Hi everybody , above is sketch of charging circuit on my boat (without breakers , fuses etc..)
I would kindly ask for some advice.Service battery is AGM and start and thruster normal lead acid high current batteries.
1) is it OK to use alternator(via argofet) and solar charger together(especially on AGM battery) ?
I am planning to add one more 220Ah battery in parallel for service and install more solar panels(about 500 - 600W in total)
2) is it OK to use same 3 years old battery with new one , or should i install both new batteries?
3)Would it be better to use GEL batt instead of AGM for service use?
4)I have to install higher power solar charger, should i charge only service batteries , is it mistake to charge start and service from solar?
5)Is it OK to charge GEL batt with alternator(via argofet) , or with alternator and solar together?
Thanks a lot for any help