Skip to content
Description Specs What's In The Box Documents Reviews
EG4 48V 314Ah WallMount Indoor LiFePO4 Battery + 18kPV All-in-One Hybrid Solar Inverter
by EG4

EG4 48V 314Ah WallMount Indoor LiFePO4 Battery + 18kPV All-in-One Hybrid Solar Inverter

SKU: K0292
Save $8,445.70 Save $1,873.24
$9,366.21
$9,366.21 - $42,228.50
$9,366.21
$7,492.97
$7,492.97 - $33,782.80
$7,492.97
Availability:
in stock
Availability:
in stock
Availability:
in stock
Availability:
in stock
Availability:
in stock
Availability:
in stock
Bundle Options: 1 x 314Ah WallMount Indoor LiFePO4 Battery + 18kPV All-in-One Hybrid Solar Inverter

Free Shipping

Enjoy free shipping on all products from Off Grid Stores

Authorized Dealer

We are authorized dealers of every brand on our website

10-Year Warranty

Off Grid Stores is an authorized retailer of EG4 products. Because of this, we pass on EG4's manufacturer warranty to you.

Best Price Guarantee

We work hard to offer fair, competitive prices on everything we sell.

If you find the same item listed for less on a competitor’s site, let us know — and we’ll do our best to match it.

Just reach out to our customer service team before purchasing to see what we can do.

You can learn more by visiting our Best Price Request page here.

Shipping & Handling

We provide Free Shipping to the continental 48 United States only.

International shipping, as well as shipping to Alaska, Hawaii, US Protectorates, P.O. Boxes, APO, FPO, or DPO addresses, is NOT available.

Orders are typically processed and shipped from our warehouse within 1-3 Business Days (excluding weekends and holidays).

After leaving our warehouse, the expected delivery time is 3-4 Business Days, resulting in an average total shipping and handling time of 4-7 Business Days.

Learn more about our Shipping & Handling Policy here.

Returns & Refunds

While shopping at Off Grid Stores know that returns are a breeze! If you are not completely satisfied with your purchase, for any reason, you may return it to us within 30 Days of delivery for a refund.

If you would like to open up a return you can send us an email to support@offgridstores.com with your name, order number, and reason for return.

To learn more about our Returns & Refunds Policy you can do so here.

Why Choose Off Grid Stores?
  • Trusted by Thousands: We’ve served over 15,000 customers and counting — your satisfaction is our priority.
  • Real Expertise: Our team has hands-on experience with the products we sell — we actually use them ourselves.
  • U.S.-Based Support: When you reach out, you’ll talk to a real person here in the USA, not someone overseas.
  • Fast, Reliable Shipping: All products ship from U.S. warehouses for quicker, hassle-free delivery.
  • Authorized Dealer: We're official partners with every brand we carry, so your purchase is backed by full manufacturer warranty and support.

EG4 48V 314Ah WallMount Indoor LiFePO4 Battery + 18kPV All-in-One Hybrid Solar Inverter

EG4 48V 314Ah WallMount Indoor LiFePO4 Battery + 18kPV All-in-One Hybrid Solar Inverter

The EG4 314Ah Indoor Battery + EG4 18kPV ESS System delivers intelligent energy management, dependable backup power, and scalable energy independence for grid-tied, grid-assist, and off-grid applications. Combining the high-capacity 16.0kWh EG4 WallMount Indoor LiFePO₄ battery with the versatile EG4 18kPV all-in-one hybrid inverter, this system offers a powerful solution for reducing energy costs, protecting against outages, and maximizing solar production.

The EG4 18kPV provides up to 12,000W of continuous split-phase output and utilizes up to 18,000W of solar power through three high-voltage MPPTs. Its 100–600VDC solar input range supports efficient array design, reduced cable requirements, and streamlined installation. The inverter can operate on-grid, off-grid, or in grid-assist mode and supports exporting excess solar energy where permitted by the local utility.

Paired with the 314Ah battery—featuring 16.0kWh of storage, 200A continuous output, 10,000 cycles at 80% depth of discharge, and an advanced third-generation BMS—the system provides stable, long-lasting performance for homes and small businesses.

Closed-loop battery communication allows the inverter and battery to coordinate charging, discharging, monitoring, and system protection. Built-in Wi-Fi provides remote access through the EG4 monitoring platform, while the inverter’s configurable LCD interface allows convenient on-site control.

