Some battery facts: 1. Flooded lead acid, AGM, gel, and lithium batteries all have different charge voltages and resting voltages.
2. If you connect different types together, one of those types won’t be charged optimally. 3. If you connect different types together, the one with the higher resting voltage will discharge into the one with the lower resting voltage. 4. Lithium batteries are the best in every way but price. They need a specialized charging and management system as well that isn’t cheap. 5. Gel batteries last longer than AGMs, but they are not as easy to find and are quickly killed by overcharging. 6. AGM batteries are easier to get and are quickly killed by undercharging. 7. The cheapest way to get deep cycle batteries – by far – is to buy golf cart batteries. 8. East-Penn Deka makes gel and AGM batteries for West Marine. They also make GRP 31 AGMs with a private label for Sam’s Club that are the exact same battery for half the price. 9. Adding more batteries and doing nothing else only helps for a weekend. Once you are out long enough to run them down, you need a way to charge them faster than the stock system or you just trade frequent engine use in for less frequent but longer engine use. 10. Solar + LEDs helps *a ton*! Joe Coquina C&C 35 MK I
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