A turnkey backbone for whole-home or cottage energy storage. This bundle pairs the EG4 FlexBOSS18 hybrid inverter with the GridBOSS micro-grid gateway, a 14.3 kWh indoor lithium battery, and a buildable conduit box for clean cable management. The matched components streamline CSA-compliant installation, maximize solar harvest, and give you closed-loop control through the EG4 app.

Package Includes

• 1 × EG4 FlexBOSS 18 hybrid inverter

• 1 × EG4 GridBOSS Micro-Grid Interconnect Device

• 1 × EG4 WallMount Indoor Battery – 14.3 kWh, 51.2 V, 280 Ah

• 1 × EG4 Indoor Buildable Conduit Box

Key Features

• 13 kW split-phase output, 10 kW battery discharge, up to 18 kW PV input (600 V DC)

• < 60 W standby draw and NEMA 4X enclosure for the inverter

• GridBOSS replaces transfer switch, combiner, and load panel with a single 200 A service-entrance gateway; four programmable smart-load ports; ~25 ms transfer time

• Indoor 14.3 kWh lithium battery with 600 A internal busbars, 140 A charge/discharge, and 224 W self-heating for cold climates

• Conduit box joins battery and inverter for code-friendly, low-profile installs; side knockouts support parallel battery runs

Specifications

FlexBOSS 18 Inverter

– Continuous output: 13 kW @ 240 V split-phase

– Battery discharge: 10 kW (208 A)

– PV input: 18 kW STC, 600 V DC max, 2 × 26 A MPPTs

– Grid passthrough: 90 A

– Idle consumption: < 60 W

– Dimensions / weight: 30.4 × 22.8 × 11.2 in; 115 lb

GridBOSS MID

– Service entrance: 200 A, 22 kAIC

– Hybrid inverter ports: 3 × 90 A

– Generator input: 125 A

– Smart ports: 4 configurable (125 A / 80 A / 60 A / 60 A)

– Transfer time: ~25 ms

– Dimensions / weight: 31.5 × 19.7 × 7 in; 55 lb

WallMount Indoor Battery

– Chemistry / voltage / capacity: LiFePO₄, 51.2 V, 280 Ah

– Energy: 14.3 kWh (usable 80 % DOD)

– Charge / discharge: 140 A continuous

– Self-heating element: 224 W

– IP rating: IP20 (indoor use)

– Dimensions / weight: 34.1 × 18.1 × 10.4 in; 286.6 lb

Indoor Buildable Conduit Box

– Purpose-built for FlexBOSS and WallMount series

– Protects cabling; side knockouts for parallel runs