I have been living off grid w/ batteries for a year and a half, but this winter we've had a few long runs with very cloudy skies. So for the first time I had to fire up my generator to bring the batteries back up to full charge. My installer told me 1-2 hours with my generator should take my batteries from 50% back up to mostly full, but I ran it for two hours and my voltage was 24.6 to 24.8 Not bad, but I was expecting more. This was what my panel was reading during the charging (http://imgur.com/X0BdbE0) My question is, does this seem about right? How could I calculate how long it should take? Also after finishing charging, my batteries seemed to drop voltage a bit faster than normal once I started using them with lighter than normal use, could there be something else going on? I just topped off the batteries a week ago with distilled water. System details * (9) Canadian Solar CS-6p 250 Watt Poly Black Frame (Spec Sheet) * (1) Schneider SW 4024 (Spec Sheet) * (1) Schneider MPPT 60 Charge Controller (Spec Sheet) * (8) Trojan L-16 6v 370 AH Flooded Lead Acid Batteries (Spec Sheet) * (1) Schneider System Control Panel (Spec Sheet) * (1) Schneider Interconnect Panel (no spec sheet) * (1) Midnight Solar MNPV 80AMP Dinrail Breaker (Spec Sheet) Generator Details * Troy Bilt Brigs and Straton 6,250 generator Model #: