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Sol-Ark vs EG4 - Which is Solar Inverter Is Best For Your Home?

The Solar Lab

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🛒 EG4 FlexBOSS21 ➡ https://signaturesolar.com/eg4-flexbo...
➡ Get $50 OFF with Discount Code: THESOLARLAB50

🛒 Sol-Ark 18K-2P ➡ https://shopsolarkits.com/products/so...
➡ Get 4% Off with Discount Code: THELAB

🎥 Full Reviews
➡ EG4 FlexBOSS21 Review: EG4 FlexBOSS21 First Look - This Inverter ...
➡ Sol-Ark 18K-2P Review: The BEST Hybrid Inverter? - Sol-Ark 18k 2PLV

⚡ Find Your Perfect Power Station: https://www.thesolarlab.com/ps-quiz

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⚡ Read Our Full Written Review: https://www.thesolarlab.com/review/eg...

🔌 Access In-Depth Reviews, Guides & More: https://www.thesolarlab.com/

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0:00 - Intro
1:20 - Spec Teardown
5:03 - FlexBOSS21 Edge
8:10 - Sol-Ark 18K-2P Edge
9:59 - Summary

The EG4 FlexBOSS21 vs Sol-Ark 18K-2P is one of the most requested solar inverter comparisons, and in this video, we put these two powerhouse hybrid inverters head-to-head to see which one offers the best value for your home backup and off-grid solar system. We compare solar input, output power, idle consumption, battery compatibility, monitoring software, customer support, smart load management, and overall user experience. Is the premium, installer-favorite Sol-Ark 18K-2P worth the extra money, or does the EG4 FlexBOSS21 paired with the GridBOSS deliver more features and better bang for your buck? Watch our full comparison to find out which inverter we recommend for homeowners, DIY solar enthusiasts, and anyone building an energy-independent home.

We maintain an affiliate relationship with some of the products reviewed, which means we get a small percentage of a sale if you click our links, at no cost to our viewers.

20 Comments

@TheSolarLab Creator 2 months ago (edited) Pinned

🛒 EG4 FlexBOSS21 ➡ https://signaturesolar.com/eg4-flexboss21-16kw-ac-hybrid-inverter-48v-split-phase-21kw-pv-input/?ref=thesolarlab
➡ Get $50 OFF with Discount Code: THESOLARLAB50

🛒 Sol-Ark 18K-2P ➡ https://shopsolarkits.com/products/sol-ark-18k-2p?ref=TheSolarLab
➡ Get 4% Off with Discount Code: THELAB

🎥 Full Reviews
➡ EG4 FlexBOSS21 Review: https://www.youtube.com/watch?v=jB76VRwxOO8
➡ Sol-Ark 18K-2P Review: https://www.youtube.com/watch?v=Vkn0eoHr17U

⚡ Find Your Perfect Power Station: https://www.thesolarlab.com/ps-quiz

🛒 Shop Our Favorite Products on Amazon: https://www.amazon.com/shop/tsl047

🔔 Subscribe to our YouTube Channels
➡ https://www.youtube.com/@TheSolarLab
➡ https://www.youtube.com/@TheSolarLabPlus

Shop Our Favorite Brands & Discount Codes ↓↓↓

🛒 Signature Solar: https://signaturesolar.com/?ref=thesolarlab
➡ $50 Off With Code THESOLARLAB50

🛒 Pecron: https://www.pecron.com/#ref=229
➡ 5% Off with Code THESOLARLAB5

🛒*EcoFlow:* https://us.ecoflow.com/?aff=925
➡ 5% Off with Code EF26TSL5

🛒*BLUETTI:* https://www.bluettipower.com?aff=22
➡ 5% Off with Code THESOLARLAB5

🛒*ANKER SOLIX:* https://ankerfast.club/anker.solix_tsl
➡ 5% Off with Code THESOLARLAB5

🛒*Jackery:* https://www.jackery.com/?utm_source=affiliatly&utm_medium=affiliate&utm_campaign=affiliatelyus&aff=2419
➡ 5% Off with Code JASOLARLAB

🛒 ShopSolar: https://shopsolarkits.com/collections/promotions?ref=TheSolarLab
➡ 4% Off with Code THELAB

🛒 WattCycle Batteries: https://www.wattcycle.com/pages/lithium-pps-batteries-deals?ref=glyrdtvp
➡ 6% Off with Code THESOLARLAB

🛒 OUPES: https://tidd.ly/3KFFyo4
➡5% Off with Code THESOLARLAB

--------------------------------------------------------------------------------------------------------------------------------------------------

