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Old 09-27-2017, 02:19 PM   #9
gmc
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Brand: Thor Motor Coach
Model: Hurricane 32A
State: Florida
Posts: 1,873
THOR #2829
Quote:
Originally Posted by Peterrrr View Post
Your house and chassis batteries are already connected together. You would only need one solar charge controller normally connected to the house terminal post of your coach. Your battery positive is connected to this.

I agree with John that 100 watts would be needed.
In a properly functioning system, the house and chassis batteries are ONLY connected when in 'USE' with one of the engine, generator, or shore power providing voltage to the system.

The BCC or BIRD/Trombetta depending on the rig provides the connection/isolation.

Solar connected to the house batteries with switch in STORE will only charge the house batteries.

A good chassis battery should be able to go a month or more without an issue or charge.
A proper STORE setup should as well for house batteries... but many find it easier to leave on charge of some sort or add an additional disconnect than spend the time finding the improper draw.

My rig was unplugged and in STORE from July 12 (return from trip) till September 9 (fired genny then engine to exercise in prep for Irma...) All batteries were fine. No extra disconnects in use.

As for how much current you need - measure the draw when in STORE - that draw over 24 hours is what you need to replace at a minimum in daylight hours with solar... And of course not all days are sunny. Not know what is actually still 'on' in your rig makes it difficult to estimate.
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Greg
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)
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