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Description
EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV InputEG4 FlexBOSS18 Hybrid Inverter 48V Split Phase 18kW PV Input The EG4 FlexBOSS18 Hybrid Inverter is a powerful, all in one solution designed for homeowners, DIYers, and installers looking for a cost effective way to maximize energy efficiency. Whether youre building a fully off grid system or optimizing grid tied energy use, this inverter delivers professional grade performance at an accessible price. Key Features High Power Output 13kW continuous
EG4 FlexBOSS18 Hybrid Inverter | 48V Split Phase | 18kW PV Input
The EG4 FlexBOSS18 Hybrid Inverter is a powerful, all-in-one solution designed for homeowners, DIYers, and installers looking for a cost-effective way to maximize energy efficiency. Whether you’re building a fully off-grid system or optimizing grid-tied energy use, this inverter delivers professional-grade performance at an accessible price.
Key Features
✅ High Power Output
- 13kW continuous power with PV input
- 18kW max solar input
- 10kW continuous battery-only output
✅ Seamless Grid & Battery Integration
- Works in grid-tied, off-grid, and hybrid setups
- Supports closed-loop communication with EG4 batteries
- Compatible with the EG4 GridBOSS MID for advanced energy management
✅ Industry-Leading Compliance & Safety
- UL1741-certified for safety and reliability
- Built-in Rapid Shutdown (RSD) for NEC 690.12 compliance
- Multiple protection features, including PV reverse polarity, surge, and short-circuit protection
✅ Efficient & Cost-Effective Solar
- Up to 600VDC PV Input, eliminating the need for a combiner box
- Dual MPPT technology for optimized solar harvesting
- 94% battery-to-grid efficiency and 97.5% PV-to-grid efficiency
✅ Easy Installation & Monitoring
- Wall-mountable design with a compact footprint
- Plug-in Wi-Fi module for remote system monitoring via the EG4 app
- 90A grid bypass for seamless power flow
Why Choose the EG4 FlexBOSS18?
The FlexBOSS18 is engineered for those who want high performance without the high price. With increased PV capacity, hybrid capabilities, and certifications for grid compliance, it’s a future-proof investment for energy independence.
Pairing this inverter with the EG4 GridBOSS MID unlocks additional features like time-of-use optimization, load shifting, and backup prioritization—giving you full control over your energy system.
Specifications
🔋 Power & Output
- AC Output: 120/240V split-phase | 13kW max | 10kW battery-only
- Max PV Input: 18kW (600VDC) across two MPPTs
- Surge Capacity: 156A peak
⚡ Efficiency & Protection
- MPPT Efficiency: 99%
- Battery-to-Grid Efficiency: 94%
- Protection: PV reverse polarity, over-voltage, short circuit, AFCI, GFCI
📡 Connectivity & Control
- Wi-Fi App Monitoring for remote access
- Closed-loop communication with EG4 48V batteries
- Rapid Shutdown (RSD) & NEC Compliance
📏 Size & Installation
- Dimensions: 29.5" x 20.5" x 10.4"
- Weight: 115 lbs
- Mounting: Wall-mountable
Take Control of Your Energy Future
Whether you’re upgrading an existing system or building from scratch, the EG4 FlexBOSS18 delivers unbeatable performance and affordability. Shop now and make the switch to reliable, high-efficiency solar power!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
my all-time favourite skincare treatment
Scent: Collagen, Size: 4 Count (Pack of 1)
literally my favourite mask ever. I first received these as a gift 2 christmases ago and have continued buying them since. they provide almost an in-office feeling treatment. its a pain to wear it all night long, as I dont sleep well with them on but its worth it. your skin feels plump, super hydrated and radiant when you wake up and it last for days. the fit is okay but once you try this product, it won't matter as it is so effective. these are worth splurging on.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Absolutely amazing masks!!!
Scent: Collagen, Size: 4 Count (Pack of 1)
These masks are beyond amazing! I use one once a week and leave it on overnight after completing my p.m. skincare routine and wake up to smooth, plump, moisturized, and absolutely glowing!! I have extremely sensitive skin and eyes and these masks do not bother me at all. No burning in my eyes and no irritation of the skin. My deep wrinkles seem a lot less pronounced and some of my more fine lines almost disappear for 24 hours after using this mask. They are simple to use and adhere to the skin perfectly even after applying serums and moisturizers. Once the mask is completely absorbed and becomes clear it peels of the skin with ease. Based on the quality of these masks I am shocked by the low price, it is such a great value for your money. This Mask has become a staple in my skincare routine and I will continue to purchase these!!
