I have, what is probably a simple question, but I just can't seem to work it out. I have the following items for a small solar setup for charging a deep cycle battery while at my off grid cabin. NPower Amorphous Solar panel - 20W X 2 (Sunforce Solar Power Kit — 60 Watts, Model# 59050 | Battery Backup Packages| Northern Tool + Equipment NPower Solar Charger 127.5W, 8.5A (NPower Solar Charge Controller — 127 1/2 Watts, 8 1/2 Amps | Charge Controllers| Northern Tool + Equipment When charging the battery from a standard 120v battery charger I read 13.x volts on the battery, but when running from the solar panels I see the voltage stays at whatever the battery is currently at, say 12.5vdc I have verified that the charger is putting out 13.x volts, as the cut-in voltage is 13v. Using a small adjustable DC powersupply set to 13.5VDC I hooked up the system system and verified that the input into the charge was 13.5, output from the charger was 13.5 when not connected to the battery, but dropped to battery voltage when hookup. Is this right? I left the setup go for about an hour and did notice that the voltage at the battery increased by .3v So it appears to be functional. So am I worrying about nothing, or should I truly be seeing 13v? One more question. When charging the battery, and there is a load on the battery, should the charge controller be fused so that the load doesn't try to pull too much power from it? My thought is the controller can provide only so much power, and if the load requires more then it would "come from" the battery. Essentially if the charge controller was actively charging the battery with no load then all power is being put into the battery. If a small load is applied the amount of charge going into the battery is reduced and finally if a load on the system exceeds what the charge controller can output the battery will supplement it. Is this correct? Thanks in advance.