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Post by iamnobody on Dec 2, 2021 15:05:19 GMT -6
What You Can Power With A Solar Panel
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Post by papaof2 on Dec 2, 2021 17:26:38 GMT -6
Good starting point for asking questions. Remember that the guy in the video is talking about solar power for immediate use - only while the sun is shining. If the day is partly cloudy, your mircowave oven might stop halfway through cooking the popcorn or burrito, unless it's a grid-tie system. That's where the things he mostly left out come in. If you're looking for power when the grid is down or after sundown or if you don't have grid power where you are, then the batteries, inverters and other things are needed. Realistically, you should plan your solar system using the NOCT rating of the solar panels, which is about 73% of the advertised (STC) rating). That puts in a "fudge factor" for partly cloudy days and other things - including the "estimated" hours of useful sun not being accurate for your locatio, as some of the published insolation maps are hard to read closer than 100 miles. His "six hours a day" of solar power production might be six hours at some level of solar power, but NOT six hours of full rated power all year in most of the US - Maine does not get as much sun as Arizona. My location gets 3.2 useful hours in December (measured with panels powering a load and matches the site below) and 5.3 useful hours in May. In checking three different online "solar insolation" rating sites for my location, I get three different amounts of useful sun. This site: www.solarelectricityhandbook.com/solar-irradiance.aspx will give you the useful sun hours by month, angle of the panel(s) and the aiming of the panel(s) - not every location has perfect alignment to the South (Northern Hemisphere) or the North (Southern Hemisphere). In some practical testing - backyard sun at various times of the year at my location - some Jinko "250 watt" rated panels actually delivered 235 watts. On the other hand, assorted brands of "100 watt" panels (EcoWorthy, Grape Solar, Mighty Max, Sonali) rarely delivered more than 75 watts in the same place using the same MPPT solar charge controller. All my solar planning/design calculations use the NOCT values and I haven't yet been left in the dark. An "1100 watt" microwave oven typically has a nameplate rating of 1850 watts. The "600 watt" microwave he mentions in the video actually needs about 1000 watts so you need to read the nameplate for the actual rated power - or use a $35 KillAWatt to measure the actual usage: ($29 two months ago - same link - or 20% inflation in two months) www.amazon.com/P3-P4400-Electricity-Usage-Monitor/dp/B00009MDBU |
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