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Reviewed in the United States on May 10, 2026
★★★★★ 4
Woke Up Glowing ✨ (But Sleeping In It Is a Stretch lol)
Scent: Collagen, Size: 4 Count (Pack of 1)
I was honestly impressed with this mask! It feels super soft, cooling, and refreshing while wearing it. The jelly texture makes it feel really hydrating and luxe, like a mini spa night at home. My skin looked smooth, plump, and GLOWING the entire next day after I took it off. Like… noticeably radiant.
I also have sensitive skin, so I was a little nervous trying it at first, but I didn’t have any irritation or reaction at all. My skin felt calm, hydrated, and refreshed afterward.
One thing I actually liked was that the mask was easy to customize a little. I have a nose piercing, so I just tore a small piece near my nose so it would fit comfortably without irritating it. The material held up perfectly, so that was a nice bonus for anyone with piercings or who just needs a better fit in certain areas.
My only complaint is the “sleep in it” part of the instructions. I personally don’t see how that’s possible 😅 The mask stays pretty moist and jelly-like the whole time, so it felt uncomfortable to lay down in and I kept feeling like it would slide around. I ended up just wearing it for a while before bed instead.
Overall though, the results were worth it and I’d definitely use it again for the glow alone!
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Miracle in a mask
Scent: Collagen, Size: 4 Count (Pack of 1), Scent: Collagen, Size: 4 Count (Pack of 1)
I'm going to start this by saying I'm *really* not used to things just.... working.... as advertised. Especially when it comes to skincare. That said, after ONE USE I saw a noticeable difference in my skin. I've had notoriously aggravating combination skin my entire life- but this mask is the FIRST time anything has effectively evened that out.
Granted, this is only 1 use, but to have such a dramatic increase in hydration, improvement in under eye puffiness and dark circles, and my skin no longer feeling tired/dull? Beyond impressed. The glow lasted about 5 days! No smell or weird textures/residues, works amazingly, and so easy to use.
Tips:
- Sleeping in this is definitely not as comfortable or easy as social media makes it out to be (esp for side/belly sleepers). So back sleeping or bust IMHO. You absolutely need to wait at least an hour after applying it before trying to sleep in it so it starts to mold to your face.
- This mask has a CRAZY cooling effect. For my ND girlies with the tism, keep that in mind and find something to occupy your mind while it calms down. By the time it's ready to come off, it feels "normal".
- Use the mouth hole piece for the space between your eyebrows and the eye hole pieces on your nasolabial folds.
- I used scissors to make tiny slits in the areas that needed to sit more flush with the contours of my face
- The material is very forgiving and allows you to place it, move it, and mold it before it starts to really stick to your face. That said, it is very thin/fragile! So if you have to fuss with it, do so very gently. Make sure all edges and corners are flush to your skin.
- Helps to tilt your head back a wee bit, place it at the center, lay it on your skin, and then smooth it from the center outwards. You'll see if you have bubbles under any areas so you can smooth those out before it starts to dry.
- I've seen some influencers say to just let the remaining product absorb into your skin after you take the mask off, but I couldn't fathom slapping primer and blush over that so I washed it off. The pic i posted is before i washed my face, about 10min after removing the mask (mind my RBF, no coffee yet lol).
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Reviewed in the United States on May 20, 2025
★★★★★ 5
Nice mask! Caviar
Scent: PDRN, Size: 4 Count (Pack of 1), Scent: PDRN, Size: 4 Count (Pack of 1)
The first 3 pictures were taken after the first hour and a half. The second 3 pictures were taken at 2 hours. The mask had a hard time dissolving underneath my eyes and around my chin area mostly but everywhere else it hardened within the first hour or so. I will try to wear it for longer than 2 hours next time. To see if that changes, but my skin feels really nice right now. It's a little sticky, but it looks healthy and has a nice glow. Application is easy. I love that its separated into 2 parts.
Doesn't fit well around the nose between the eyes and doesn't cover my entire face but its a great mask. I tried the caviar one this time. I have the collagen ones as well but these have better reviews.
They seem to work effectively, for a nice glow and self pamper session.
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Reviewed in the United States on May 5, 2026
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