Tied Solar
how can I convert them out of solar panels in kilowatts of electricity per month.?
I'm looking at a set solar panel that produces about 400 watts of electricity and plan to use them on a grid tie system. My house uses about 700kwh per month.
Multiply times 400 watt hours per time savings per month. Divide by 1000 for kW. Say 200hr/mo * 400W * 90% / 1000 = 72 kW-h per month. The effectiveness above is the misalignment in the sun. As the sun moves throughout the day, it is rarely perfectly oriented. In addition, some panels are often not available to the rated current. If they are dirty, less power. BTW, two major issues that make solar cells (DC), often 12V or 24V rated, and you might need electricity when the sun does not shine (like the days of winter cover or night). Thus, you need batteries storage. These loose another 10 to 20% power. Since houses use 120V AC, you need an inverter, which lost another 10 to 20%. Self-240V loads, as dryers, stoves, air conditioners almost out of question. Solar generally not economical for most of us, if you are Ed Beggley, cost is not a problem, go for solar!
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