First night with Solar charged Batteries

So last night was the first night testing our new 400 watt Renogy eclipse premium kit, 40A cammander cc, 4 6 volt interstate 120ah flooded batteries  with a switch to run one of two batery banks or both. Wired in series and parelel, Panels are wired in parelel. Also a renogy 2000 watt inverter/charger. All custom made cables. I bought this kit planning on installing it myself on our 32' 5th wheel, but do to a back surgery that went bad and led to a total of 3 surgies last Jan. I had to have Pats RV in Petaluma Ca. do the install for me. Mike and Christen are the owners and the only Renogy dealer I know of in Sonoma County? Anyway I had all my own equipment and he installed it. I can't say enough about his work, it looks so nice and clean. ( I tried posting pictures but I can't fiqure out how ) I backed it into the drive way yesterday about 3:00 and my wife and I got to play with it. Everything in the trailer is wired to the solar system, which was more then I expected, or thought I needed but it is nice. And with the built in transfer switch in the inverter it's a nice transition to shore power. So I found out what different amp loads on different things in the coach, My ceiling fan uses 4.4 amps, two old bulbs (I think 60 watt each?) that I hadn't switched to LED yet used 2 amps, and two 60 watt LEDS only used 0.4a All of these numbers I was getting off of the MT50 monitor that came with my kit. It was nice looking at the Volts and amps from panels to CC and on to the batteries. and watching the amps rise when turning things on at different times. With everything unplugged TV'S DVD's everything including inverter OFF I have a 0.07a loss not bad for a 32' 5th wheel. So around 6:30 to 7:00 as I was playing with the monitor and it showed my Batteries had gone down to about 12.7 volts. Which kind of worried me, I felt like it was to low to fast?? But this my first solar ever. So I turned on a 26" LCD TV a dvd with a movie 4 60 watt LED lights. My read was 12.5 volts now and completly dark outside. So I knew with me and Shelley using everything at the latter part of the day I didn't start the night with a 100 full bank. So abot 11:00 last night I went out the TV, DVD and lights were still on now the read was 12.6, It went up. So I went back in the house and like a kid on XMAS eve I don't think I slept at all. 6:00 AM today I throw on my robe and tripped over the sleeping dog. I opened the door and the lights TV DVD were all on 
Monitor said 12.5 volts so I got out the Mr. Coffee filled it with cold water and made a full pot of coffee, while the coffee was brewing it dropped too 12 volts, when it was done it went back to 12.5 volts. Now though my monitor does not show power usage?? Yesterday and last night it would show me how many amps were being used. but now it shows 0.01?? I guess I'll be calling customer sup. And something I missed when buying the 2000 watt inverter is there is a minume AMP draw in order to make it turn on when it's in auto. So my cpap won't turn it on unless I'm running something else. But so far I think I love it.
Mel