Solar Panel Amp Hours

1203 watt hours 12 volts 100 amp hours per day.

Solar panel amp hours.

To clarify some of the mystique involving watts amps and amp hours let s begin with a 100 watt solar panel that produces 5 amps during peak sun hours a solar day. How many amps of electricity the panel will produce depends on. A solar panel will generate electricity when placed in the sun. Solar panel efficiency solar panels are rated for their max efficiency that is a 100 watt solar panel will produce 100 watts in perfect conditions.

How much energy does a solar panel produce. At the end of this typical six hour solar day the panel will have generated 30 amp hours 5 amps x 6 hours 30 amps hours. In a perfect world that you use 1 kwh per day. 100 amp hours per day 3 panels 33 amp hours per day per panel.

In the real world never drag your batteries below 50 charge. A 130 amp hour battery will not cut it especially considering an 18 watt solar panel will only charge at a rate of 1 25 amps per hour. Current will flow from a panel connected to an electrical circuit. For example 24 kwh 500 amp hours at 48 volts 500 ah x 48v 24 kwh it s usually a good idea to round up to help cover inverter inefficiencies voltage drop and other losses.

Which is remarkably close to the 30 amp hour per day rule of thumb. For 3 days that s 210 amps total draw. It also assumes a perfect installation facing due south at an optimal tilt angle and unshaded between 9am and 3pm. For the sake of example if you are getting 5 hours of direct sunlight per day in a sunny state like california you can calculate your solar panel output this way.

Thus the output for each solar panel in your array would. Since we were estimating in phoenix the 10 increase should be expected. For 6 hours that s 70 amps. Usable sunlight per day.

Recharging at a rate of 7 amps a day while the draw amount is 70 amps a day is not going to be enough. You can expect your panel to produce roughly this amount per day in the spring and fall. But the nrel website goes beyond that. First you will have to determine the ampere per hour rating of the solar panel by dividing its power generation rating given in watts by the voltage of the battery.

One 100 watt solar panel in 10 hours of strong sunlight every day into your battery and you are self sufficient. To get that kilowatt hour back in your batteries your panels have to put in 100 amp hours from the sun before it sets. This map shows watt hours per 100 watts of solar panel system capacity. Amp hours are based on 6 hrs.

5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh.