AC Combiner Panel

[BackCountry]

Does anyone have any manufacturers they’d recommend for a rooftop NEMA4 AC combiner panel? I have four 30A 480v branch circuits coming from Yotta DPI-480 micro inverters. I’d rather combine up on the roof than bring each circuit into the panel board at the meter.

I’ve used TerraSmart (Solar BOS) AC combiners before (https://www.terrasmart.com/wp-content/uploads/2021/10/SS08-SolarBOS-AC-Combiners.pdf).

Was wondering if anyone else had a better solution? This is relatively small at 100a of calc’d load.

A QO panel board with the smallest frame calc’d out at $10k with a 100a main breaker. I’m pretty confident we can do better.

 

[BackCountry]

Does anyone have any manufacturers they’d recommend for a rooftop NEMA4 AC combiner panel? I have four 30A 480v branch circuits coming from Yotta DPI-480 micro inverters. I’d rather combine up on the roof than bring each circuit into the panel board at the meter.

I’ve used TerraSmart (Solar BOS) AC combiners before (https://www.terrasmart.com/wp-content/uploads/2021/10/SS08-SolarBOS-AC-Combiners.pdf).

Was wondering if anyone else had a better solution? This is relatively small at 100a of calc’d load.

A QO panel board with the smallest frame calc’d out at $10k with a 100a main breaker. I’m pretty confident we can do better.

Annnnnnnnyone?

 

[scrubbin]

Maybe:

Solar Power Combiner Box For 6 or 8-String PV Systems

Solar Power Combiner Box For 6 or 8-String PV Systems Models (SKU):6-String - SCB2-68-String - SCB2-8 Features Available for 6 or 8 String Configuration Continuous Duty Rated at 1000V DC Touch-safe Fuse Holders - 30 Amps Max Rating All UL Compliant Components NEMA 4, 4X UL Listed Enclosure...

solarpowercombinerbox.com

Maybe:

https://www.midnitesolar.com/productPhoto.php?product_ID=509&productCat_ID=48&sortOrder=4&act=p

 

[BackCountry]

Maybe:

Solar Power Combiner Box For 6 or 8-String PV Systems

Solar Power Combiner Box For 6 or 8-String PV Systems Models (SKU):6-String - SCB2-68-String - SCB2-8 Features Available for 6 or 8 String Configuration Continuous Duty Rated at 1000V DC Touch-safe Fuse Holders - 30 Amps Max Rating All UL Compliant Components NEMA 4, 4X UL Listed Enclosure...

solarpowercombinerbox.com

Maybe:

https://www.midnitesolar.com/productPhoto.php?product_ID=509&productCat_ID=48&sortOrder=4&act=p

Those are very nice — I hadn’t seen the first manufacturer.

Unfortunately they’re DC only. I need something that’s 480v AC three phase listed.

 

[electrofelon]

How about a Siemens P1 panelboard, have you priced that out?

https://www.cityelectricsupply.com/siemens-p1e18mc250at-three-phase-p1-unassembled-lighting-panel-250a-18-circuits-aluminum-bus

Why NEMA 4?

 

[BackCountry]

How about a Siemens P1 panelboard, have you priced that out?

https://www.cityelectricsupply.com/siemens-p1e18mc250at-three-phase-p1-unassembled-lighting-panel-250a-18-circuits-aluminum-bus

Why NEMA 4?

We don’t have great Siemens distribution here. I’ll look though.

NEMA 4 so I can lay it on its back, there isn’t anything tall on this site to mount it to, so I’d have to make up a strut backboard. This job is micros, no inverter or anything to share a backboard with.