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keep 12 volts


raylen

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I always get mixed up. When joining two 12 volt batteries together, how are the cables hooked up to keep 12 volts.

Thank you in advance.

SKP 98010
1990 Bounder 27D by Fleetwood
Ray and Elen living this beautiful life style and exploring this beautiful country

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plus to plus and minus to minus the-correct-way-to-connect-two-batteries

2000 National RV Sea Breeze 5th wheel 30ft.

So.California

1950 F1 street rod

1949 F1 stock V8 flathead

1948 F6 350 chevy/rest stock, no dump bed shortened frame.

1953 chevy 3100 AD for 85 S10 frame

1968 Baha Bug with 2.2 ecotec motor 170 hp, king coil-overs,etc

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1998.5 Dodge 2500 4x4 Cummins, turbo, trans, injectors, lockers, bigger turbo,edge EZ upgrades for towing 35" BFG's, air dog lift pump etc.

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As shown wiring two 12 volt batteries in parallel maintains the same 12 volts, while the available Amp Hours of energy storage is additive. In series (like two 6 volters to make 12 volts) voltage is additive but the Amp Hours IS NOT. When combining batteries its best if they are identical in age and type and brand, size and rating. For RV use I recommend true deep cycle (golf cart type) batteries versus the cheaper semi deep cycle so called RV Marine Batteries like sold at Wally World for boat owners.

 

John T

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While its the simplest form, ONLY two batteries wired in parallel, as Ed G's picture correctly shows, note that POS terminal of Battery B connects to the charging unit and loads while the NEG terminal of Battery A connects to Ground. THAT IS CORRECT AS OPPOSED TO the POS and NEG of only one battery being used, which although it would still "work" DOES NOT YIELD AS GOOD BALANCE AS IF WIRED PER ED'S PICTURE !!!!!!!!!!!!!

 

For a more detailed explanation of proper battery parallel wiring see http://www.smartgauge.co.uk/batt_con.html you wont believe how much of a difference it can make.

 

John T

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