When you hook up your system, pull your main 30 amp fuse by the batteries or if you have one turn off your battery disconnect switch. This will eliminate the loads from inside the TT.
I looked up the specifications on that Coleman 30 watt PV panel and it shows a voltage of only 12VDC. I could not locate any max voltage for this panel. If it is only a max of 12VDC, then your batteries will not be topped off, as fully charged battery is 12.6VDC and be able to keep the battery 13.2VDC. A SOLAR panel that is used to charge/keep topped off, needs a max voltage of 17VDC.
As for what SOLAR battery charge controller there are a few different ones depending one what you plan on accomplishing.
- If you do not plan on adding any more SOLAR than I would just go with the basic
Sunforce-7-Amp-Solar-Charge-Controller model for around $18. It protects against overcharging.
- If there is a chance that you may decide to add additional SOLAR in the future you may want to invest in a
Renogy 30 amp PWM model.
When you get the SOLAR panel, see what the Max voltage is.
I added a couple pictures below
Don