Calculate Amp Hours Solar Panel

This is a simple version for estimates only.

Calculate amp hours solar panel.

Watts volts x amps. For example if the solar panel is rated at 175 watts and the maximum power voltage vmp is given as 23 6 volts. If you only know the ac amps multiply by 240 to get watts. 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.

But clearly a 200 watt solar panel can charge at a rate of roughly 15 17 amps per hour. When solar panels are charging a battery it is usually at a varying rate which could harm an appliance if not regulated. Battery capacity in watt hours x 2 rated panel power in watts example. Think of this as the minimum battery bank size based on your typical usage.

Say you use a 200 watt solar panel. Amps 200 watts 12 volts. Environmental factors will likely increase charge time. Please let me know the formula with different options.

It can give you an estimate of your total power usage in either amp hours or watt hours. Again at this rate the battery would require to 12 hours to get fully charged. Calculate the current in amps by dividing power in watts by the voltage in volts. 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.

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. We have led lights ac dc fans available i n markets but people usually don t want to change over to dc appliance. 200 watts 12 volts x. Amps 16 2 3 amps.

Battery capacity is measured in amp hours e g. The back will be required for 3 4 5 and 6 hours. 12v see calculations above. 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.

Ah refers to amp hours. 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. If your system is 12 volts nominal this is what i recommend you do. 10 watt 18 volt solar panel charging a 12v 10 amp hour lead acid battery 120 wh from 50 full to full time 60wh x 2 10 watts 12 hours.

So the solar panel practically should be 12 x 10 120 watts. If you want to get an estimate of the number of solar panels required you need to leave the volts at 12. For any 240v appliances enter the watts ac not amps ac.