SRNE 48v 3500w AIO

[1977dually]

I've been going back and forth between a 24v system and a 48v system, mostly because of the size of my doors into my pass through on my trailer, plus MPPT voltage range.

I can fit an Eg4 48v server rack battery through the door. My panels put out about 84vdc. The operating range of the SRNE AIO is 60-145vdc.

Will my panels be satisfactory to initiate charging?

I'll add that once through the doors there's quite a bit of room inside the storage pass through .

Edit: I contacted SRNE directly. We'll see what they come back with

 

[sunshine_eggo]

I can fit an Eg4 48v server rack battery through the door. My panels put out about 84vdc.

Not enough information. Voc or Vmp? Is this for a single panel or panels in series?

The operating range of the SRNE AIO is 60-145vdc.

Will my panels be satisfactory to initiate charging?

To provide adequate voltage to charge a 48V battery, you need to supply about 65-70Vmp at the array. The extra voltage is to account for the ~10% penalty given to Vmp due to the panels heating while in the sun.

 

[1977dually]

Not enough information. Voc or Vmp? Is this for a single panel or panels in series?



To provide adequate voltage to charge a 48V battery, you need to supply about 65-70Vmp at the array. The extra voltage is to account for the ~10% penalty given to Vmp due to the panels heating while in the sun.

The panels were on the trailer when I purchased it. I'm assuming 4 panels in series. The voltage was measured at the MPPT

 

[sunshine_eggo]

The panels were on the trailer when I purchased it. I'm assuming 4 panels in series. The voltage was measured at the MPPT

Was current flowing or not?

 

[1977dually]

Was current flowing or not?

It was charging the battery. Cloudy or sunny, it's the same voltage

 

[sunshine_eggo]

It was charging the battery. Cloudy or sunny, it's the same voltage

You may not be aware but PV systems are highly variable.

Voc = the open circuit voltage when 0A is flowing.
Vmp = Voltage at max power (about 95% of max current, Isc)

Voltage can be anywhere in between them, and it's influenced by temperature as well, so it can be outside this range as well. Also influenced by how heavily it's being used. If it's just floating the batteries, near Voc. If it's givin' it all she's got, it's Vmp.

Since you can't provide rated specs, I'll conclude that you have 4S "12V" panels in series that yield 17-19Vmp and 21-24Voc EA

This should be sufficient to meet the MPPT operating range and charge a 48V battery.