Pellet stove battery backup on a budget What to do when nobody's home and your power goes out and the only thing that heats our house is a pellet stove... My wife and I are gone during the day and we have a African grey parrot in the house that shouldn't get too cold. Here in the northwest we have quite a few power outs during the fall and winter season. I do have a generator but have no funds to make that automatic. I've done a lot of research lately on power supply's as UPCâ€™s, Inverters, marine inverter chargers and battery backups in general. The one thing thatâ€™s most important is that the sine wave has to be pure. Electric motors donâ€™t like modified sine wave's and since pellet stove's have nothing but electric motors usually 2 fans and one auger motor and oh of course the delicate electronic control panel (Lopi manual states that you should plug in your 120v cord in a surge protected outlet) or better a UPS. I found a system online which is pretty much what I want â€œbehold the Surefire 502â€ http://www.medfordfuel.com/Surefire_Stove_Sentry.htm One of the problems is that it's ridiculous priced. With a Lopi pellet stove I would have to use the â€œ502â€ model which is $449 WOOW! Okay did some research on that model and come to find out that its a modified sine wave... Okay for that kind of money it should be ATLEAST pure sine wave right? BS! Dead end here... I'm a mechanic at a luxury yacht builder and checked around for an inverter charger with automatic switch for when plugging in a shore cord so like a UPS, cheapest I could find was around $400 pure sine wave of course. So dead end again.. Then I got to thinking hmm if I use a APC UPS with a bigger battery? I asked the electrician at my work and he mentioned well the idea is good but what if the small battery charger can't charge the bigger batteries and fries itself? I thought I can't stand it but he's right DAMN! another dead end... Then when I was reading up on the forums here someone mentioned butkus.org that guy had done what I initially wanted to do and it worked YEAH! Okay now were cooking! I went to Craigslist and Ebay and searched for a UPC which is powerful enough to run my pellet stove (350 watt) I settled for a 980 watt APC SUA1500 bit bigger than I need but Iâ€™m sure under long load it won't over heat! For $100 + $25 shipping we got it home and I got to work in the mean time I found some cable at work from a restoration job we had and a little piece of richlite for the connector (on the front of the APC) and for the batteries we had a boat in our yard that the owner wanted new batteries and the old ones in my opinion werenâ€™t that bad yet So 2 8D batteries some cable connectors zip ties and a APC UPS Iâ€™m ready and it works like a charm, when I unplug the 120V the pellet stove keeps just running like nothing happened. I have had it running for 1.5 hours with no problems, Next weekend when Iâ€™m home I'll try as long as it goes.