Originally Posted by JDCAVE
Kevin: I have heard some people have had difficulties with the Surette Rolls Batteries. Twisted Tree has commented on issues he had with Surette Rolls batteries and I am aware of someone with a KK42 that had charging issues as well. Apparently the charging parameters are different from other similar batteries.
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I had a set of four big Rolls 8 volts as the main house bank on my boat and they were outstanding. Charged up perfectly using a "old fashion" Sentry charger and simple alternator.
If you go the two volt modular route, talk to their tech support and make sure you have the right charging system and parameters. I knew an extensive cruiser who had twelve years on his 2v and they were still going strong; best warranty I know of in the business as well.
If you are trying to stay at a certain weight, ultimately it is a zero sum game with batteries, as capacity is inevitably directly correspondent to weight. I went with the L16's because I had plenty of height available, so get more capacity in a smaller foot print while being very easy to check and service.