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These are LiFePO, not Lead Acid, the .2 or .3C is for Lead Acid. Everything I've read suggests .5C for LiFePO. The Mfg is slightly conservative on that #, suggesting about .44C.

I currently have 2x 48v LiFePO batteries w/ 103Ah capacity in parallel. The spec sheet recommends a charge amperage of 45A for a single battery. How do I determine the correct charging amps for the two batteries in parallel? I also plan to add a 3rd battery soon, so I want to make sure I am...

I cant usually see the needle move unless the gusts go well above 20mph. I also want to be able to track how much it is actually producing over the course of a day. Right now I have no way to do that short subtracting the solar/generator values from the total. Thats why I'm hoping to be able...

Thanks. I'll look into getting another one.

The FNDC battery monitor has a main wire that connects to +/- battery plus 4 sensor wire pairs. I have one of the sensors monitoring the main shunt so it would pick up the charge from the turbine as well, but that would be mixed in with anything coming in from solar/generator as well. I was...

I have an old 48v wind turbine power generator that was in use on my system when it was on flooded lead acid batteries. Since I upgraded to LiFePo4 batteries I havent reconnected it. I'm wondering if it would be safe to use it on the new batteries. My understanding is that it has its own...

I got the wiring sorted out and now the FNDC is picking up the charge correctly. Thanks again for the help.

It did pick up the charge from the generator. After the generator ran last night to get the first full charge on these new batteries it did show SoC as 100%. It just appears it is not picking up the charge from the solar due to the way they had it wired. Basically it goes AC Generator ->...

Now that I'm looking at this more, I suspect it may not be picking up any of the solar charging. I'm assuming the FNDC only picks up what goes across the shunt. It would pick up the charge from the generator since that goes from the Inverter side over to the battery side. However, it looks...

Today is the first day the batteries (and flexnet dc) were installed. Right now the only shunt sensor is connected to the DC side negative so. One side of that terminal is all negative side connections, the other side of the shunt goes to the inverters. There isnt another sensor over on the AC...

One more question. I see on the OpticsRE page that the SOC is at 59%. I'm still getting sun and it seems to have been holding 'float' (54.4V) all day. Any idea why SoC is that low and has actually gone down a bit? My load has been very light today (under .4kwh) and I've had lots of sun so it...

Ok, the temp probe is off. It was previously on the FLA batteries but I did not install one on the LiFePo4 batteries.

Thanks for the info. I have an issue: The FM80 temperature settings do not have an "Off". I only have Wide or Limited and two sliders to set if I chose Limited. They wont see that cold of a temps. Typically the ambient temp where they are is around 60F.

I bought a house that came with an off-grid solar setup and have been working on updating it and have some questions on making sure I am using it correctly. It had an older Outback FX60 charge controller so I upgraded to the FM80 (and the mate3s) and added an FNDC battery monitor. It had been...