Absorbsion Charging Wet Batteries

[MEXICOWANDERER]

As batteries charge, amperage will sag and voltage climbs. There is a point where solar panels can effectively replace a running generator.

Use 14.8 voltage to start out with on the generator. If you have 40 amperes max DELIVERED panel power you can shut the generator off once amperage sags to 40 amps.

[Lwiddis]

Gordon, solar trackers are cool but adding a panel or two is cheaper and much less prone to failure. So, no wager!

[MEXICOWANDERER]

To gain any sense of perspective between charge regimen times the voltage must remain constant, 14.8 volts from the moment you flip the switch on to the moment you flip the switch off.

Skewing the results with variable voltages and non saturation makes time savings analysis worthless -- flipping a coin is just as inaccurate.

No variable voltages please and no cheating on the 14.8 volts.

Then and -only- then can you realize an accurate answer in perspective.

This is all about generator run time 🙂

[time2roll]

MEXICOWANDERER wrote:
Silicon carbide cells for NASA and DARPA are 167% as efficient as commercial cells.

Cost effective for outer space only.
For earthlings lower cost to expand your footprint.

[MEXICOWANDERER]

Remember the stories about Rolls Royce, Jaguar, and Aston Martin? I don't know if they were true or not.

But it was a snotty reply

"If you have to inquire the cost of ownership then may I suggest another marque"

[GordonThree]

pianotuna wrote:
And the price?

MEXICOWANDERER wrote:
Silicon carbide cells for NASA and DARPA are 167% as efficient as commercial cells.

More than a golden hammer or toilet seat, typical DOD pricing.

[pianotuna]

And the price?

MEXICOWANDERER wrote:
Silicon carbide cells for NASA and DARPA are 167% as efficient as commercial cells.

[MEXICOWANDERER]

Silicon carbide cells for NASA and DARPA are 167% as efficient as commercial cells.

[GordonThree]

I wager he's working on a automatic solar tracker for rooftop RV install.

[time2roll]

If I get 40 amps from solar, I am not starting a generator.

[Lwiddis]

“in hopes that will get the batteries "full" before dark.”

What hopes? I’m full by noon usually...3 p.m. tops...with 300 watts and no pointing.

[BFL13]

Mex 40 amps of solar means you have about 40/8.2 x 130 = 634w array pointed directly at a high sun.

You can't get constant amps with solar unless you can keep the array pointed and tilted just right as the sun goes by while also going up and down.

However, it remains valid that you can follow your shot of generator charging with solar for the rest of the day in hopes that will get the batteries "full" before dark.

You can extend the gen time high amps when you know the daylight time after that will be short.