EG4 FlexBOSS21 & GridBOSS Premiere Interview: The Most Powerful Solar Solution Yet

So who is going to install these things to make sure a homeowner wont screw something up .and does this have to have internet in order to work

That was a ton of information, thank you for that interview! With the one wire system and all of the sensors and logic, can you now do load-side AC coupling? i.e. microinverter panels on your garage that can back-feed to your gridboss at your house

terrible customer service with Signature Solar. I advise people to go to Current Connected where they have great customer service, and a good technical team that can help you along your journey.

Want to buy from Bangladesh

I'm concerned about these tariffs in 2025. Hopefully the industry is working to get an exception.

This dude knows his products! Very impressive !

Is this also EMP proof?

Seems like it could be good for a small off-grid place. Based on James' comments, I think a grid-tie 400a service would be much more difficult with it. Probably better with 18kPVs and SPAN.

The spec is important for locations that use these inverters for UPS without solar (apartments, condos, etc)

I've ordered the FlexBoss21 and plan to add the Gridboss later. Thank you both for the video!

I'm thinking as James whips through all the numbers off the top of his head (input, output, amps this, watts that) that you guys could have some white board diagram showing ALL the connection ports of the units and show the min and max #'s of input and output. That way we would SEE what James intuitively knows. Too much, too fast. You market to DIY'ers, yet James is like an Indy car.

What inverter product does EG4 have that is legal in California and can be installed between the meter and branch circuit breakers such that grid can be fed to the breakers when no solar or battery are available, but solar or battery are not fed back to the grid? My understanding is that some inverters do this but not at the absolute 100% "no back feed" level that is required. Also, there is proper industry vocabulary for these issues, product functions, and perhaps you can fill me in. Thx!

I am a complete newbiei but I am totally impressed with your products

I have a Generac whole home generator with an auto-transfer switch. Is that compatible with the grid boss or would the auto-transfer switch need to be removed?

I have mine ordered. Glad i watched this, as the video brings more clarity on the purpose of the flex boss. Thank you!

I'm not seeing how I eliminate transfer switch? If the gridboss goes down and I have to remove it and rma it...won't I still need a transfer switch?

I've already ordered both Flex boss and Grid boss units. Can't wait to get them. 😊 Gonna hook'em up to 40 410 watt panels and 45kwh batteries! 😊

I guess I'm at a loss in the cost savings and complexity world. It still feels to me that the main point of all this tech is to be off grid. So I'm not clear why adding complexity and cost.

It’s like you split the 18KPV into two components, boosted the power a bit and gave it a new name. Not that there is anything wrong with that!! I kind of like the idea of having one component on the wall better than two.

I realize that not many people are affected by this but I live at 8,500ft in the Rockies and the altitude limit is 2,000m or about 6,500ft. Does this void the warranty and is there any way to install these units at 8,500ft?

It sounds like u can mix a flex21 and a 18k. But not sure.

I just don’t understand why not 200 amp transfer switch on the flex boss

Thanks for the video. Do I understand it correctly that the Grid/Flex combo requires fewer external components and associated labor? Does it bring the total cost of the system closer to one based on the 18KPV?

Does your home panel have to be 200 Amp? And how much can be back fed into the public grid with hybrid inverter ? More with 200amp service?

I knew I was waiting for some reason

When are you guys going to start getting with the new technology that's coming into the market ..regarding high voltage inverters and batteries. 48v isn't where the market is anymore and is completely inefficient and incapable of meeting today's needs.

I’m interested in more of these integrated smart breakers in your off grid focused inverters. I’d love to dump all excess solar through an electric boiler to put additional heat into my slab foundation or run multiple mini splits at certain states of charge. The newer smart load centers don’t do much for us off grid guys if they arnt talking to our batteries.

Now just answer the phone and emails ...after the sale and provide a quick resolution even if it means warranty. That's your downfall is how you treat customers after the sale is made.

EG4, if you're listening, your next innovation should have a DC smart port with an EVSE addon. This would enable DC charging to an EV bypassing any need for an inverter and conversion losses. 🙏🏽

Can GridBoss be used with a 100amp breaker, only see CSR2200N in the specs? Want to feed 100amp from main panel to grid boss that now goes to a sub panel. This will allow me to backup all critical loads in sub panel as well as have smart loads (EV, water heater, etc). Can't sell back here so will only use in off grid mode but the flexibility of the grid-boss makes setup and expansion so much easier.

I need a setup/demo video comparing and contrasting potential on grid setups with this vs the 12 and 18k. He makes fair points with less conduit and wiring but I’m not sold.

If you see it as next level then please build it, demonstrate, and compare real-world numbers.

AC coupling only works with eg4 inverters? No solaredge or ephase?

How are you able to connect the flex boss to the grid boss with a single line connection?

I wana run 3 flex boss 21 threw one grid boss.. living dangerous

DIY solar technology has been improving at a rapid pace but EG4 has been on the bleeding edge over the past 3 years and their products outperform other bigger names like Tesla at way less than half the cost. They’ve made it possible for many folks to build solar systems that enable their homes to run off solar 24/7. We started out with a small EG4 inverter and expanded it into a system that took us off the grid. Amazing. Thank you James and everyone else at SS for constantly pushing the envelope with home solar technology!

@EG4 is the absolute best in the biz!!!! These guys are doing it right and we’re moving their products like it’s going out of style. 🙌🏻🙌🏻🙌🏻🙌🏻🙌🏻🙌🏻
Keep it up fellas!

The gridboss is epic. really well done!!!

Could you imagine the cost for the same system spec for spec on enphase?? You guys are doing fantastic work keep it up!

Can the flex boss not export to the grid on its own? Is it possible to limit the current to the grid[boss]? Ie, if you already have a 25A line run across your house?

Wait, the three hybrid inverter ports only work with EG4 inverters? That is a huge bummer. If it worked with existing installations (Enphase or other) the GridBoss would start a whole new and really useful niche by itself. A smart transfer switch for all sources: grid, generator, EG4, or existing inverters, and load shedding.

Good stuff EG4

The FlexBOSS21 looks like just what I need. By chance is it able to communicate with a Span smart breaker panel for shedding? If not could it in the future?

after 30 years with my photon harvesters, this great new tech solves SO many problems. Love it and a great video, keep going

Please consider releasing a meter collar controlled by the Gridboss. That would IMMENSELY simplify installation. A meter collar would mean zero mods to the heritage service panel.

Last part about batteries being anywhere? Because you can move the inverter?

Will Gridboss work with other Eg4 hybrid inverters? like 12kpv or 18kpv?

RE: Firmware, are we able to update it online using wifi or in the app, or do we need to hook up a laptop and communicate using a serial cable? It would be nice to be able to do everything via the app.

Do I need to add EG4 Battery Chargers for Darkstart?

Nice! I’m glad I didn’t start my solar project yet…👍👍