In this scenario, 800 watts of solar panels would produce: 800 watts x 5 hours = 4000 watt-hours or 4 kilowatt-hours (kWh) per day. Keep in mind that this calculation provides an estimate based on ideal conditions. This is enough to offset the electric usage of a typical U. In other words, a 1 kw system will save you $30-$40 per month on your electric. . The 800-watt solar power system is one of the best solutions to utilize solar power in running some devices during the day and night. However, many questions might come to your mind when building your system. What inverter size could I use for the 800w solar array? How many batteries do I need for. . It is difficult to say exactly how much power an 800 watt solar panel can produce because there are many variables that can affect its output, such as sunlight hours, panel tilt, and geographic location. In real life, output can be a bit lower.
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