Calculate Amp Hours Solar Panel

This is a simple version for estimates only.

Calculate amp hours solar panel.

If you only know the ac amps multiply by 240 to get watts. So if you have a 7 5 kw dc system working an average of 5 hours per day 365 days a year it ll result in 10 950 kwh in a year. We have led lights ac dc fans available i n markets but people usually don t want to change over to dc appliance. To figure out how many kilowatt hours kwh your solar panel system puts out per year you need to multiply the size of your system in kw dc times the 8 derate factor times the number of hours of sun.

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. Battery capacity is measured in amp hours e g. For example if the solar panel is rated at 175 watts and the maximum power voltage vmp is given as 23 6 volts. When solar panels are charging a battery it is usually at a varying rate which could harm an appliance if not regulated.

Please let me know the formula with different options. Ah refers to amp hours. 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. 200 watts 12 volts x.

So solar panel must be rated at 10 amps so that at peak sunlight it gives 10 amps and gradually becomes lower until it drops at 2 amps by evening. Amps 200 watts 12 volts. Need to know as to how to calculate the number of 330 w or 150 w solar panels. Calculate the current in amps by dividing power in watts by the voltage in volts.

If your system is 12 volts nominal this is what i recommend you do. It can give you an estimate of your total power usage in either amp hours or watt hours. Watts volts x amps. Battery capacity in watt hours x 2 rated panel power in watts example.

You need to convert this to watt hours by multiplying the ah figure by the battery voltage e g. So the solar panel practically should be 12 x 10 120 watts. Then take the battery capacity which measured in ah and divide it by the amp rating the result from prior computation of the solar panel and then adding 10 of the charging time. The back will be required for 3 4 5 and 6 hours.

Say you use a 200 watt solar panel. Amps 16 2 3 amps. If you want to get an estimate of the number of solar panels required you need to leave the volts at 12. 12v see calculations above.

Environmental factors will likely increase charge time. Think of this as the minimum battery bank size based on your typical usage. But clearly a 200 watt solar panel can charge at a rate of roughly 15 17 amps per hour.