Supplementing my batteries without spoiling my harvest

[littleharbor]

Interesting crimper. The ones designed for MC-4 connectors have an adjustable bracket for holding the contacts at the correct depth in relation to the die's jaws. Did you try using something like WD-40 or some di electric grease to help slip the sleeve on?

[Ninety-9 SE-L]

Quick question. What should my voltages be for the AGM batteries?

I figure 29V for absorption and 27V for float, maybe a hair above. What would my voltage be at 25, 50, 75 and 100% DoD?

[travissand]

I'm concerned you're not going to save any money. It looks like that was your intent. You're spending a lot of money 2 destroy some lead acid batteries. But on the plus side you'll learn a lot. I

If you want to save some money you should grid-tie. That way you're using a tiny cheap grid-tie inverter with your solar panels and every bit of energy you use goes immediately into consumption. Personally I don't recommend this but

My experience my Flooded lead-acid batteries only take what they can handle oh, most of the time as others have pointed out. However my AGM batteries definitely suck up well over there manufacture specs in amperage before reaching the spec absorb voltage.

[travissand]

Quick question. What should my voltages be for the AGM batteries?

I figure 29V for absorption and 27V for float, maybe a hair above. What would my voltage be at 25, 50, 75 and 100% DoD?

For state of charge at different voltages a simple Google search and sort by images gets you to a graph. https://www.google.com/search?q=soc+...iw=360&bih=512

AGM batteries are very sensitive to over-voltage and overcharging. My AGM's in my 24 volt system can't handle the voltages you speak of. You need to look up the manufacturer specs.

I have some very expensive interstate 8D AGM batterys. over 200 amp hours each at 12 volts. I went to the interstate battery dealer and they could not even tell me the specs. I called their tech support line and they couldn't help. I kept calling tech support line until I got somebody who knew what the heck they were talking about and he emailed me a spec sheet that can be found nowhere on the internet. What I'm saying is you might have to call the manufacturer and harass them.

[travissand]

AGM batteries on a solar system are like delicate little flowers.