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if I want to power a 500 watt air conditioner, what watt solar panel system will I need?

Other words, is it the same wattage the air conditioner is? Sorry for the confusion lolz

Depends on how long you run the A/C. Let’s use 500W of panels as an example. Consider the fact that the panels are generating power at 500W rate for about 6 sun hours a day in the summer (depending on where you are). When you figure in losses, if you run it for 4 hours, 500W of panels may do it. 500W x 4 hours = 2000 watt hours (or 2kwh) needed, 500W panels x 6 sun hours -35% losses = 1950wh generated.

You can calculate how much you would need in panels and batteries on an off grid calculator like this, http://www.altestore.com/store/calculators/off_grid_calculator/. If you are planning on staying connected to the grid, but want to offset the amount of power the AC uses, you can go to a grid tied calculator like this, http://www.altestore.com/store/calculators/on_grid_calculator/.

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