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Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!

Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!

Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!
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EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input

EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input

SKU EG4FLEXBOSS18
Save $673.21
$4,488.08
$3,814.87

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EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input

The 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.


Revolutionary Power Performance

  • 16kW continuous output with solar input - 23% more power than previous models
  • 22kW maximum PV input across enhanced triple MPPTs for maximum solar harvest
  • 14kW battery-only power output providing robust backup for essential loads

Intelligent Energy Ecosystem

  • Dynamic operating modes: grid-tied, off-grid, and smart hybrid configurations
  • Advanced AI-powered load management with predictive efficiency algorithms
  • Seamless integration with the new EG4 GridBOSS PRO for complete energy ecosystem control

Industry-Leading Safety & Compliance

  • UL1741 SB certified for grid operation including advanced grid support functions
  • Integrated Smart RSD+ exceeds NEC 690.12 requirements with module-level monitoring
  • Comprehensive protection suite with self-diagnostic capabilities and remote troubleshooting
 Placeholder Image


Superior Efficiency & Economics

  • 800VDC PV input capacity reduces balance of system costs and line losses
  • Triple MPPT technology with shade mitigation maximizes production in all conditions
  • Battery-to-grid efficiency of 96.5 percent and solar-to-grid efficiency of 98.2 percent

Simplified Installation & Enhanced Monitoring

  • Toolless mounting system with quick-connect terminals reduces installation time by 40%
  • Integrated 5G/Wi-Fi/Ethernet connectivity with local backup of monitoring data
  • 120A grid bypass with zero-transfer time for critical loads
 Placeholder Image Placeholder Image

What's Included

Everything you need is included with your product.
  • EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input
  • User Manual

EG4 FlexBOSS18 13kW AC Hybrid Inverter Specifications

AC OUTPUT/INPUT
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

EFFICIENCY
Specification Details
BATTERY TO GRID/LOAD 94%
PV TO GRID/LOAD 97.5%
PV TO BATTERY 94.5%
CEC EFFICIENCY (CALIFORNIA ENERGY COMMISSION) Pending

SOLAR TECHNICAL SPECS
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

BATTERY TECHNICAL SPECS
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

ENVIRONMENTAL
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

GENERAL SPECIFICATIONS
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

Frequently-Asked Questions

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.

Manual

Shipping is FREE on all orders to customers within the 48 Contiguous States and the District of Columbia. We do not ship to Alaska, Hawaii, or any outlying islands and territories.

Processing time for orders is 1 business day

Shipping time for orders is 4-5 business days


Want to know more about our Returns Policy? Read more here.

Want to know more about our Shipping Policy? Read more here.

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at Krato Power.

  • Family Owned & Operated. Ask for Alex (Owner) at any time!
  • 4-5 Day Free Shipping with free liftgate service to the 48 Contiguous States and the District of Columbia. No extra charges. Ever
  • NO Sales Tax except for IN
  • Secured Purchase. All Customer data is secured with SSL Encryption
  • 30 Day Easy Returns. Not happy with your product, we'll take it back no questions asked.
  • Exceptional Customer Service. Check out our About Us page.
  • Call or Text Us - We are really here! (In the USA). 1-888-855-7286
Based on 12 reviews
75%
(9)
17%
(2)
8%
(1)
0%
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(0)
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Thank you for a great product.

B
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Found a better price? We will BEAT it!

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Description

EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input

The 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.


Revolutionary Power Performance

  • 16kW continuous output with solar input - 23% more power than previous models
  • 22kW maximum PV input across enhanced triple MPPTs for maximum solar harvest
  • 14kW battery-only power output providing robust backup for essential loads

Intelligent Energy Ecosystem

  • Dynamic operating modes: grid-tied, off-grid, and smart hybrid configurations
  • Advanced AI-powered load management with predictive efficiency algorithms
  • Seamless integration with the new EG4 GridBOSS PRO for complete energy ecosystem control

Industry-Leading Safety & Compliance

  • UL1741 SB certified for grid operation including advanced grid support functions
  • Integrated Smart RSD+ exceeds NEC 690.12 requirements with module-level monitoring
  • Comprehensive protection suite with self-diagnostic capabilities and remote troubleshooting
 Placeholder Image


Superior Efficiency & Economics

  • 800VDC PV input capacity reduces balance of system costs and line losses
  • Triple MPPT technology with shade mitigation maximizes production in all conditions
  • Battery-to-grid efficiency of 96.5 percent and solar-to-grid efficiency of 98.2 percent

Simplified Installation & Enhanced Monitoring

  • Toolless mounting system with quick-connect terminals reduces installation time by 40%
  • Integrated 5G/Wi-Fi/Ethernet connectivity with local backup of monitoring data
  • 120A grid bypass with zero-transfer time for critical loads
 Placeholder Image Placeholder Image

What's Included

Everything you need is included with your product.
  • EG4 FlexBOSS18 13kW AC Hybrid Inverter | 48V Split Phase | 18kW PV Input
  • User Manual

EG4 FlexBOSS18 13kW AC Hybrid Inverter Specifications

AC OUTPUT/INPUT
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

EFFICIENCY
Specification Details
BATTERY TO GRID/LOAD 94%
PV TO GRID/LOAD 97.5%
PV TO BATTERY 94.5%
CEC EFFICIENCY (CALIFORNIA ENERGY COMMISSION) Pending

SOLAR TECHNICAL SPECS
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

BATTERY TECHNICAL SPECS
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

ENVIRONMENTAL
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

GENERAL SPECIFICATIONS
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

Frequently-Asked Questions

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.

Manual

Shipping is FREE on all orders to customers within the 48 Contiguous States and the District of Columbia. We do not ship to Alaska, Hawaii, or any outlying islands and territories.

Processing time for orders is 1 business day

Shipping time for orders is 4-5 business days


Want to know more about our Returns Policy? Read more here.

Want to know more about our Shipping Policy? Read more here.

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at Krato Power.

  • Family Owned & Operated. Ask for Alex (Owner) at any time!
  • 4-5 Day Free Shipping with free liftgate service to the 48 Contiguous States and the District of Columbia. No extra charges. Ever
  • NO Sales Tax except for IN
  • Secured Purchase. All Customer data is secured with SSL Encryption
  • 30 Day Easy Returns. Not happy with your product, we'll take it back no questions asked.
  • Exceptional Customer Service. Check out our About Us page.
  • Call or Text Us - We are really here! (In the USA). 1-888-855-7286