Our Link 2000 Monitor alternates "lo battery E-04" with the Amps, Volts, A Hours and Time displays for both battery banks. Its been reading between 12.40 - 12.45 volts for both the 3 8d gel cell House batteries and the 3 Engine batteries all day. We drove 350 miles yesterday and hooked up to 50 amps when we arrived at our son's house last night. The Link's red charge...