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eg4|SKU:1511048

EG4 GridBOSS MID 200A Service Entrance — All-In-One ESS Integration

Centralize Your Off-Grid Power Distribution

One box, ten components — Replaces breakers, transfer switches, and more with a single device
22 kAIC main breaker — Delivers powerful service integration for your ESS
Remote system control — Adjust settings anywhere via the EG4 app
Multi-source connectivity — Supports 3 inverters, generator, and 4 smart ports
  • FREE System Design Consultation -- Our engineers confirm every breaker and connection before you order
  • FREE Shipping -- Ships free, including LTL freight on large orders
  • Compatibility Guarantee -- Pre-vetted to work within your ESS architecture

$1,755.95

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EG4 GridBOSS MID V 3.1 200A Service Entrance
EG4 GridBOSS MID V 3.1 200A Service Entrance
$1,755.95

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In the box

  • EG4 GridBOSS MID V 3.1 200A Service Entrance unit
  • Documentation
EG4 GridBOSS MID V 3.1 200A Service Entrance
EG4 GridBOSS MID 200A Service Entrance — All-In-One ESS Integration
$1,755.95

Centralize Your Off-Grid Power Distribution

The EG4 GridBOSS MID replaces up to 10 separate components—breakers, transfer switches, and more—with one integrated unit. Connect your utility, inverters, generator, and loads from a single, field-tested panel. Built for grid-independent setups, it delivers real-time remote monitoring through the EG4 app so you stay in control of your off-grid system from anywhere. A 22 kAIC main breaker provides reliable service integration for serious energy storage builds.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
200A Main Breaker
22 kAIC Rating
All-In-One Integration
Remote EG4 App Control
10
Components Replaced
125A
Max Generator Input
3
Hybrid Inverters Supported
Eliminate the patchwork wiring nightmare

Eliminate the patchwork wiring nightmare

Most off-grid builders end up with a wall of mismatched breakers, transfer switches, and bus bars sourced from different vendors—hoping everything talks to everything else. The EG4 GridBOSS MID ends that. It replaces up to 10 separate components with one off-grid proven enclosure that connects your utility feed, generator, and up to three hybrid inverters through a single, field-tested hub. At Off Grid Vault, every system package is pre-vetted for compatibility—this unit integrates directly with your inverter architecture without guesswork. Your battery bank, your charge controller, your inverter: they all land in one box, wired once, working together from day one.

Centralized control for your entire power architecture

Centralized control for your entire power architecture

The GridBOSS MID gives you a single command point for utility power, generator input, and up to three hybrid inverters rated at 90A each. Four smart ports ranging from 60A to 125A handle your critical loads. A 22 kAIC main breaker rating means this unit is built to handle serious fault currents—not a residential light switch dressed up as industrial gear. Automated power management optimizes your battery performance without manual intervention, and the EG4 app lets you monitor and adjust settings remotely. Whether you are managing a cabin ESS or a full homestead setup, every source and load converges here.

Know exactly what breakers you need before you wire

Know exactly what breakers you need before you wire

The GridBOSS MID requires specific breakers depending on your inverter choice—and the product data is upfront about that. A 70A breaker pairs with the EG4 18kPV. A 50A breaker works with the EG4 12kPV. A 125A breaker serves either the Smart Port or Gen Port. The 200A main breaker (Eaton 200A CSR25K) is sold separately. No hidden add-ons, no surprises mid-install. Off Grid Vault includes a free system design consultation with every purchase—tell us your inverter model and we confirm every breaker, every connection, every specification before your order ships.

Electrical Compatibility Check

Confirm your system matches these connection parameters before ordering.

  • Generator rated at 125A or below
  • Each hybrid inverter draws no more than 90A
  • Smart port loads fall within 60A to 125A range

Where the GridBOSS Fits

Built for centralized control across multiple off-grid and backup power architectures.

Homestead ESS Builds
Generator Backup Integration
Solar + Storage Panel Consolidation

Full specifications

At a glance

Dimensions
See product page
Compliance
See product page
Warranty
See product page
Full specifications12 data points across 4 categories

Dimensions

DimensionsSee product page

Power & Performance

Main Breaker200A
Interrupting Rating22 kAIC
Generator SupportUp to 125A
Inverter Support3 hybrid inverters up to 90A each
Smart Ports4 ports ranging from 60A to 125A
EG4 18kPV Breaker70A (sold separately)
EG4 12kPV Breaker50A (sold separately)
Smart/Gen Port Breaker125A (sold separately)

Materials

ConstructionSee product page

Compliance & Warranty

ComplianceSee product page
WarrantySee product page

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. If it doesn't meet our standards, it doesn't make the cut.

