6x 195-watt 60-volt panels and one or two Epever 4210 40amp MPPT charge controller(s)

[Lenny's OffGrid RV Living]

I've been running a smaller 1,200-watt 12v system for over five years but haven't had to figure things out in quite a while. I recently acquired 6x 195-watt 60-volt panels that I want to incorporate into an expanded system. I have two Epever 4210 40amp MPPT charge controllers. Should I do three panels with each CC and keep it 12v or go with all six panels into one CC and go with a 24v system and then use a converter down to 12v for all my existing 12v appliances? I could then keep the 2nd Epever as backup or run both of them and have constant redundancy into a 12v system.

Next question, what is the best way to wire the panels in both scenarios?

In the 24v scenario, the one Epever could be slightly over-paneled with just under 1,200 watts, which is over 1,040 watts. And all six panels in parallel for 60V and around 18 amps total. Is this correct? Then I would need a 24v to 12v step-down converter, right?

In the 12v scenario, the two Epevers could have 3x 195-watt, 60-volts in parallel for under 600 watts, 60 volts, around 10 amps. No step-down coverter would be needed.

The 24v system would mean less PV wire but both scenarios would need multiple splitters from the panels to the main PV wire feed.

From Epever Description -

• 40amp Solar Charge Controller PV Rated Charge Power: 520W/12V, 1040W/24V. Max.PV Open Circuit Voltage: 100V(92V At 25℃ environment temperature). And has real-time energy recording and statistical and multiple load work modes.

Thanks in advance.

 

[Lenny's OffGrid RV Living]

Bump

 

[Lenny's OffGrid RV Living]

Did I post in the right section?

 

[Lenny's OffGrid RV Living]

Dang, I feel shadow-banned. lol

 

[pollenface]

You already have two 4210's .... no step down converter needed. That would be my choice.

 

[CaliSunHarvester]

Yes with the 4210, max voltage is 100V, so only 1 panel in series, all have to be parallel.

 

[Lenny's OffGrid RV Living]

Yes with the 4210, max voltage is 100V, so only 1 panel in series, all have to be parallel.

I thought, in all that I've read, that going over by less than 20% wasn't an issue? Of course, the 2s3p would be for 24v. If I go with 12v, then I'll have to go with 3p for each of the charge controllers.

 

[pollenface]

I thought, in all that I've read, that going over by less than 20% wasn't an issue? Of course, the 2s3p would be for 24v. If I go with 12v, then I'll have to go with 3p for each of the charge controllers.

No It's not an issue. 3p for each controller is fine.

 

[Lenny's OffGrid RV Living]

Thanks for the replies. I wired the first 3p today. Will do the next 3p on 2nd Epever tomorrow.

 

[littleharbor2]

What are the actual specs for your panels?

Here's something interesting put out by EP, regarding over paneling.