Portable suitcase solar panels

[ekirkland]

I looking at getting a 100 to 130 W suitcase solar panel top off dual 12v batteries while dry camping and have some questions:

1. do you connect to the 7-pin trailer cable or attach wires directly to battery with SAE or other terminals?

2. if attaching directly to the battery, do you just connect to one battery or both?

3. get one with a 10 Amp voltage controller or go with 20 Amp?

4. looking at Renogy, what is the difference between the regular Monocrystalline or Eclipse?

Thanks!