Product Description

The EG4 GridBOSS is a 200A microgrid interconnection device (MID) that manages the connection between the utility grid, your solar and battery system, and your home's loads. It centralizes whole-home backup switching, generator input, and smart load management in a single enclosure — dramatically simplifying the installation of FlexBOSS-based home energy systems.

Why the GridBOSS

  • 200A service rating — integrates with a standard whole-home electrical service, not just a sub-panel of critical circuits
  • One enclosure, one point of control: grid, solar/battery, generator, and load connections all land in the GridBOSS instead of a wall of separate switchgear
  • Whole-home backup switching — automatic transfer when the grid drops, so the house rides through on solar and battery
  • Smart load management sheds low-priority circuits to keep essential loads running longer during an outage
  • Generator input built in for extended outages
  • Designed for EG4 FlexBOSS18 and FlexBOSS21 hybrid inverters

Who it's for

Anyone installing a FlexBOSS-based system who wants whole-home backup rather than a critical-loads panel. The GridBOSS replaces a pile of transfer switches, load-shed relays, and generator interlocks with one engineered device — which typically means less labor and a cleaner inspection.

Specifications

Type Microgrid interconnection device (MID)
Service rating 200A
Manages Grid, solar/battery, generator, and load connections
Backup Whole-home switching with smart load control
Pairs with EG4 FlexBOSS18 and FlexBOSS21 hybrid inverters
Form factor Single-enclosure wall-mounted installation
SKU INV033

Warranty

The EG4 GridBOSS carries a 10-year full parts-or-product replacement manufacturer warranty. EG4 requires warranty registration within the first year of purchase (or proof of purchase from an authorized distributor) to keep coverage valid.

Common questions

Do I need a GridBOSS for a FlexBOSS system?

Not strictly — a FlexBOSS can back up a critical-loads panel on its own. The GridBOSS is what turns the system into whole-home backup with automatic switching and load management at the 200A service level.

Does it work with generators?

Yes — generator input is built in, so a standby or portable generator can supplement solar and battery during extended outages.

Do I need an electrician?

Yes — the GridBOSS sits at the service entrance and interconnects with the utility. Installation must be performed by a licensed electrician and is subject to local permitting and utility interconnection rules.

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