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Continuous solenoid and solar panel together for charging house battery.
The charge line coming from your van start battery to the secondary house batteries can be considerably lighter in size.
But solar panels are rated in watts so some simple conversion math is needed.
When charging batteries with solar energy one should use a controller when the rated amperage of the solar panel is above 1 of the battery capacity.
How to wire the solenoid start battery and secondary battery bank.
Discussion starter 1 oct 15 2013.
Solar battery charging basics.
I recommend 10 awg wire run from the positive terminal of your start battery to the continuous duty solenoid.
I found this useful.
I just upgraded to a 120watt panel and 30a solar charge controller.
For example if your aux battery bulk charges as 14 4v but your alternator is only outputting 13 7v you won t be fully effectively charging your aux battery.
Although convenient to switch the solenoid with the vehicle ignition there may be times where it is beneficial to do so with a separate switch inside the vehicle.
Mayspare 80 amp relay 12v continuous duty solenoid relay battery isolator and relay white rodgers high current starter relay 4 pin spst 3 9 out of 5 stars 73 17 80 17.
Joined sep 25 2013 40 posts.
Solar charge read more.
I have an auto battery for my main battery.
The vehicle chassis battery is typically an automotive type of battery that provides high cranking amps to start the engine.
There are two large terminals on the solenoid.
I would only add one thing.
08 04 2016 03 46 pm bcbullet wrote.
Use a solar panel to charge your battery.
I had a 40w solar panel for charging my batteries with a 7a solar charge controller.
You would need to think about whether you want control over tying the two sets together such as whether you wish to charge the starting battery with the house system.
This means the solar panel each day will have to supply 1 percent of the battery s total amperage to maintain full charge.
Configured solar panel or the charge controller kits that can help ensure that your components will work well together.
Adding a dc dc charger would boost up the 13 7v coming from the alternator to a higher voltage to better charge your aux battery.
Dual battery charging continuous duty solenoid.