Thank you for answering . Epever 3210AN , the controller has a fixed power does not allow me to vary any parameters . As for the absorption phase, I can't tell you because I have limited knowledge, but I can tell you that in the morning when the batteries are charging from 9.00 AM until 14.00 Pm as written they expected a charge of at least 30 amps, instead it always stops at 21 amps.
Hi Mike, here are the parameters. I carried out tests with a 240 watt load, and looking through ever software I always read 300 watts. The panels are 3 and of the same brand and model, 12 v 180 watts for one. As written, however, the question is: after adding the second identical battery to the first, I have to expect that the accumulation can receive e.g. 40 amps in short, the maximum of what can generate 540 watts of fv or not? I tested the panels in voc, and all three seem to give the correct vacuum voltage of 23 volts. What is not clear to me is just to understand if the batteries have their own absorption limits (resitive factor), I refer to the fact that if I sent even 100 amps the battery can absorb at most e.g. 30 amps. In short, to understand all the opposite of lithium. I still have the doubt to understand the charge factor always at 21 amps and not at 40 for example, considering that now there are 2 batteries. AGM c100 110 ampere cadauna . Mine are beginner's observations.
If you intend to double, because having panels that are able to provide even 30 amps, I see that in charge it is always stopped at 21? It seems or I have the feeling that a battery limits the charge.
Yep, you're right on that but if it can then you can.
If your SCC is outputting 21 amps at 15v that is 315w. or 58% of panel wattage. Not an unusual amount depending on time of year and panel location. I generally am happy when I get 75-80% at my place. Adding another battery does not change what your PV and SCC can output. It only adds to the storage capacity. And as you note that if the SCC only outputs a given amperage it is seen by batteries in parallel to be divided by the number (21a/2=10.5a per battery)
Sorry, what do you mean scc?
I don't know what you intend to check. I tried individually to check the open circuit voltage individually and they are all and three at 23.1 volts, so I think they are healthy, as they are new.
Check panel orientation to the sun. Check voltage at the SCC (Solar charge controller) when charging at the PV input terminals. Open circuit voltage only tells you the panels are producing voltage but not how much power they are producing under a load. For that you need voltage under load and amperage to get wattage. W=VA
Hi, the batteries are AGM and do not have to be equalized, so I don't think it has to be done. The reason why they should not be equalized and why unlike flooded they cannot boil .....
Yes, even if it is a spartan test, it is appropriate as advice. Each panel could give 9.43 amps but considering the season I expect 7 amps as you say. I should connect 1 panel at a time and see . However, the panels are identical and new, bought only a few months later.
Even new products aren’t always good. I would want to verify they are all working as they should.
