In my opinion I would get an 80amp MPPT CC. That should allow you to get the full charging watts (~780w) from your panels whichever way you wire them for a 12V battery system.
The CC may get you about 65amps of charging which will be ok for a battery system rated between 520Ah and 780Ah. So depending on what those 6V golf cart batteries are rated, those 4 pairs wired in parallel should not exceed that 780ah.
That many batteries in parallel, leads to problems. Do you need 12V for something specific? otherwise, look at a 24 or even 48v battery bank.
55A @ 14V
28A @ 28V
15A @ 56V (These are the charging voltages for 12, 24 & 48V banks)
all are the same amount of POWER, but 15A wires are much easier to work with.
If no human is going to be working near the charge controller, I'd get the Midnight Classic, but it has some noisy fans.
If you are going to be working around it and don't want to hear fans, I prefer the Morningstar MPPT - 60
I have both, and both have internet capability
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
Let me clarify, all systems require 12volt, the batteries are in pairs so two are 12 volts times 4
I understand. Although you should also know that more than 2 sets of batteries wired in parallel can be a problem getting them to all charge and discharge equally. With 4 parallel sets you will more than likely kill off one or two early which will reduce the life of all of them.
I intend to equalize the cabling so that doesn't happen
keeping cables the same length is required but you still have slight resistance differences from connections etc as well as differences in internal resistance of the 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
You're entitled to your opinion but I will say, from experience that just using equal length cabling on 4 strings of batteries will not solve the unbalanced charging problem. You should get a DC clamp meter to monitor current going into each string. You may be surprised at the variation.
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