Charging Dual Battery System on Trailer with Single Charger and Solar Option

Question:

I am wiring up 2 12 volt batteries for a 12 volt system on my small hard side camper. I plan on setting up a buss bar to allow me to wire up the charger as well as a solar system then feed to a disconnect to cut off the rest of the trailer when parked. The question is, can I use this charger to charge the 2 batteries at once through the buss bar? Thanks

asked by: Eric

Expert Reply:

I recommend you start with the Deka 2/0 Gauge Overmolded Battery Cable Harness Assembly - Black - 7" Long # DW04363 and Red # DW04362 to connect your batteries. When wiring them as you have indicated in parallel, you will be able to easily charge the batteries simultaneously through the Buss Bar when using a charger like the CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance # CTEK56353.

You may be interested in the Redarc BCDC Dual Battery Charger # 331-BCDC1240D. This will allow your vehicle alternator or a solar panel to charge your batteries.

expert reply by: Jason S

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Paul H.

5/13/2020

What size charger do I need to keep the marine batteries in my boat charged? The 12 volt batteries are rated at 550 cranking amps and wired in parallel. 120 Volt shore power is available.

Chris R.

5/15/2020

To really charge those batteries up, I recommend charging them each individually instead of keeping them wired in parallel during the process. For the 12V batteries on your boat the NOCO Genius # 329-GEN2 will work really well. It features a 2-battery bank so both can be hooked up at once.