If your batteries are in series and not being charged by a multi-bank charger it is recommended that you fully charge the batteries individually once a year. This will balance out the entire battery bank to ensure the batteries will reach its expected life span.
Nobody ever expects a battery to fail, but if one does (bad bms), it's possibly a bonus if your battery bank configuration can be reconfigured with less Ah, vs being dead in the water while a battery is being warrantied out.
Nobody ever expects a battery to fail, but if one does (bad bms), it's possibly a bonus if your battery bank configuration can be reconfigured with less Ah, vs being dead in the water while a battery is being warrantied out.