EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input
Estimated Delivery Between
and .
Order within to get it by the earliest date.
Free Shipping In The USA | Call Us: 877-556-3347
Free Shipping In The USA | Call Us: 877-556-3347
Share it with us now and we will beat it. Get the best deal online, guaranteed!
and .
Order within to get it by the earliest date.
Build Your Perfect Off-Grid Rig With Our System Calculator
Visit CalculatorThe EG4 FlexBOSS18 is a powerful hybrid inverter designed to optimize solar energy conversion for both off-grid and grid-tied applications. With an impressive 13kW AC output and 18kW PV input, this inverter can handle high-demand loads with ease. Its 120V/240V split-phase capability makes it ideal for residential and commercial use, providing uninterrupted power with seamless battery integration.



Everything you need is included with your product.
| Specification | Details |
| NOMINAL GRID VOLTAGE (INPUT & OUTPUT) | 240 VAC | 208 VAC |
| FREQUENCY | 60Hz Default (50Hz Capable) |
| MAX. CONTINUOUS DISCHARGE RATE | 10kW |
| MAX. APPARENT POWER | 13kW (54A @240V) | 11.2kW (54A @208V |
| MAX. CONTINUOUS CURRENT @ 45°C | 54A |
| MAX. CONTINUOUS DISCHARGE W/ PV & GRID ONLY @ 45°C | 10kW | 13kW |
| POWER FACTOR (OUTPUT) | 0.6 – 1.0 |
| MAX. OUTPUT FAULT CURRENT | 156A peak @ 100us |
| MAX. PASSTHROUGH FROM GRID | 90A |
| THD V (VOLTAGE) | <3% @ full load |
| THD I (CURRENT) | <5% @ full load |
| BACKUP SWITCHING TIME (TRANSFER TIME) | 20ms (Default), 10ms (Configurable), 20ms (Parallel) |
| OPEN LOOP RESPONSE TIME (OLRT) | Pending |
| TIME TO STEADY STATE | Pending |
| MAX. CONTINUOUS PER-LINE WATTAGE | 6.5kW |
| Specification | Details |
| BATTERY TO GRID/LOAD | 94% |
| PV TO GRID/LOAD | 97.5% |
| PV TO BATTERY | 94.5% |
| CEC EFFICIENCY (CALIFORNIA ENERGY COMMISSION) | Pending |
| Specification | Details |
| MAX. SOLAR STC INPUT POWER | 18kW |
| MAX. PV INPUT VOLTAGE | 600 VDC |
| MPPT VOLTAGE RANGE | 120V – 440 VDC |
| MPPT FULL POWER VOLTAGE RANGE | 250V – 440 VDC |
| # OF MPPTS | # OF STRINGS PER MPPT | 2/2 |
| MAX. CURRENT PER MPPT | 26A/26A |
| MAX. SHORT-CIRCUIT CURRENT RATING PER MPPT | 31A/31A |
| NOMINAL MPPT VOLTAGE | 360 VDC |
| UNIT STARTUP VOLTAGE | 200 VDC |
| Specification | Details |
| COMPATIBLE BATTERY TECHNOLOGIES | Lithium/Lead-acid |
| OPERATING VOLTAGE | 40 – 60 VDC |
| NOMINAL VOLTAGE | 48 VDC |
| MAX. CHARGE/DISCHARGE CURRENT | 208A (10kW) |
| BATTERY COMMUNICATION PROTOCOL | CAN/RS485 |
| Specification | Details |
| OPERATING TEMPERATURE RANGE | -13°F – 140°F (-25°C – 60°C); > 45°C Derating |
| OPERATING HUMIDITY | 0 – 100% |
| MAX. ALTITUDE OF OPERATION | <2000m (<6561ft) |
| ENCLOSURE RATING | NEMA 4X |
| STORAGE TEMPERATURE RATING | -13°F – 140°F (-25°C – 60°C) |
| COOLING (OR COOLING CONCEPT) | Fans |
| Specification | Details |
| DIMENSIONS | 29.52 x 20.47 x 10.43 in. (750 x 520 x 265 mm) |
| TOTAL WEIGHT | 115 lbs. (52 kg) |
| MOUNTING OPTION(S) | Wall |
| USER INTERFACE | APP/WEB/LCD (optional) |
| SCALABILITY | 10 |
| INVERTER IDLE CONSUMPTION @ NO LOAD @ (*TEMP) | <60W (Standby) |
| NOISE | <50dB @ 3 ft |
| LOCKED ROTOR AMPS (LRA) | 195A |
Can the EG4 FlexBOSS18 be used for both off-grid and grid-tied applications?
Yes! This hybrid inverter can operate as a standalone off-grid system or integrate with the grid for enhanced energy efficiency.
What battery types are compatible with the EG4 FlexBOSS18?
It is designed to work with 48V LiFePO4 batteries, ensuring optimal performance and longevity.
How many inverters can I connect in parallel?
You can parallel multiple units to increase power output for larger energy demands.
Does it support remote monitoring?
Yes, the Wi-Fi and RS485 connectivity allow real-time monitoring and control via the EG4 app.
Shipping is FAST & FREE across the US. Read our full Shipping Policy here.
We offer market leading Easy 30 Day Returns. Read more about our Returns Policy here.
We get it. You've got a lot of choices when it comes to online retailers. Here's why we think you should shop with us at Off-Grid Source.
Trusted By 10,000+ Customers. See All Reviews.
I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!
Bruce D.
I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.
Jennene A.
I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.
Ray B.
I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!
Roger V.
I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.
Jeff S.
We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!
Jason
Very fast response times. Very professional. I highly recommend!
Ray W.
Sign up for emails and get exclusive offers, new product drops, and expert advice to help you build the right solar setup with confidence.