EG4 GridBOSS Deep Dive

[James Showalter]

You have to have a bypass and a fused knife disconnect, meter-main hasn't ever passed for our installers

 

[famtraveler]

Hi all. I have a stand alone meter that sits between 2 200A service panels. I am backing up one service panel with an existing Enphase system, and I am now looking to back up the second service panel with PV, 12kpv, PowerPro and Grid Boss.

Because there is a 200A disconnect on the service panel that will serve as the backed up loads panel for GridBoss purposes, is it necessary to place a second disconnect after the meter but before the GridBoss Grid connection? I would assume yes, but want to confirm.

Thx.

 

[FilterGuy]

Hi all. I have a stand alone meter that sits between 2 200A service panels. I am backing up one service panel with an existing Enphase system, and I am now looking to back up the second service panel with PV, 12kpv, PowerPro and Grid Boss.

Because there is a 200A disconnect on the service panel that will serve as the backed up loads panel for GridBoss purposes, is it necessary to place a second disconnect after the meter but before the GridBoss Grid connection? I would assume yes, but want to confirm.

Thx.

The GridBOSS is service entrance rated so it should not have to have a separate grid disconnect. However, you should check with your POCO and AHJ. They sometimes have requirements over and above what the NEC would require.

 

[dougbert]

Combination Service Entrance Device

Is it better to just call it a meter-main? I saw someone drop CSED a couple times in a thread and thought that might be the cool new GenZ way to call it

I have been referring to that because Square D ads have been using that
I installed a 125amp CSED on my house 28 years ago, but that is not what it was called then

here is the one I am considering now that uses the term

Square D Homeline 150 Amp 8-Space 16-Circuit Outdoor Ring-Type Surface Mount Solar-Ready Main Breaker Plug-On Neutral CSED SC816F150PS - The Home Depot

Update your commercial power distribution system with Square D Homeline Outdoor RingType Surface Mount SolarReady Main Breaker PlugOn Neutral CSED.

www.homedepot.com

 

[garybertz]

I have a meter outside with no exterior disconnect till the 200a house panel.... can I install gridboss indoors so the 200amp eaton breaker disconnect will be indoors? Also the rsd switch would be out doors right next to the meter

 

[spiker611]

I have a meter outside with no exterior disconnect till the 200a house panel.... can I install gridboss indoors so the 200amp eaton breaker disconnect will be indoors? Also the rsd switch would be out doors right next to the meter

This is a good question for your utility / inspector.

 

[edward4]

Can double lugs be used on the backup load side? If yes any recommendations?

 

[chill633]

I have a meter outside with no exterior disconnect till the 200a house panel.... can I install gridboss indoors so the 200amp eaton breaker disconnect will be indoors? Also the rsd switch would be out doors right next to the meter

Service Disconnect/Emergency Disconnect (NEC 230.85) is supposed to be outside. The purpose is for emergency first responders to be able to quickly cut power.

For one- and two-family dwelling units, all service conductors shall terminate in disconnecting means having a short-circuit current rating equal to or greater than the available fault current, installed in a readily accessible outdoor location.

If the GridBOSS is acting as that, then it needs to be outside. If you have a separate SD/ED installed outside, then you don't need the Eaton breaker in the GB, which is why it is marked as "optional" in the maual. Remember, ground and neutral is bonded at the first point of disconnect and nowhere else, so that means SD/ED.

 

[Hungfish]

Folks,
EG4 will be publishing the following diagram on their website within a few days, but they have given me permission to share it early.
View attachment 256000


Notice the part I highlighted with the purple dashed line. It shows a way to deal with POCOs that insist on production meters and/or disconnects.
(I have asked for a version that shows only one inverter. I will provide it if I get it. However, I suspect it will be the same thing but without the combiner boxes.)

@FilterGuy is there output on the load port of the inverter (can i output to another panel or an EV outlet from there?)