Sunday, July 17, 2016
200 watts of Solar Panels Provides How Many Amps a Day?
Solar Panel Amps Delivered Every Hour for 12 Hours
There are many questions people new to Solar Systems ask. The most common is how many watts do I need to run a fan, compressor type refrigerator, laptop, some lighting and also how many batteries will I need?
First you need to find out the watt consumption of each device. A simple call to the manufacturers’ customer service will provide that information. Or buy a Kill-a-Watt meter and measure it yourself.
It’s a simple 200 watt system, two 100 watt panels, similar to what is being used by many van-dwellers and RVers’. The panels are aligned pretty close to perfect to the sun.
For test comparison accuracy I used a 750 watt electric heater for a few minutes at a time to maintain a 12.2 volt battery state of discharge between the hours of logging the results.
The chart below shows the measured amps going to the battery on clear sunny
day. The chart shows the hour of day and the delivered amps at that hour. Florida
Time of Day: AMPS Delivered
68 amps total delivered for the day