Mistroma
Well-Known Member
I have 6 of these for my domestic system, no complaints after 12 months hard work, 9 of which at anchor with 2 power hungry teenagers; most of time relying on solar power for charging.
http://www.trojanbattery.com/products/SCS22512V.aspx
Did you get a DOD graph from Trojan (see example in post #7)? The 12V models I looked at all seemed to quote CCA for engine starting and were around 50-60% more expensive with only 50% expected life.
T105 x 2 = £235 for 225Ah
SCS225 = £211 for 130Ah (equiv. to £365 for 225Ah)
Only down side was having to re-build the battery box to cope with taller 6V batteries.
N.B. I'm not taking Trojan's graphs as gospel. They will have carried out the comparisons under ideal conditions. e.g. Controlled drop to n% and almost immediate re-charge to 100% at correct temp., volts, amps. I doubt a cruising yacht would get close to the cycles they quote but they do allow comparison (and more information than you get from most manufacturers
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