Sol-Ark 15K All in One Inverter Released.

[Carlos_Sol-Ark]

@Carlos_Sol-Ark, same deal for AC? I.e., best practice to have a separate disconnect if you're feeding PV AC into the gen terminal?

It is still recommended to have a disconnect for serviceability for AC coupled solar, but it is really up to local AHJ and preference at that point. When AC coupled systems are disconnected from the grid we will begin to frequency shift automatically and the microinverter output power will stop, but it doesn't hurt to have a reliable means of disconnect for safety outside of the GEN breaker for the 12K. The 15K however does not have an individual GEN breaker so keep that in mind during installs.

 

[Danke]

No grid = no input from micro inverters?

 

[Hedges]

Depends on where they are wired. Microinverters on SolArk output or generator port, and SolArk looks like grid to them.

 

[dsimonl]

Here is my solution to a single large battery, and the dual 200A breakers. A 2/0 jumper:

 

[niktak11]

Here is my solution to a single large battery, and the dual 200A breakers. A 2/0 jumper:

View attachment 114459

The current won't be evenly split between the breakers but it might be good enough

 

[dsimonl]

I was wondering about that. My battery has a maximum discharge of 300A. As long as 100A goes to the second breaker, I'm golden.

 

[robby]

I was wondering about that. My battery has a maximum discharge of 300A. As long as 100A goes to the second breaker, I'm golden.

And how many Amps can that Single wire coming up handle ?

 

[dsimonl]

The single wire is 4/0, 445A. The jumper is 2/0, 330A.

 

[Egl_81]

The single wire is 4/0, 445A. The jumper is 2/0, 330A.

I don’t think those values are correct, those wire sizes are rated for significantly less current from what you think.

Edit: I stand corrected, those values appear correct.

 

[niktak11]

I don’t think those values are correct, those wire sizes are rated for significantly less current from what you think.

Those numbers look accurate to me for 105C rated insulation

 

[dsimonl]

BatterycablesUSA UL listed cables:

For use as battery cables:
SAE J-378 Table of Allowable Amperage for conductors 50V or less with 105C rating
Gauge Amps Outside of Engine Space Amps Inside of Engine Space
6 120 102
4 160 136
2 210 178
1 245 208
1/0 285 242
2/0 330 280
4/0 445 378

 

[Ampster]

those wire sizes are rated for significantly less current from what you think.

Could it be higher capacity is because the wires are in open air not conduit?

 

[Lt.Dan]

WindyNation also rates their 4/0 at 440a.

 

[Danke]

 

[Danke]

The 15K charges up to 275A, 12,000W can be produced from batteries.

 

[Ampster]

12,000W can be produced from batteries.

Yes that is the inverter capacity of a product which has 15K in it's name. With AC coupling or AC passthrough it may be able to serve much larger loads.

 

[Danke]

Yes that is the inverter capacity of a product which has 15K in it's name. With AC coupling or AC passthrough it may be able to serve much larger loads.

Correct. So?

 

[Hedges]

12,000W/50V = 240A
240A / 90% / 80% x 1.25 x 1.12 = 373A

4/0 60C: 300A 75C: 360A 90:C 405A ampacity in free air

4/0 cable doesn't quite meets requirements using 90 degree C insulation, standard 80% of rated ampacity, assumed 90% efficiency, an my +12% for "ripple factor"

A couple tweaks to ratings and assumption, and it might just squeak by.

All good.

 

[Ampster]

Correct. So?

I just feel a need to mention it.

 

[niktak11]

12,000W/50V = 240A
240A / 90% / 80% x 1.25 x 1.12 = 467A

4/0 60C: 300A 75C: 360A 90:C 405A ampacity in free air

4/0 cable doesn't quite meet requirements using 90 degree C insulation, standard 80% of rated ampacity, assumed 90% efficiency, an my +12% for "ripple factor"

A couple tweaks to ratings and assumption, and it might just squeak by.

The 15k can only pull 275A continuous from batteries