Solar Powered Battery Charger

[BigV]

I picked up a 5 watt solar charger to use for my deep cycle batteries. I use the batteries to run my pellet stove during power outages. Can anyone tell me how efficient these are? If I use a converter and burn a 60 watt bulb for 4 hours, how long would (should) it take to recharge the battery using a 5 watt solar panel? Would there be twice the charge rate if I used 2, 5 watt panels at the same time?
Thanks!

 

[lecomte38]

5 watts is a trickle charger. 60w @ 120v = 600w @12v. (forget the inverter efficiency loss) 600 w per hour x 4 hours = 2400 w/h
2400/5w= 480 hours to recharge. That doesn't seem right ??? math or physics error??? How long will a large (220 ah) deep discharge battery operate the average pellet stove thru an inverter??

 

[BigV]

How long will a large (220 ah) deep discharge battery operate the average pellet stove thru an inverter??

My pellet stove runs on 110 and has 2 motors one is the blower motor the other is an exhaust motor.. If the power goes out it will run for about 90 minutes. I usually run it for an hour and then shut it down. My stove takes about 10 minutes to cool down and shut off.