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6

If you're in the northern hemisphere, the lower angle of the sun in the winter is probably contributing to your low numbers. (When the sun is low in the sky it passes through more atmosphere to reach the ground.) Presumably you'll do better in the summer. Also, the tilt angle of the panels should be matched to your latitude. If your panels are mounted on ...


4

You have fifty-six 240-watt modules. They each produce 240 watts under standard test conditions (STC). STC is defined as 1000 W/m^2 of irradiance, 25ºC temperature and AM1.5G spectrum. These conditions are rarely reached outdoors. If the temperature is higher or the irradiance is lower than STC, you'll get less power. You can usually only achieve 25ºC ...


2

For me with a solar system in New Zealand, we've found the following quite effective: we've got a solar tank with 2 electrical elements in it, one at the bottom of the tank, plus another one about a third of the way down from the top. We run the bottom element overnight intermittently during the winter months when the whole tank is cool, the forecast is ...


2

The short answer is no. You might be able to produce a curve that will reflect an arc (spanning the days extent from east to west) all day on a given day without moving it, but only a small portion of such a mirror will be going into your window at a given time, wasting the rest of its arc. Further, (as the season changes) your north-south alignment has to ...


1

That does seem a little bit low but not crazy. I have a 3.3 kW DC array on my roof and during the peak times of the day I can get 2.7 kW AC after the inverter, or about 80% efficiency. I live in Northern CA though, where you can have cool and sunny days in the summer. Since you are in the US, one thing you should check out is the PVWatts calculator. This ...


1

Pretend your panels are a water pump connected from a nearby pond (your roof) to a water tower (the grid). The grid is a large reservoir that can simultaneously take and provide electricity. This is because there are multiple sources and destinations for the electricity. If no one else was using electricity when you were providing it, your meter would ...



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