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Best to rephrase your question and start your own post.

Yes. Yes. Difference, not really. Yes.

Maximum PV input voltage for your charge controller is 100 VDC. Would need to know specifications of your six 100 watt panels. Their Open circuit voltage (Voc) = ???

your local power company will tell you what they want

seems fine

Have you measured PV voltage at inverter input?

Did you connect charged battery FIRST then connect PV?

Had this worked previously? Is the polarity correct? You've measured 36.8 at the inverter PV input?

Good luck.

Is that 187VDC measured while PV connected to inverter?

Look for deep cycle battery. https://carbonfreeheat.ie/200-amp-deep-cycle-battery-12v-ireland

Minimum PV voltage is 120VDC, should work but another panel may be wise.

Battery charger.

Harbor Freight. SKU 57991

Unplug it from utility.

Hi.

No. Nice to have.

Your welcome. Do you have a question?

Not much in the way of longevity in your preparedness, but pWm charge controller fine although car battery not so.

Fine by me.

no

look into chain link fence pipe 16 gauge https://www.chainlinkfence.com/galvanizedpipe.html

What is your off grid power requirement?

1 conductor per phase utilizing a 4 AWG copper conductor installed Cable, Conduit (non-Steel), & Direct Burial will limit the voltage drop to 1.95% or less when supplying 24 amps for 130 feet on a 85 volt single phase system.

Since it is a 24 volt inverter 2 (12 volt) batteries would be hooked up in series. Would need more info on panels to see if 4 in series is appropriate (like your picture).

Model = ?

Not enough information provided.

Confirmed.

R = L1 S = L2 T = L3 Maybe switch Program 23 on phase 2 & 3 inverters ? Were units commissioned in sequence?

Open circuit voltage of solar panel array must be at least 40+ volts if you plan to charge a 24 volt battery with it. You have not provided the specifications of your "2 used 250w 24volt panels". 2 AWG will handle around 94 Amps, while 2/0 AWG will handle around 190 Amps. No. It can handle...

Cannot follow these instructions; why don't you just post particulars.

Old error. Any way to update software? Have you powered down completely, solar, battery, AC and restart? Factory reset. Could be shorted battery cell, timed out on charging cycle.

If I am reading your photos correctly: Maximum inverter voltage (Voc)= 105 VDC and panels Voc =21.6 VDC 2S & 2P should be fine.

Should.