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!
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!
EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input
- Regular price
- $3,499.00
- Sale price
- $3,499.00
- Regular price
-
$4,999.00
No obligation — get a custom quote in minutes
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EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input
Testimonials
50,000+ Happy Customers
Join thousands of happy customers who made the switch to solar.
"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
"The whole process was seamless. From ordering to installation, everything was straightforward. Our electricity bill has dropped significantly!"
"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
"We compared prices everywhere and this was by far the best deal. The quality of the panels is top-notch and installation guidance was superb."
"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
"The whole process was seamless. From ordering to installation, everything was straightforward. Our electricity bill has dropped significantly!"
"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
"We compared prices everywhere and this was by far the best deal. The quality of the panels is top-notch and installation guidance was superb."
"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
Support
Frequently Asked Questions
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Contact SupportYes. Our team can help you choose the right solar kit based on your goals, power needs, and location. We provide personalized guidance before and after your purchase at no additional cost.
Most products ship directly to your door using the most cost effective ground shipping services depending on size. You’ll receive tracking details and delivery coordination as soon as your order ships.
Many of our customers complete the majority of installation themselves using our diagrams and support resources. For final electrical connections, a licensed electrician may be required depending on local codes.
While we do not directly install systems, we can help connect you with qualified local professionals and provide technical documentation to support your installer.
We stand behind our products. If you have specific questions about returns, eligibility, or specific product conditions, you can learn more in our help center linked below.
All components are backed by manufacturer warranties. In addition, our team provides free lifetime technical support to assist you throughout the life of your system.
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