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advice on small 12V system??
I am planning on doing some weekend - 1 week coastal cruising (close to shore) on my 23 ' sailboat. I currently have a very simple 12V system, set up by the previous owner, with 1 fairly new marine battery (not sure if it is a deep cell or not - will have to check brand, etc), and a couple of very small solar chargers. I used the radio, GPS and depth sounder last summer without having them die/ lose power, but would like to use my laptop and chart software this year, with an inverter.
As this may exceed my battery reserves, when I need it the most, I would like to see how to best improve the system, for a modest price (ie a few hundred bucks)
The boat has a 20 year old, 7.5 HP Honda 4 stroke outboard, not set up with an altenator.
Should I add a second battery - if so would it have to be the same kind, deep cell or regular?
What about carrying a cheap 950W gas generator, that puts out 8Watts DC, to charge the battery/ies for a half-hour or so, if they get too low. I currently do not even have a panel /meter, to see what the charge level is!