Designed for safe indoor energy storage, the battery includes automatic self-heating for cold environments, Auto-ID technology for simplified expansion, natural-convection cooling, and flexible wall- or floor-mount installation. The inverter features a NEMA 4X outdoor-rated enclosure, integrated PV disconnect, arc-fault protection, ground-fault protection, and rapid-shutdown support.

Compatibility

Integrated & Optimized System:

  • EG4 WallMount 314Ah Indoor Battery + EG4 18kPV All-in-One Hybrid Inverter
  • Closed-loop communication between compatible EG4 components
  • 48V nominal battery architecture

Expandable & Flexible:

  • Cross-compatible with other supported EG4 48V battery systems
  • Scalable battery storage for growing energy needs
  • Supports grid-tied, grid-assist, and off-grid installations
  • Supports AC coupling and generator integration
  • Up to 10 inverters can be paralleled for expanded system capacity

Key Features

  • Complete Hybrid ESS Solution – Integrated battery and inverter system for solar production, backup power, and energy management
  • 12,000W Continuous Output – Split-phase 120/240V or 120/208V power for residential and light-commercial applications
  • 18,000W Usable PV Input – High solar capacity for improved daytime production and battery charging
  • Three High-Voltage MPPTs – Flexible array configuration with a 100–600VDC input range
  • 16.0kWh LiFePO₄ Battery (314Ah) – High-capacity, safe indoor energy storage
  • 200A Continuous Battery Output – Supports demanding household and backup loads
  • 10,000-Cycle Battery Life – Long-lasting performance at 80% depth of discharge
  • Third-Generation BMS – Advanced monitoring, cell balancing, and system protection
  • Closed-Loop Communication – Coordinated charging, discharging, and battery monitoring
  • Grid Sell-Back Capability – Export excess solar power where permitted by utility regulations
  • Built-In Wi-Fi Monitoring – Remote performance monitoring and system management through EG4 Connect
  • Fast Backup Switching – Helps maintain power to connected loads during grid outages
  • EMP-Hardened Inverter – Engineered for added resilience against electrical disturbances
  • NEMA 4X Inverter Enclosure – Suitable for indoor or outdoor inverter installation
  • Self-Heating Battery – Supports reliable battery performance in colder indoor environments
  • Expandable Design – Parallel up to 10 inverters and add compatible EG4 batteries as energy needs grow
  • Maintenance-Free Operation – Quiet, efficient operation without routine servicing

A powerful, grid-interactive energy storage system engineered for solar savings, whole-home backup, flexible system expansion, and long-term energy independence.

Specifications:

