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Steve, I will go along with "ask an expert" and that philosophy. However, my problem with that is they want to sell you something, and many dont give out free advice. Expert advice that is... so you can get some school of hard knocks experience here.
My take. I have four 100A BB's on my boat. It has a 120 amp Balmar smart regulator. On my coach, I have two 100A BB's which I can charge via, genset, which typically delivers a laughable 30 amps for charging. My 6.7 Diesel has a giant alternator, it really smacks them and I can monitor its volts and amps easy. I have 750 watts of solar. All this and about 4 years experience with them. Still no expert here. Just my MHO.
However, BattleBorns have a pretty sophisticated BMS built in and trust me i have tested it. You cant over volt, over temp, charge when its too cold, etc. They will accept everything your alternator can throw at them, and say no when its too much, and even if it is a "dumb" one meaning no programmable regulator, it should handle the demand to get them up to say 85%. 200W of solar is going to maybe make 12 to 15 amps and only for about 4 hours a day. If you have any demand on your system you wont make any money charging them with a system that small.
Lithium batteries dont float. A Victron or Balmar sg200 are good choices.
BB's are plug and play. You just have take the risk with your wallet. I wouldnt have anything else. Your rig should be fine for them in the stock configuration.
Good luck
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