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Anyone testing cold weather preps?
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<blockquote data-quote="1krr" data-source="post: 2684817" data-attributes="member: 750"><p>They only pull 110 watts at full speed. Inverter is 85% efficent so draw should be just a hair north of 9 amps to start and pick up as the voltage drops. It's running off a pair of golfcart batteries rated at 232ah in series so plenty of amp hours to test with. The only thing is that it's a modified sine wave inverter so it will setup some harmonics in the motors (ac induction motors) but they are low torque with decent windings so it won't hurt them. This is just to test a wind/solar scenario if we lost power and had no access to fuel (iced in, shtf, etc). </p><p></p><p>I did a little experiment like this once on a really cold night with the geothermal unit off and just the blower fan to circulate. With a single charge of hardwood, we brought the house from 68 to 70 (too much of my tinkering with input air and damper settings) and if I remember right, it dropped back down to 68 overnight. The house is really tight and with the concrete walls, the interior temps don't like to move very quickly. Since we keep the house at 69 when people are here and 67 when gone or sleeping in the winter the mass of the walls really works to hold the temps in place. Anyway, below is a link to the fireplace we are using. It's not quite as efficient as some of the catalyst fireplaces but since it just uses reflection and a secondary chamber, there is less to go wrong with it.</p><p></p><p><a href="http://www.kozyheat.com/product/231zc" target="_blank">http://www.kozyheat.com/product/231zc</a></p><p></p><p></p><p></p><p>I'm using one of the 750 watt units for this test. Like I said above, modified sinewave but I've run a miter saw and circular saw through 2x4s with it off the truck and got it for 38 bucks on a sale+discount day. For the money, there is none better! My next one will be a pure sinewave unit. </p><p></p><p>I might have the same generator as you. I've got one of the large frame John Deere portables (9kw peak and 6.2kw rms iirc)? Anyway, it's a good unit. It will run our typical loads and the geothermal if I'm careful.</p><p></p><p>I appreciate the advice and I"ll let you guys know how it works out. Mostly the cold weather is hurting my cedar killing spree so I had to do something useful with the time. <img src="/images/smilies/wink.png" class="smilie" loading="lazy" alt=";)" title="Wink ;)" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="1krr, post: 2684817, member: 750"] They only pull 110 watts at full speed. Inverter is 85% efficent so draw should be just a hair north of 9 amps to start and pick up as the voltage drops. It's running off a pair of golfcart batteries rated at 232ah in series so plenty of amp hours to test with. The only thing is that it's a modified sine wave inverter so it will setup some harmonics in the motors (ac induction motors) but they are low torque with decent windings so it won't hurt them. This is just to test a wind/solar scenario if we lost power and had no access to fuel (iced in, shtf, etc). I did a little experiment like this once on a really cold night with the geothermal unit off and just the blower fan to circulate. With a single charge of hardwood, we brought the house from 68 to 70 (too much of my tinkering with input air and damper settings) and if I remember right, it dropped back down to 68 overnight. The house is really tight and with the concrete walls, the interior temps don't like to move very quickly. Since we keep the house at 69 when people are here and 67 when gone or sleeping in the winter the mass of the walls really works to hold the temps in place. Anyway, below is a link to the fireplace we are using. It's not quite as efficient as some of the catalyst fireplaces but since it just uses reflection and a secondary chamber, there is less to go wrong with it. [url]http://www.kozyheat.com/product/231zc[/url] I'm using one of the 750 watt units for this test. Like I said above, modified sinewave but I've run a miter saw and circular saw through 2x4s with it off the truck and got it for 38 bucks on a sale+discount day. For the money, there is none better! My next one will be a pure sinewave unit. I might have the same generator as you. I've got one of the large frame John Deere portables (9kw peak and 6.2kw rms iirc)? Anyway, it's a good unit. It will run our typical loads and the geothermal if I'm careful. I appreciate the advice and I"ll let you guys know how it works out. Mostly the cold weather is hurting my cedar killing spree so I had to do something useful with the time. ;) [/QUOTE]
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