Balance of System Components - EG4 Community Forum

GridBoss Energy Metering

DavidK_MT — Thu, 15 Jan 2026 03:30:10 +0000

I have heard that the EG4 GridBoss's CTs might not be revenue grade and also register inaccurate power/energy readings. For instance, the CTs might pick up nearby Current fields and skew what they need to be reading. Does anyone have additional info on this? I am trying to reconcile the energy bill of a client, and things are just not adding up.

GridBoss Communication DIP switches

weertske — Sun, 14 Dec 2025 21:55:20 +0000

@eg4eric

On the GridBoss, up in the low voltage comms area, are 3 sets of DIP switches.

CAN which is set to on
4G which is set to on
Wifi which is set to off

The CAN setting makes sense to me. However, I am not crazy about giving anyone access to my MID so why is there a 4G switch and why is it set to on? Also what is the purpose of the Wifi switch? The dongle is working yet the switch is set to off.

2152

GridBoss Smart Ports Load Shedding

Thomas — Tue, 05 Aug 2025 22:38:31 +0000

I have a GridBoss, FlexBoss21, 14.3kWh All Weather Battery, and a Briggs & Stratton 22kW Propane Generator. When testing "Off Grid" or "Backup" mode I quickly realized that if we run too many electrical loads the Inverter will shut down. Is there any way to setup Smart Ports to "Load Shed" based on Amp draw from Limited 50 Amp Capacity of FlexBoss21? I understand they can be set based on Time, SOC, or Volt - but if they can't be set to Total Amp Draw with Loads Shed according to their priorities, you would basically have to "Lock-Out" / "Disable" loads that would Overload the Inverter - and turn them on and off manually as needed - that's not "Smart"

Coming from the Generator world where Loads are shed based on either Generator Frequency (to prevent generator from bogging and shutting off) or Total Amp Draw based on Genset kW - it surprises me that the Smart Ports are not configurable to prevent overloading the Inverter. That boggles my mind. I would have to setup an additional Load Shedding setup by PSP to shed based on Total Amp Draw from Inverter. All the parts and components are there to Shed Loads in the GridBoss based on Amp Draw (CT's on Inverter and on/off of Smart Load). If this isn't an option, do you intend on making it an option?

Chargeverter with 2 wall mount batteries

Joel Brodeur — Mon, 23 Jun 2025 21:56:06 +0000

Here is my intended use case:

if my prime generator fails to start on some cold wintery day and I need to swap to a backup gen that has a higher harmonic distortion I would like to include a chargeverter into my system.

I want my inverter to be the control for the close loop communication not the chargeverter.

I want it completely manual - NO gen-start on it, as my backup gen does not have 2-wire start.

I just want the chargeverter to charge the batteries until they are full and then stop charging even if the gen continues to run.

Is that possible?

Also, if it is possible, what would be the best method for wiring to the batteries. Neg to one battery and pos to the other battery? or just neg and pos to the same battery?

Thanks,

Missing Chargeverter mounting bracket

coolcat — Tue, 03 Jun 2025 23:03:45 +0000

My Chargeverter came with only one mounting bracket, should I be planning to fabricate my own second bracket or is there a plan to ship out the second bracket to owners who only received one?

BossBox - GridBOSS and FlexBOSS

chill633 — Mon, 28 Apr 2025 15:58:19 +0000

The BossBox is touted as being able to handle 2 inverters, mounted on the sides of the box, with 2 or 3 batteries inside. Instead of 2 inverters, can you mount 1 FlexBOSS and 1 GridBOSS on the sides, with 3 batteries inside? Can you route the FlexBOSS --> GridBOSS cabling through the inside of the box?

brightmount extension

kubota — Mon, 30 Dec 2024 18:54:19 +0000

the brightmount cat 1 user manual depicts an extension kit to allow wider panels to be mounted.

no where can i find a part number to order one. are these still available?

Extra Mid Clamps for BrightMount

catof250 — Fri, 20 Dec 2024 19:43:02 +0000

The BrightMount system will hold 4 large panels with the mid-clamps provided. However I have 6 200 watt panels that I want to use. There is plenty of space for the 6 panels, but not enough clamps. I have been trying to source additional clamps with no success.