa%3D1%26pg%3D2047675%26algv%3DDefaultOrganic&_trksid=p2047675.c101224.m-1Jack Link to comment Share on other sites More sharing options...
Jonathan Kay Posted August 17, 2021 Share Posted August 17, 2021 Thanks.What's the advantage of doing it that way rather than using a 12V battery (or several) and avoiding the DC converter?Jonathan Link to comment Share on other sites More sharing options...
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