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Old 21 November 2012, 12:11   #11
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so if i was having 2 batteries onboard then go for 2 85ah batteries if chandler reccomends no less than 85ah single ? take point on waterproof/marine vsr but im sure id be able to fabricate weatherproof box out of ali n tig weld it up to help keep moisture out.....
Anybody any clues to what output alternator would be on my yam 90hp
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Old 21 November 2012, 12:48   #12
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Anybody any clues to what output alternator would be on my yam 90hp
I'm guessing but maybe 50 or 60 Amp at max output. Never likely to get this much charge going into the batteries though as the flatter they are the higher their internal resistance.
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Old 21 November 2012, 13:18   #13
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cheers erin, kind of all making little bit sense now, i like to look into thing n gain folks knowledge and research it before buying just want to make sure never loose power out there and have my pals down local rnli have to tow me back just because of dead battery haha, watching vsr on ebay ends later so may go for it
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Old 22 November 2012, 05:48   #14
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take point on waterproof/marine vsr but im sure id be able to fabricate weatherproof box out of ali n tig weld it up to help keep moisture out.....
Ally, DC current, & seawater have never been a good mix
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Old 22 November 2012, 12:30   #15
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Ally, DC current, & seawater have never been a good mix
weld ali boats everyday mate its me job, in water too
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Old 22 November 2012, 12:45   #16
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weld ali boats everyday mate its me job, in water too
Fair do's, but those ally hulls by their very nature are grounded so all the stray currents are earthed. If you stick your ally switch box on the transom (GRP) just make sure it's well bonded to earth or it'll start to fizz eventually. The inside will get salty & damp which will allow stray voltages to track from the +ve 12V from the switch & before you know it the whole box is somewhere between 0 & 12V which will try & earth itself. You need to make sure that the switch, cables & terminals are well sealed & insulated.
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Old 22 November 2012, 12:52   #17
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So would you be inclined to use large junction box even inside console?
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Old 22 November 2012, 13:21   #18
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So would you be inclined to use large junction box even inside console?
Yup, every time. My isolators are mounted in an IP65 box inside the console & the terminals are coated in silicone grease. They are still pristine after 4 years.
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