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post #41 of 45 Old 03-16-2011
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The values I was just taking from what I could find reported by others.

Anchor lights:

Anchor light w/photodiode opinions/options, battery draw

"20 watt incandescent bulb and it drew 1.7 amps per hour"

Anchor Light Replacement - SailboatOwners.com

"Our amp draw went from 2 amps to .2 amps"

So I was guesstimating around 1.5 per hour. Interior cabin lights I was rating at 1 amp per hour of draw for non LED.

I don't think those are too out of line, but could be off and again, it all depends on how you use it.

Was your Catalina inboard or outboard? Any chance you had an alternator charging the batteries when you were motoring?
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post #42 of 45 Old 03-16-2011
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It was an inboard, 30-HP Universal Atomic -4 gas, 100-amp alternator. It charged the batteries in no time at all.

Gary
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post #43 of 45 Old 04-06-2011 Thread Starter
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I did buy the Solar Force 15watt solar panel at west marine for about 70 bucks. and another 25 for the controller.
I have not installed either yet, will keep you updated.

BUT.... after spending 2 nights on the boat, and off the shore power for 2 weeks now - both batteries are still 'full'. maybe the 15watt is overkill, but cost/watt is better than the 5 watt trickle charge.
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post #44 of 45 Old 04-06-2011
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Quote:
Originally Posted by SpcAlan1 View Post
BUT.... after spending 2 nights on the boat, and off the shore power for 2 weeks now - both batteries are still 'full'. maybe the 15watt is overkill, but cost/watt is better than the 5 watt trickle charge.
Also, margin of error. You won't regret it.

s/v Laelia - 1978 Pearson 365 ketch
s/v Essorant - 1972 Catalina 27
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post #45 of 45 Old 04-06-2011
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When it comes to boat stuff, there's no such thing as overkill! Kinda' like having too much fun--oh yeah.

Good Luck,

Gary
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