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EG4 24kW Output Power System | 48V 30.7kWh ETHOS Battery Backup | BigBattery

SKU: K0959
Availability: In stock
$16,094.98
$16,094.98
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  • Off-Grid
  • Home Backup
  • Whole House
  • Commercial
10-year manufacturer warranty Backed by BigBattery. Full coverage details in the Description tab.

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ETHOS + EG4 18kPV ESS · 2× Inverter / 6× 5.12kWh Battery Modules

BigBattery ETHOS + EG4 18kPV Hybrid Inverter ESS - 30.72kWh / 24kW System

A complete, high-performance energy storage system pairing six ETHOS 48V 5.12kWh lithium battery modules with two EG4 18kPV hybrid inverters - delivering 30.72kWh of storage and 24,000W of continuous AC output in one integrated, UL 9540-certified package.

30.72 kWhTotal Storage (6× 5.12kWh ETHOS)
24,000 WContinuous Output (2× 18kPV)
36,000 WMax Combined PV Input
UL 9540Certified System
BigBattery ETHOS 30.72kWh battery system with EG4 18kPV inverters outside a modern home at dusk - 12-year battery warranty, UL-certified
Overview

All-in-One Home & Grid-Tied Energy Storage

Combining the scalable ETHOS 48V lithium battery system with two EG4 18kPV hybrid inverters, this system delivers reliable, efficient, and intelligent energy management for both on-grid and off-grid applications. Expandable well beyond this configuration, the ETHOS battery adapts to growing energy needs while the 18kPV inverters seamlessly manage power from solar, battery storage, and the grid.

Designed with UL 9540-certified configurations, advanced battery management, and U.S.-engineered components, this system ensures safe, maintenance-free performance with seamless closed-loop communication between battery and inverter.

Ships From: Texas, USA | Warranty: 12 Years (Battery), 10 Years (Inverter) | Support: Lifetime USA-Based Tech Support

This configuration pairs 2× EG4 18kPV inverters with 6× ETHOS 5.12kWh battery modules. Totals - 30.72kWh storage, 24,000W continuous AC output, 36,000W max combined PV input - are calculated from BigBattery's per-unit specs.

Compatibility

System Compatibility

Integrated & Optimized System (UL 9540 Certified + Closed-Loop Communication)

  • ETHOS Battery System + EG4 18kPV Hybrid Inverter

Expandable & Flexible

  • Scalable ETHOS battery capacity well beyond this configuration
  • Compatible with additional ETHOS modules for future expansion
BigBattery ETHOS indoor, outdoor and commercial battery configurations with UL certification and installer-friendly features
Key Features

Key Features

  • All-in-One ESS Solution – Battery + inverter system designed to work seamlessly together
  • 18kPV Hybrid Inverter Power – Supports solar, battery, and grid simultaneously
  • LiFePO4 Battery Chemistry – Safe, stable lithium technology with long lifespan
  • 6,000+ Cycle Life – Built for years of daily use and long-term savings
  • Advanced BMS Protection – Full protection against voltage, current, and temperature risks
  • Closed-Loop Communication – Optimized performance and real-time coordination between battery and inverter
  • Modular Expansion – Easily increase storage capacity as energy needs grow
  • Fast Installation – Streamlined setup with integrated system design
  • Maintenance-Free Operation – No routine servicing required
Data

Specifications (Per Unit)

ETHOS Battery (Each 5.12kWh Module, 6 Included)

System voltage 48V
Nominal voltage 51.2V
Chemistry LiFePO4
kWh capacity 5.12 kWh
Ah capacity 100 Ah
Cell configuration 16S
Charging voltage range 55.6–57V
Max charge voltage 57V
Operating voltage range 48–57V
Suggested low-voltage cutoff 48–50.8V
BMS cutoff range 42–47V
Max continuous discharge current 100A per module (200A per control box)
Max discharge peak current 300A (5s max)
Max charge current 200A per control box
Charge temperature range 32°F–113°F (0°C–45°C)
Discharge temperature range -4°F–140°F (-20°C–60°C)
Module footprint 26.5 in W × 6.7 in D (674 × 170 mm)
Max parallel connections Up to 16 per control box
Protection rating IP65 / NEMA 4X
Certifications UL9540, UL9540A, UL1973, UN38.3

EG4 18kPV Inverter (Each Unit)

AC voltage 120V / 240V AC
AC frequency 50 / 60 Hz
Max continuous AC current 50A @ 240V AC
Max AC input power 12,000W
Output power 12,000W
Max AC bypass 200A
Surge capacity (with PV) 14,700W (10min) / 15,500W (5min)
Power factor 0.99 (full load)
Total harmonic distortion < 5% (full load)
Transfer time 10–20ms (single) / 20ms (parallel)
Number of MPPTs 3
DC input voltage range 100–600V DC
MPPT operating voltage range 140–500V DC
Max PV array power 18,000W
Max efficiency 94–99.9%
Battery voltage range 40–60V DC
Max charge/discharge current 250A
Operating/storage temp. -13°F–140°F (-25°C–60°C)
Protection rating IP65 / NEMA 4X
Communications RS485 / CANBus / WiFi
Weight 121 lbs (55 kg)
Dimensions (D×W×H) 11.2 × 20.5 × 34.3 in
Additional Documentation

Documents & Downloads

Battery Downloads (ETHOS)

ETHOS Spec Sheet ETHOS ESS User Manual UL9540A Certificate UL1973 Certificate UN38.3 Certificate Safety Data Sheet

Inverter Downloads (EG4 18kPV)

EG4 18kPV Spec Sheet EG4 18kPV User Manual UL 1741 Certificate UL 1741 CRD PCS Test Verification Rapid Shutdown Wiring Guide

ETHOS batteries backed by a 12-year warranty; EG4 18kPV inverters backed by a 10-year warranty. This system qualifies for the 30% Federal Solar Tax Credit.

Shipping information

Free shipping on all orders within the mainland US (Hawaii, Alaska and overseas territories excluded - a freight forwarder is required). Orders ship directly from our brand partners' warehouses across the U.S. Order confirmation is emailed immediately; if an item is unexpectedly backordered we notify you before your card is charged. In-stock items are processed within 1-4 business days (cut-off 4:00 PM EST), transit is 3-6 business days, and tracking is emailed within 24 hours of shipment. Typical delivery is 4-10 business days from purchase. Minimum order value is $69.

  • Carriers: FedEx, UPS, USPS, Estes, Roadrunner.
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  • Orders lost due to an incorrect address entered at checkout cannot be refunded.
  • Questions: +1 (307) 317-7213 or hello@ecosolarkits.com, Mon-Sat 9:00 AM - 8:00 PM EST.

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Return and refund policy

You have 30 days from the delivery date to initiate a return (35 days for orders placed Nov 25-30 and Dec 25-31). Items must be unused, in original packaging with tags attached, and returns require prior authorization from our team.

  • Damaged on arrival or wrong item: contact us within 24 hours of delivery (photos help) - we cover return shipping and issue a full refund or replacement.
  • Manufacturing defects: covered under the manufacturer's warranty - contact us for guidance.
  • Changed your mind: return shipping is the customer's responsibility and a 25% restocking fee may apply.
  • Cancelling before shipment: a 3% deduction covers platform fees.
  • Refunds are processed to the original payment method within approximately 10 days of the return being received and inspected.

To start a return: +1 (307) 317-7213, hello@ecosolarkits.com, or live chat. Read the full return and refund policy