EG4 48V 314Ah WallMount Indoor Battery
Product Type Low Voltage LFP Battery
Battery Type Lithium Iron Phosphate (LFP)
Model Number WM-48-314-IN-XX (XX is a number between 00 – 99)
Nominal Energy Capacity 16kWh
Usable Energy (DOD%) 12.86kWh (80% recommended)
Voltage Range 47.5 – 57.6 VDC
Nominal Voltage 51.2 VDC
Capacity 314Ah
Charging Voltage Range 56 – 57 VDC
Discharging Cut-off Voltage 47.5 VDC
Max Continuous Charge Current 157A
Max Continuous Discharge Current 200A
Continuous Charge/Discharge Power 8/10.2 kW
Recommended Charging/Discharging Rate 0.5C
Peak Power 12.8kW (3 sec)
Round-trip Efficiency 95%
Max Parallel Units 16
Protection Features Over/Under Voltage, Over-Current, Short Circuit, High/Low Temp
Battery Management System (BMS) Integrated, Active Balancing
Communication Protocols RS485, CAN
Battery Breaker 250A
Storage Temperature Range** -4 – 131°F
Humidity Range 5% – 95% RH (non-condensing)
Altitude 9843 ft. (<3000 m)
Cooling Method Natural Convection
Dimensions (H × W × D) 34.1 in. × 18.1 in. × 9.6 in.
Operating Temperature Range Charge: 32 – 122°F ; Discharging: -4 – 131°F
Recommended DOD Setting Note* EG4 recommends this value be set no lower than
20% to maintain the recommended 80% Depth of Discharge.
Storage Temperature Note** Less than 3 months of storage. If longer than 3 months,
recommended storage temperature will be 59°F – 86°F
Weight 293.2 lbs.
Enclosure Rating IP20
Mounting Options Wall/Floor mount
Display/Indicators LED Status
Connector Type Degson quick connector/screw terminal
UL 1973 Yes
UL 9540A Batt to Batt spacing of 6 in.
UN 38.3 Yes
FCC Part 15 (EMC) Yes
Protection Class Class B
Cycle Life (70% EOL Capacity) 10000 cycles @ 0.5C, 25°C, 80% DOD
Design Life* 10 years
Application Type Residential/Commercial/Off-grid/Backup
Lifetime Energy Throughput (Calculated) (51.2V×314Ah/1000×80%×10000/1000)90% = 115.7 MWh
or (12861 kWh×10000 cycles×90% efficiency) = 115.7 MWh
Note Information subject to change without notice.
EG4 18kPV 12000W 48V Split Phase Hybrid Inverter
AC INPUT
C Voltage 120V AC / 240V AC
AC Frequency 50 Hz / 60 Hz
Max. Continuous AC Current 50A @ 240V AC
Max. AC Input Power 12000W
Max. AC Bypass 200A
AC GRID OUTPUT
Operating Voltage Range 180 - 270V AC
Output Voltage 120V AC / 240V AC
Max. Continuous Output Current 50A
Output Frequency 50 Hz / 60 Hz
Output Power 12000W
Surge Capacity (with PV) 14700W (10 min) / 15500W (5 min)
Surge Capacity (without PV) 13500W (10 min)
Max. Continuous Line Wattage 6000W
Power Factor 0.99 (Full Load)
Reactive Power Adjustment Range -0.8 ~ 0.8 Leading Adjustable
Total Harmonic Distortion <5% (Full Load)
Transfer Time 10 - 20 ms (Single) / 20 ms (Parallel)
AC BACKUP / UPS OUTPUT
Max. Continuous Output Current 50A
AC Bypass (Generator) 90A
Output Voltage 120V AC / 240V AC
Output Power 12000W
Max. Continuous Line Wattage 8000W (per 120V)
Operating Voltage Range 180 - 270V AC
Output Frequency 50 Hz / 60 Hz
Max. Output Power (with PV) 14700W (10 min) / 15500W (5 min)
Max. Output Power (without PV) 13500W (10 min)
Total Harmonic Distortion Voltage <5%
Switching Time 10 ms
PV INPUT
No. of MPPTs: 3
Inputs per MPPT: 2 (MPPT 1) / 1 (MPPT 2 & 3)
Max. Input Current: 25A (MPPT 1) / 15A (MPPT 2 & 3)
Max. Short Circuit Input Current 31A (MPPT 1) / 19A (MPPT 2 & 3)
DC Input Voltage Range 100 - 600V DC
Start Up Voltage 100V DC
MPPT Operating Voltage Range 140 - 500V DC
MPPT Voltage 360V DC
Max. PV Array Power 18000W
Max. Efficiency 94 - 99.9%
BATTERY
Nominal Voltage 48V DC
Voltage Range 40 - 60V DC
Max. Charge / Discharge Current 250A
Recc. Battery Capacity per Inverter >200 Ah
OPERATING ENVIRONMENT
Operating / Storage Temperature Range -13ºF - 140ºF
Altitude <6,561 ft (2000 m)
Relative Humidity 0 - 100%
Typical Noise Emission 68 dB @ 3 ft
Protection Rating IP65 / NEMA 4X
Communications RS485 / CANBus / WiFi
Max. Parallel Connections 10
DIMENSIONS
Weight 121 lbs
Depth 11.2 in
Width 20.5 in
Height 34.3 in

PACKAGE INCLUDES

EG4 48V 314Ah WallMount Indoor LiFePO4 Battery + 18kPV All-in-One Hybrid Solar Inverter

EG4 48V 314Ah WallMount Indoor Battery

x 1

EG4 Indoor Buildable Conduit Box

x 1

EG4 18kPV 12000W 48V Split Phase Hybrid Inverter

x 1

Product Documents:

EG4 314Ah Indoor WallMount Battery User Manual

download
Download Now >

EG4 48V 314Ah WallMount Indoor Battery Specification Sheet

download
Download Now >

EG4 314Ah Indoor WallMount Battery Quick Start Guide

download
Download Now >

EG4 48V 314Ah WallMount Indoor Battery Certification Of Compliance

download
Download Now >

EG4 18kPV 12000W 48V Split Phase Hybrid Inverter User Manual

download
Download Now >

EG4 18kPV 12000W 48V Split Phase Hybrid Inverter Specification Sheet

download
Download Now >
OTP graphic
OTP graphic