How Many Amps Does A 120w Solar Panel Produce

Solar roof top gmc suburban a normal 3 4 ton suburban with 180 watts of panels on the roof and 10 amp genasun mppt 2000w samlex pure sine wave inverter 12v gast and arb air compressors.

How many amps does a 120w solar panel produce.

A 100w solar panel divided by 12 volts equates to 8 3 amps. 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. Please note that solar panels are not 12v i repeat solar panels are not 12v. Unfortunately solar panels don t generate a steady stream of electricity all day.

They generate less power when the sun is low in the sky mornings and evenings or when clouds are moving across the rooftop. This is why we need a regulator or solar charger to reduce these high voltages to a level that our 12v batteries can accept. This is how we know how many amps of charge we can expect from any solar panel. If we assume that only 1 3 of the day is sunlight hours then it is safe to assume that the panel can supply between 6 and 7 5 amps for this period.

To calculate the energy it can supply the battery with divide the watts by the voltage of the solar panel. 120 watts 18v 6 6 amps. That same 300 watt panel produces 240 volts which equals 1 25 amps. One common number is 36 segments for 18 load volts and these are often used for charging 12v battery systems you need a higher voltage panel than the batteries you are charging.

However an unregulated 12v solar panel can output up to 22 volts in full sun. Now we could have one 120 watts coulee small solar panel one 12 volts 150 amp hours battery or two 12 volts 75 amp hours batteries and a charge controller that would be our solar system ultimately. A 120w solar panel can supply between 6 and 7 5 amps on a sunny day for most of the sunlight hours of the day. Each individual solar segment 0n a panel produces approximately 0 5 volts and the size of each segment determines the amps it can produce.

Solar panels power generation is commonly given in watts e g.