I'll warn you now, I am going near-mad trying to decide on what maintenance-free batteries to go for to replace our SLAs. I'm getting completely conflicting reports on battery types and their performance so I figured liveaboards are probably the best people to ask.
According to the figures, gel batteries appear to be the most obvious choice for a liveaboard. Their longevity is second to none, yet I am told I should be looking at AGMs. However according to the West Marine catalogue, AGMs can only be deep cycled 300 times, versus gels which can cycled 1,000 times.
The ever polite and comprehensive Charles Sterling said this of gels:
Having recentlly bought one of his products I was very grateful for this really useful insight.i would not use gel batteries as the are over sold, expensive and useless
Assuming I have a comprehensive charging system and ensure I don't over-charge them, what is the reason not to go for gels? Someone on PBO has just told me he's done 12-15 years on his gels. Doesn't that say it all?