⚡ Read Our Full Written Review: https://www.thesolarlab.com/review/eg4-flexboss-21-hybrid-inverter-review

🔌 Access In-Depth Reviews, Guides & More: https://www.thesolarlab.com/

--------------------------------------------------------------------------------------------------------------------------------------------------

0:00 - Intro
1:20 - Spec Teardown
5:03 - FlexBOSS21 Edge
8:10 - Sol-Ark 18K-2P Edge
9:59 - Summary

The EG4 FlexBOSS21 vs Sol-Ark 18K-2P is one of the most requested solar inverter comparisons, and in this video, we put these two powerhouse hybrid inverters head-to-head to see which one offers the best value for your home backup and off-grid solar system. We compare solar input, output power, idle consumption, battery compatibility, monitoring software, customer support, smart load management, and overall user experience. Is the premium, installer-favorite Sol-Ark 18K-2P worth the extra money, or does the EG4 FlexBOSS21 paired with the GridBOSS deliver more features and better bang for your buck? Watch our full comparison to find out which inverter we recommend for homeowners, DIY solar enthusiasts, and anyone building an energy-independent home.

We maintain an affiliate relationship with some of the products reviewed, which means we get a small percentage of a sale if you click our links, at no cost to our viewers.

@dupstepuser123 2 months ago

@thesolarlab Robbie I just want to say I miss your car videos. You were a huge inspiration to me and I’m a mechanic now at a Honda dealership. They’re sending me to school in September so I can get my Honda master technician certification. Ive been a technician for 3 years now. Thank you for giving me the confidence to go after something I enjoy.

@ericmatthews7264 3 months ago

I installed the Solark 15 emp hardened three years ago on my house. Right after I installed it a ton of new options hit the market. I don’t know that I would’ve picked another one, I’m happy with what I have. But I did spend a lot more for it than what I can get now without as much options.

@ericmatthews7264 3 months ago

Don’t make my mistake, when you install the Solark take the plastic screen protector off right away. The sun will bake it on even if it’s not indirect sunlight and it’ll leave the screen hazy.

@kimnach 3 months ago

I really wanted to go with the Schneider Context series. Unfortunately, space limitations for what I ultimately wanted was something I couldn't get past. Then I considered either the Sol-Ark or EG4 18kPV. But then the Gridboss was introduced and that swayed me. I purchased and commisioned one GB, FB21, and one EG4 indoor wall-mount battery before the 30% tax credit was eliminated. Near future plans are one more FB21, two 16kWhr batteries, and 4kW solar. Now that my wife and I are retired, the system will eventually grow to a third FB21, more solar, and more batteries.

@BB-df2dn 3 months ago

My experience with SS, I end up fixing the problem before they can find the solution. Maybe my problems was unique or just being on site with knowledge made it quicker for me to figure out the issue.

@ModQuad-l6z 2 months ago

You can easily mount the Flexboss LCD to the front of the cabinet above the door.

@xkguy 2 months ago

Had a close lightning strike and one of my 4 year old inverters (6500 EX48) quit working. EG is replacing it. Great service!!!

@bthemedia 1 month ago

3:48 EG4 offline updates on your own… great feature!

@AsForetold 3 months ago

We need a native 3-phase inverter review. The Sol-Ark 30K is too big for residential homes. If only Deye 15K made for the USA hadn't been banned by Sol-Ark we would have a modern solution that could also use high voltage batteries.

@DwayneSmith-y1d 1 month ago

Nice work bro so how can I get something like this am in Jamaica 🇯🇲

@LetsgoproDIY 1 month ago

Can you compare these two and see how loud they are and the heat levels using a thermal camera, at high outputs, etc

@garyjones101 4 days ago

I'd be curious if one can integrate the Flexboss21 and Gridboss, with the Homegrid batteries as a DC-coupled system?

@RedMike-ym8hd 3 months ago

Super useful comparison. However, that transition sound effect is really jarring!

@l2urik 3 months ago

I think Pytes V16 works perfectly

@VE5SAR-HamaRamaDingDong 3 months ago

Nice overview. Two topics I was hoping you would have mentioned would be a comparison of EMP protection between the two, as well as any failure stats that are available from long-term users. I don't know if the vendors publish those stats... but I suspect they would - IF they were favourable. 🙂

@wm79198 2 months ago

Picked the wrong eg4 product. The flexboss is designed for the gridboss, you should have compared the solark to the 18kpv

@Mike__B 3 months ago

So if I already have a solar system with a grid tied inverter how difficult is integrating something like this into an already existing system? Or would you need to change out the existing inverter for say the Gridboss + Flexboss?