36v/72v 2500w solar to 12/24v battery bank?

[Redn3ck]

Hey all,

I'm trying to see if there is a scc or all in one charger that I can use for my off grid system.

Currently I have a 12v (4x6v 150ah) battery bank with just 8x 100w 12v panels and an outback FLEXmax 60 and Renogy 3000w inverter.
Is there a charger that can handle the 2400w in at 12v or an all in one that I can put my batteries to 24v and handle the power in?

I got a deal on a panels 6 TR60- 400w
Vmpp 34. 2
Voc 41.2
Impp 11.7
Isc 12. 28

 

[ShaneC]

Can your inverter operate at 24V? If so finding a SCC that can handle 2400W will be feasible, for example Epever have 100A models with either 150 Voc or 200 Voc input. I just bought the 150V model for a similar panel arrangement. You'll want to put them in 3S2P which would result in 123.6 Voc, unless your area gets very cold in winter that should be well within the safety margin. If you're concerned there are calculators online for determining Voc at low temperatures.

If your inverter is 12V only then you'll struggle to find a 200A SCC. In that case you might want to consider selling your inverter and looking for a 24V AIO that can be both SCC and inverter.

 

[SamDeleted]

So mppt solar charge controllers are designed to reduce voltage input from panels to a suitable level for your batteries


So take that 72v of solar and transform it down to 15v~ (15v~ is required to charge a 12v battery)

 

[Redn3ck]

Can your inverter operate at 24V? If so finding a SCC that can handle 2400W will be feasible, for example Epever have 100A models with either 150 Voc or 200 Voc input. I just bought the 150V model for a similar panel arrangement. You'll want to put them in 3S2P which would result in 123.6 Voc, unless your area gets very cold in winter that should be well within the safety margin. If you're concerned there are calculators online for determining Voc at low temperatures.

If your inverter is 12V only then you'll struggle to find a 200A SCC. In that case you might want to consider selling your inverter and looking for a 24V AIO that can be both SCC and inverter.

Thanks for the reply.
I just looked and no the inverter is only 12v
So would something like the Aims SCC-100A MPPT be able to work?

15~155Vdc@12V
34~155Vdc@24V
50~155Vdc@36V
60~155Vdc@48V

12V 1400W
24V 2800W
36V 4200W
48V 5600W

I am just stuck thinking voltage in should equal close to batteries and I know that's wrong. Just because the outback scc I have now lists battery voltage to watts in.

Otherwise the question is if I get an all in one, would It be able to step down from that high voltage to 24v without issue?
I just get worried about the wattage limit of an all in one.

And it does get cold up here, temps of -30-40c for a few weeks of the year.

 

[SamDeleted]

Otherwise the question is if I get an all in one, would It be able to step down from that high voltage to 24v without issue?

It depends on the technology

If it's pwm then NO . If it's mppt (most are) then yes, read the specs for max solar input voltage

 

[DIYrich]

Since you have the flexmax 60, buy two flexmax 80, and parallel them with a hub4 or hub10.

 

[Redn3ck]

Hey all,

I'm trying to see if there is a scc or all in one charger that I can use for my off grid system.

Currently I have a 12v (4x6v 150ah) battery bank with just 8x 100w 12v panels and an outback FLEXmax 60 and Renogy 3000w inverter.
Is there a charger that can handle the 2400w in at 12v or an all in one that I can put my batteries to 24v and handle the power in?

I got a deal on a panels 6 TR60- 400w
Vmpp 34. 2
Voc 41.2
Impp 11.7
Isc 12. 28

Or can someone point me in the direction of an AIO that can handle 2500w? I've been searching steady and keep getting stuck at 1200/1400w

 

[DIYrich]

Growatt 3kW Stackable Off-Grid Inverter | SPF 3000TL LVM-24P

Signature Solar provides solar panels, off-grid solar systems, grid-tie, and hybrid systems. Quality solar inverters, bifacial solar panels, complete solar kits, solar batteries. Featuring brands such as EG4 Electronics with their solar battery, LifePower4 and EG4 LLifePower4 and EG4 LL

signaturesolar.com

It will clip at 2000 watts. You might put half facing east and half facing west to reduce clipping. Might be able to work in your other panels that way.

Or, stack two of the growatts.

 

[Mattb4]

Or can someone point me in the direction of an AIO that can handle 2500w? I've been searching steady and keep getting stuck at 1200/1400w

The PowMr (Pow-LVM3K-24V-H) rebadge of SRNE units have a high voltage model that claims up to 4000w solar*. It is a 24vDC battery output and 3kW at 120vAC unit.

* It might handle it as over paneling but it has a 80a charge rating.

 

[ShaneC]

You can also consider getting a separate SCC like the 100A Epever I mentioned which can charge 2400W into a 24V battery. You'll just also need to get a 24V inverter. That's unlikely to be cheaper than an AIO but it'll have lower standby power usage (some AIO have up to 60w usage) and will be better quality than the cheap AIO systems.

If you're considering using the grid as backup power then that's where an AIO becomes significantly easier to setup and probably the best choice.

 

[Redn3ck]

Thanks for the responses guys.
Noticed that renogy had a deal on so picked up the 100a scc and just got a 24v inverter on Amazon.
I appreciate it guys.
Might go for an AIO after a few years