Solar Charging and Amp Hours

DarkSkySeeker wrote:
Is the amperage from a solar panel constant as the battery it is charging charges up?

I.e., as your battery reaches full charge, the current drops to zero either via the charge controller or the equalization of the panel and battery, right?

So this simple math is false? 120 watt panel, 12 volt system, 10 amps, 10 hours to charge a 100 Amp Hour battery?

I am going to try to answer a question you posed last June. Then we can work up to explaining what solar panel specs there are.

YOU wrote:
What I don't understand is how a system that generates 20-50+ amps doesn't fry the batteries.

Amps alone cannot 'fry' batteries, I wish you would explain what 'fry' means. But I digress.

In the world of DC, Watts = Volts * Amps. Now if your battery is resting at 12.5V and you apply one million Amps at 12V, then it is likely that Amps would be taken from the battery.

What! Yes, to charge a battery, you MUST apply higher Volts than the battery's standing Volts. It is the difference between the charging Volts and the battery's Volts that matter. If you want to raise a battery to a set Volts, you must also set the desired Volts with your battery charger.

The battery's specs dictate the upper limits of both Volts and Amps. The charger must obey these limits. It is your responsibility of employ a proper charger.

When you connect a solar panel directly to your battery, you can see there is no regulation mechanism to meet the battery specs. You don't want that if the panel specs exceed the battery specs.

HTH;
John