If the batteries are flat ie under say 12 5 volts then on a good sunny day at the peak of the day you would get say 8 0 amps 100 12 5 based on a 100w panel.
How many amps 100w solar panel.
A 100w solar panel like the renogy 100w i own two of these generates about 6 amps per hour 50 70 watts during the peak sun hours of the day.
For example if the solar panel is rated at 175 watts and the maximum power voltage vmp is given as 23 6 volts then calculate the current as 175 watts divided by 23 6 volts which is equal to 7.
So if you have a 100ah rv battery you can charge 50 of it in a little over 8 hours 50ah 6a 8 33.
This is a real life example of someone who has been using the exact solar power kit i recommend here on this site.
You get less watt per dollar when compared to larger panels.
It is this that makes the answer to the question not all that straightforward.
Most crucially 100 watt solar panels provide you less bang for buck i e.
It may seem obvious but all of these factors will effect how much power your 100 watt solar panel can bring in.
All of these factors mean that a home solar system built with 100 watt solar panels simply isn t worth it.
For this reason most residential solar systems use larger solar panels usually rated between 250 w.
50 is 50 of our 100ah battery and 6 is how many amps the 100w solar panel is generating.
Since watts equals volts times amps 18 volts x 5 55 amps 100 watts.