OK all you sparkies out there, quick question. Work has a no longer used Powervar ABCE1440 UPS that I can have for real cheap, I was thinking of using this for backup for my pellet stove. First off, can it be used for this? If so, how long will it run say 200-300W worth of fans and such? I can twist pipe and butcher wood, electric and I do not get along. Some more specs: IN 120VAC 12.0 AMP MAX at 60Hz OUT 120VAC 10.6 AMP at 60Hz Power Rating 1440VA/936W. It could use some batts and before I invest in those I thought I'd check here first. Thanks!