One of the lessons Bob learned and now tries to tell folks is that your controller MUST be adjusted to TOP off your batteries or saturate them till they are at 100% charge and that also means a temp probe at the batteries. The factory set points of the controllers are set to low to get 100% charge. Measure your voltages at the batteries to figure around line loss and adjust the controller and follow the battery Manufacture recommendations for their battery. Tojan says 14.8v or more. A good meter is a must a Trimeteric 2025 and a 500 amp shunt at the very least their maybe Others?? compare the features but this one works great! Would you drive a car without a fuel guage? It will help trouble shoot most problems. Bob has batteries that are over 8 years old still going strong. EVERYBODY here has great experience to share. I am still learning. Charging batteries can be compared to airing up a tire. You will never air it up to 100 psi with a compressor that is set to 80psi and a 5/8 inch air hose will do it in less time then a 1/4 inch air hose. With as little as 5 Solar hours in winter time is important. Bob uses his system on one battery bank while it is charging and still gets to 100% charge around mid day. Also this is DC not AC and have different rules. Have a great day!!!
P.S. Buy made in the USA