FlexBOSS21 & GridBOSS Build

Sharing the full journey—from unboxing gear to flipping the final breaker.

This is an ongoing real-world solar install on a Texas homestead. Watch, learn, and build your own system.

A HANDS-ON BUILD OF THE EG4 FlexBOSS21 + GridBOSS SYSTEM

This install features a robust, scalable solar system using EG4’s top-of-the-line gear. Whether you’re DIYing your own solar system or just curious, this series walks through the entire process.

Hey, I'm

Eric from East Texas Homestead

I’m not a licensed electrician—but I’ve built multiple working off-grid and hybrid systems from scratch, and I’ve helped thousands of viewers understand solar without fear.

This page is your one-stop shop for:

Daily YouTube Shorts
Longform builds
Affiliate gear links
Lessons learned from real experience

Quick Boss Build updates

Daily Shorts

FlexBOSS21 & GridBOSS Build – Batteries in Parallel & Conduit Run | Day 5

#FlexBOSS21 & #GridBOSS Build – Mounted the FlexBOSS21 on the Wall! | Day 4

FlexBOSS21 & GridBOSS Build - Here’s The Batteries!

FlexBOSS21 & GridBOSS Build – Wall Mount Battery Stack Complete | Day 3

Gear & Parts List

EG4 FlexBOSS21 INVERTER

The heart of our hybrid solar power system – combining serious performance with DIY simplicity.

16kW split-phase AC hybrid inverter with up to 21kW of solar PV input
Ideal for off-grid solar systems, battery backup, or grid-tied hybrid setups
Built-in MPPT charge controllers, Wi-Fi monitoring, and generator support
Rapid shutdown ready, NEC 2020 compliant features, and scalable battery compatibility
Designed for whole-home power, homesteads, and solar-powered shops

EG4 FlexBOSS21 inverter is the core of this off-grid solar build. It’s a powerful, all-in-one inverter solution that makes it easy to control your entire solar system — from PV charging to battery storage to grid interactions.

Shop the FlexBOSS21 Inverter

EG4 GridBOSS Service Panel

A smarter, cleaner way to connect your off-grid or hybrid solar system to your home.

200A service entrance-rated load center — perfect for whole-home installs
Combines main breaker, generator input, and load management in one UL-listed panel
Cleanly integrates with inverters like the FlexBOSS21, FlexBOSS18, 12Kpv, and 18Kpv
NEC 2020 compliant, with space for dual inverters or future expansion
Ideal for hybrid solar setups, backup power systems, and off-grid builds

The GridBOSS replaces the clutter of multiple breaker boxes and transfer switches with one sleek, professional-grade panel. Designed for high-power solar installs, it simplifies wiring, saves wall space, and helps you meet code faster.

This is the panel we used to keep everything clean, future-ready, and inspector-friendly.

Shop the GridBOSS