instead of adding 12V batteries in parallel. if Golf Cart 6V 200ah batteries are available in your area, batteries in series are a better way to build capacity than parallel.
There is some math here - http://www.smartgauge.co.uk/batt_con.html
4 6V batteries in a 2series, 2 parallel arrangement, wired on the diagonal, is a better method that 4 parallel batteries.
Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A