1.Could I connect this to a Charge controller? (Eg this one -
http://www.iallpowers.com/index.php?c=product&id=371) And use it to charge a 12v lithium battery?
If yes ... what connector would I need to connect it to the charge controller?
Yes, you can pair the panel with controller or no controller, that is OK. A panel greater than 15W should chain with a controller to prevent from overcharging issue.
Normally there are 6 screw-down screws for tightening the cable, you need no extra connector actually.
One thing we should remind u first, for lithium battery, please check the manual to select the proper batteries type for pairing the battery system before the operation.
B01=LEAD-ACID 12V
B02=LITHIUM ION 3s 3x3.7V=11.1V
B03= LIFePO4 4s 4x3.2V=12.8V
The default setting on our controller is for lead-acid battery(B01).
2.Is the panel waterproof? Could i hang it on the roof of my mini caravan?
Some raindrop is OK, but the back circuit board is coated with rugged polyester canvas which is same as the coating on most outdoor backpack. (For outdoor use, make sure you have added an protective closer with high light transmittance.)
3.Should I keep it plugged it for day and night?
A blocking diode is included to prevent reverse charging from battery so it is OK to leave it plugged day and night.
However,one thing we need to remind you: pleae do remember to remove/disconnect it before starting you engine or driving every time.
Electrical surges from the car engine when starting and running may damage the diode inside, or you may need to pair your system with a solar regulator to better protect your battery from draining.
Trips: It is suggest to mount the panel on the central of vehicle’s window (Do avoid UV protection area)so that you won’t forget to disconnect/remove it before starting cars.