From DIYer/RV Solar To Whole-home Backup — EG4’s Glow-up Explained Watts Up Solar podcast

From DIYer/RV solar to whole-home backup — EG4’s glow-up explained

3d ago 15:01

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At InterSolar Texas 2025, I caught up with John Tostanoski from EG4, and we went deep on where the brand is headed next.

EG4 built its name on making solar accessible – RVs, off-grid cabins, and DIY systems that regular people could actually understand and install.

Now they’re stepping into a much bigger arena:

FlexBoss 21 whole-home backup inverter (21 kW DC input, 16 kW continuous with PV)
GridBoss microgrid interconnection device (MID) with smart load shedding and generator support
New 16 kWh indoor wall-mount LFP battery with auto-addressing and active balancing
Long-term roadmap to three-phase commercial products
A domestic content battery built with LG cells made in Michigan and assembled in Commerce, Texas
Future 100V architecture for better charge/discharge performance and smaller cabling

We talk about:

How EG4 evolved from a house brand at Signature Solar to a full OEM
Why domestic content matters for third-party ownership and financing
What pro installers need to know about EG4’s ecosystem
How you can scale FlexBoss, GridBoss, and multiple batteries within code limits
Why 48V isn’t going away anytime soon, even as 100V systems emerge

Suppose you’re a solar installer, designer, distributor, or advanced DIYer thinking about whole-home backup or domestic content requirements. In that case, this episode will give you a clear picture of where EG4 is heading.

Connect with EG4:
Website: eg4electronicsics.com
YouTube: EG4 Electronics

Connect with Emmitt:
Watts Up Solar Podcast on YouTube: @wattsuppod
Fractional Training & Field Enablement: sepowerconsulting.com

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