??? Set Points For Different Battery Types

http://africanenergy.com/new/wp-content/uploads/2012/08/Renewable-Energy-Charging-Parameters.pdf
save it!

There are less than $100 solar charge contollers that have adjustable set points and temp comp.

Almot wrote:
...Lower-end chargers have only 3 choices: Gel-Flooded-AGM, - so you'll have to convince yourself that the answer is "Yes", and stop worrying because you can't do anything about it.

Not worried about a thing. Just trying to learn.

No, they are not the same. that's why I wrote in another thread that you need a 3-stage charger with adjustable setpoints.

Lower-end chargers have only 3 choices: Gel-Flooded-AGM, - so you'll have to convince yourself that the answer is "Yes", and stop worrying because you can't do anything about it.

Deka AGM setpoints: Page 11.

Note that setpoints change with temperature. "Normally", people set the voltage recommended for 25C=77F, and controller will adjust it automatically when ambient changes, if it has temperature compensation feature. It is recommended to buy one with such a feature.

With 200W solar prepare to pay ~$90-100 for controller that meets all these requirements.

Your P30 controller is adjustable and has temp sensor, but it has only ONE setpoint. Set it to 14.3 in the morning, change to 13.4 in the afternoon, that's all you can do.

It is a Deka intimidator, rebranded

OP here. I could not find info online regarding my new battery.

It's a Duracell AGM Deep Cycle Marine and RV battery - Group size 31, purchased at Sam's several weeks ago. No "manual".

Hi,

I would go with the maker's recommendations for voltage @ 25 C (77 f). I'd further use a battery temperature sensor to adjust those numbers up and down.

No. It is BEST to consult the Owners manual for your specific Charger system. For instance, Magnum Inv/Chargers, you use AGM-1 for one specific AGM brand battery. ALL other AGM's you use AGM-2 setting. Doug

smkettner wrote:

Otherwise 14.4 absorption and 13.4 float covers all AGM/wet cell pretty good.

So that would be yes then. :)

The difference isn't enough so that most users will even notice.
The "purist" insists that AGM needs higher voltage but they really don't "need" it for any practical reason.

Having a 3 stage converter is the best upgrade you can make......even if it doesn't provide the absolute optimum voltages for the batteries you have at the moment.

Keeping the connections clean and tight and keeping the electrolyte from getting low is usually more important that worrying about charging voltages.

I get along just fine with a single stage 13.4 converter and a 14.4 voltage from the engine when going down the road.......but I am thinking about a new converter so I don't have to run my generator quite as long to recharge.

No. Best to check with the manufacturer.

Otherwise 14.4 absorption and 13.4 float covers all AGM/wet cell pretty good. GEL you need to verify and may also have ampere limit.

Post what you have if you are having trouble finding the preferred numbers.