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Honestly, as long as you are simply maintaining the battery, just about anything should do the float work for you. It does not take much to keep the batteries full.
For charging, I would size the charger for normal recharge at battery size in amp-hours divided by 20.
So, 200 AH of storage, charge at 10 Amps. Also a 3 stage or 4 stage charger is the best, which reduces the current as you approach 14.4V on a re-charge.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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