Authorized EG4 DealerWarranty claims go through us — not a ticket queue. We stand behind every unit we sell.
Free System Design ConsultationOur engineers size your system for your actual consumption. No guesswork, no incompatible components.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right. Ships free on all orders.
★★★★★
“I replaced a wall of mismatched breakers and two transfer switches with this single enclosure. My EG4 18kPV, generator input, and house loads all terminate in one box now. Wiring was straightforward once I had the correct branch breakers—which Off Grid Vault helped me confirm before I ordered. Clean install, solid build quality, and the EG4 app shows me exactly what is happening with my system in real time. This is how ESS integration should work.”
F
First L.Prescott, AZ

EG4 GridBOSS MID 200A Service Entrances

The EG4 GridBOSS MID streamlines your Energy Storage System (ESS) by combining up to 10 components into one powerful, integrated unit. Designed for seamless connectivity with utilities, generators, inverters, and loads, it provides centralized control, effortless installation, and real-time remote monitoring.


EG4 GridBOSS MID V2 SPECS and Features

  • Connect and manage utility, inverters, generator, and loads from a single device.
  • Replace breakers, transfer switches, and more with one compact solution.
  • Reliable with a 22 kAIC main breaker for powerful service integration.
  • Automate power management to optimize battery performance.
  • Access and adjust settings remotely via the EG4 app or monitoring system website.
  • Supports one generator up to 125A, 3 hybrid inverters up to 90A each, and 4 smart ports ranging from 60A to 125A.
  • You must purchase a 70A breaker separately for use with the EG4 18kPV Hybrid Inverter.
  • You must purchase a 50A Breaker separately for use with the EG4 12kPV Hybrid Inverter.
  • A 125A Breaker (sold separately) can be used with either the Smart Port or Gen Port.
  • 200A main breaker not included (must be purchased separately; model required: Eaton 200A CSR25K, not available through Signature Solar. See manual for more information).
  • Voltage: 120/240VAC
  • Max Current: 200A
  • Hybrid Ports: 3 (up to 90A each)
  • Smart Ports: 4 (up to 125A)
  • Operating Temp: -40°F to 140°F
  • Warranty: 10 years
  • Certifications: UL Certified, compatible with Eaton 200A main breaker model CSR25K


Your Satisfaction with EG4 is Guaranteed:

  • Lowest Price Guaranteed

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Frequently Asked Questions

When you piece together a breaker box, transfer switch, generator input, inverter disconnects, and load centers separately, you are buying multiple enclosures, additional wiring, and extra labor hours. The GridBOSS MID consolidates up to 10 components into one unit. You are paying for integration—not individual parts. Factor in the installation time saved and the eliminated risk of incompatible components, and the value is straightforward.
Yes. Off Grid Vault is an authorized dealer for EG4 and other major brands including Sol-Ark, Victron, and Schneider Electric. Warranty claims go through us directly—not a third-party ticket queue. If something fails under warranty, you deal with our team, not a generic marketplace seller who cannot help you troubleshoot your ESS architecture.
The GridBOSS MID supports up to three hybrid inverters at 90A each, one generator up to 125A, and four smart ports from 60A to 125A. Specific breaker requirements vary by inverter model: 70A for the EG4 18kPV, 50A for the EG4 12kPV. Contact us with your inverter specs and we will confirm compatibility through our free system design consultation before you purchase.
kAIC stands for kilo-Ampere Interrupting Capacity—the maximum fault current a breaker can safely stop without catastrophic failure. A 22 kAIC rating means this unit can handle the fault currents typical of 200A residential service entrances. Lower-rated breakers may not clear a short circuit safely, putting your entire ESS at risk. This rating confirms the GridBOSS MID is built for serious, grid-independent power systems—not light-duty applications.
No. The 200A main breaker is not included and must be purchased separately. The required model is the Eaton 200A CSR25K. Additionally, branch breakers for your specific inverters (70A for the EG4 18kPV, 50A for the EG4 12kPV, 125A for Smart Port or Gen Port) are also sold separately. We list these requirements plainly because hidden add-ons are the reason buyers lose trust in this industry.
Installation time depends on your existing setup and whether you are retrofitting or building new. Because the GridBOSS MID replaces up to 10 individual components, most installers report significant time savings compared to assembling a traditional breaker-and-transfer-switch layout. We recommend scheduling your free system design consultation before ordering so we can help you plan the installation sequence and identify any additional materials you will need on site.
SKU: 1511048 Categories: , Brand:

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. If it doesn't meet our standards, it doesn't make the cut.

Authorized EG4 Dealer Warranty claims go through us — not a ticket queue. We stand behind every unit we sell.
Free System Design Consultation Our engineers size your system for your actual consumption. No guesswork, no incompatible components.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right. Ships free on all orders.

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About eg4 Micro-Grid Interconnection Device

eg4 is a trusted manufacturer of premium micro-grid interconnection device. OffGridVault is an authorized dealer offering the full eg4 lineup with free delivery, price match guarantee, and expert support.

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