The rule of thumb I have seen suggested is SWAG at 5 hours a day of full output. So if it is say 3 amps peak output you might see 15 amp hours a day back into your battery on sunny days.
LEDs are easy to keep up with if not too many or too long. laptops can be power pigs - just look at the size of the power supply in watts - up to 220 watts for some (vs 45 in solar). If you crank the speed and backlight down they can be manageable. Water pump uses a lot but may not run long.
If what you have is working for you now, this could extend your stay a bit.
One thing I like about this set up is when you outgrow it, it can transform into 3 individual battery maintainers.
There are a lot of options these days in systems for $150, though when you add in shipping costs the options do narrow quickly.
Jim
