Solar help... Mppt or PWM

Almot wrote:
You're reading too much :).

The essence of the article is summarized at the very beginning:

"each charging system should be set up with one common set of voltages similar to the following:

Bulk 14.7 volts
Absorb 14.7 volts
Float 13.5 volts".


If the Float went to 14.8, it would be a nice little boiler.

Ok well your misunderstanding me I guess. The ecoworthy does not have an absorb stage.. Just bulk and float..

From my link below here is how I will charge my batts boondocking..

wake up say batts at 12.2 volts.

When sun comes up and unit goes into bulk @ 14.8v. I will time this until it hits float.. ( Say 3 hours it stays in bulk as an example)

Then when it goes into float I will up the voltage to the max of 14.5v. I will leave it at this setting for 3 hours because thats how long bulk took.

After 3 hours I will reduce the voltage on float back down to 13.6 for the rest of the day.

So essentially I am adjusting the float voltage to act as an absorbsion stage and a float stage..

Same will apply if I dont run the batterys down to 50% and it stays in bulk for a shorter time.. Say 2 hours.. I will then let it run 2 hours at the higher float voltage after it comes out of bulk.

This is afterall how the outbacks work from what I read.. I did not actually go to the site to read the manual to see if this is try.....

If we ever get sun here in NJ I will do more testing and hydrometer readings..

I thank everyone for their help and support for my solar project..