Charging from alternator and solar

StitchExperimen · January 2020

I have a solenoid mounted to the firewall on a 2005 Dodge Grand Caravan SE. Do I need to have a shotkey diode? I put in a 880 cca AGM battery an a new 160 amp alternator. I had 2 6v lead acid batteries and am upgrading to 2 6v 210 ah AGM deep cycle batteries. I'm going to put as much solar panels panels on the roof as allowed with the help of Arizona Wind and Solar. I don't know what charge controller to use, any suggestions? Can I hookup the charge controller and the alternator directly to the house battery at the same time? If I need a shotkey diode how do I hook it up?
Thanks,
Bruce

-

mike95490 · January 2020

Throw the word DIODE out of your vocabulary. It will do nothing but ruin batteries

You don't use a solenoid - except for your starter motor.
using a solenoid will weld the contacts in a short time. Batteries can dump hundreds of amps in a few seconds thru a set of contacts

You need a Isolator, A diode reduces the charge voltage to a battery and the battery NEVER fully charges

You use a dual battery controller like this. Or a solid state Isolator.

http://www.balmar.net/products/digital-duo-charge/

papab · January 2020

I agree w mike, don't use a shotkey diode. I use a Blue Sea automatic charging relay (ACR), and a manual switch. You do want to be able to disconnect the engine batttery from the house battery when solar charging sometimes. There is probably a simpler solution than mine. I don't see the value in that balmar product.

I had a bogart engineering trimetric charger, but it didn't hold a steady voltage. I like the Victron SCC that I have now much better. Get a battery monitor too, Victron probably makes them.

Charging from alternator and solar

Comments

Categories