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Re: How to connect alternator, solar and shore power to batteries?
I am certainly no expert on this subject, but have an interest in these things and my opinion there is no one right way to wire the various inputs to your batteries. You could tie everything into the isolator with no problem - may need to connect to a positive bus first to avoid terminal congestion at the isolator. You could also tie the solar and house charge inputs just to the house bank, and let the alternator charge the start battery when it's running. A lot depends on your personal preferences.
For example, my boat is set up with no isolator, and all charge sources go to the house bank. An Echo charger feeds the start battery. This keeps the banks effectively isolated and the both the house and start battery banks charged well. I haVe an on - off switch for the house bank, and a separate one for the start battery. An emergency switch allows me to use the house battery to start the engine in an emergency.
Make sure if you send all charging sources to the isolator that you size the wires from the isolator to the batteries for the total combined current from all of the charge sources.
S/V Everlasting Moon
1981 Endeavour 32
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