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BigBattery ETHOS Battery & 18kPV Hybrid Inverter (ESS) | 10.24–46.1kWh | UL9540 | Grid-Tied Home Solar System (18kW PV)
BigBattery ETHOS Battery & 18kPV Hybrid Inverter (ESS) | 10.24–46.1kWh | UL9540 | Grid-Tied Home Solar System (18kW PV) - Image 2
BigBattery ETHOS Battery & 18kPV Hybrid Inverter (ESS) | 10.24–46.1kWh | UL9540 | Grid-Tied Home Solar System (18kW PV) - Image 3
BigBattery ETHOS Battery & 18kPV Hybrid Inverter (ESS) | 10.24–46.1kWh | UL9540 | Grid-Tied Home Solar System (18kW PV) - Image 4

Product Summary:

BigBattery’s UL-Grid-Tied ETHOS ESS Kits are designed to deliver reliable, long-lasting home energy storage at the lowest cost-per-kWh in the USA. Each kit combines our ETHOS lithium battery system with high-performance inverters for seamless grid integration, giving you dependable backup power, reduced energy costs, and the confidence of a 12-Year Warranty. With flexible design these ETHOS Kits make it easy to upgrade your home with safe, scalable, and efficient energy storage.

BigBattery ETHOS Battery & 18kPV Hybrid Inverter (ESS) | 10.24–46.1kWh | UL9540 | Grid-Tied Home Solar System (18kW PV)

$7,975.00
SKU# K0954

Battery Selected

2× 48V ETHOS

Total Capacity

10.24 kWh

Inverter Selected

1× EG4 18kPV

Input / Output

18 kW / 12 kW

Choose Your Inverter Option*

EG4 18kPV EG4 FlexBoss18 EG4 FlexBoss21 None

Choose Your Battery Option*

BigBattery ETHOS EG4 280Ah All Weather EG4 280Ah Indoor None

Choose Your Inverter Option*

EG4 6000XP EG4 12000XP VICTRON MP II 3000 VICTRON MP II 5000 None

Choose Your Battery Option*

BigBattery NEXUS BigBattery ETHOS BigBattery HUSKY2 INV EG4 280Ah All Weather EG4 280Ah Indoor None

Choose Your ESS Configuration*

1x Inverter

Standard

2x Inverter

Large

3x Inverter

3 Phase

SKU: K0954-V Category:
30% Federal Tax Credit AvailableThis system qualifies for federal rebates.
Learn More Here

Compatible Accessories & Additional Add-ons

ETHOS- Home Battery Backup
ETHOS- Lithium battery storage
ETHOS- Lithium battery
ETHOS- Battery for home
ETHOS- Home Battery Backup
ETHOS- Lithium battery storage
ETHOS- Lithium battery
ETHOS- Home Battery Backup

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Battery Downloads

SKU#:K0954, K0955, K0956, K0957, K0753, K0754, K0959, K0960, K0755, K0961, K0966, K0967, K0968
Spec Sheet:DownloadDOWNLOAD
User Manual:DownloadDOWNLOAD
UL9540 Certificate – BigBattery ETHOS + EG4 18kPv:DownloadDOWNLOAD
UL9540A Certificate:DownloadDOWNLOAD
UL1973 Certificate:DownloadDOWNLOAD
UN38.3 Certificate:DownloadDOWNLOAD
Safety Data Sheet:DownloadDOWNLOAD
CEC Listing – BigBattery ETHOS + EG4 18kPv:Go to linkGO TO LINK

Battery Specifications

GTIN-12 (U.P.C.):850061252005
System Voltage:48V
Nominal Voltage:51.2V
Chemistry:LiFePO4
kWh Capacity:10.24kWh
Ah Capacity:200Ah
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
Cell Configuration:16S 2P
Max Continuous Discharge Current:200A
Max Continuous Power:10240W
Max Discharge Peak Current:300A (Max 5 seconds)
Max Charge Current:200A
Charge Temperature Range:32°F – 113°F (0°C – 45°C)
Discharge Temperature Range:-4°F – 140°F (-20°C – 60°C)
Optimal Discharge Temperature Range:59°F – 95°F (15°C – 35°C)
Storage Temperature Range (SoC >50%):-4°F – 113°F (-20°C – 45°C)(Max 6 months)
Weight:273 lb (123.8 kg)
Depth:6.7 in (170 mm)
Width:26.5 in (674 mm)
Height:43.3 in (1100 mm)
Max Connections:Up to (16) parallel connections per control box
Protection Rating:IP65 / NEMA 4X
Communications:CANBus / RS485
Certifications:UL9540, UL9540A, UL1973, & UN38.3

Inverter Downloads

SKU#:INV024
Spec Sheet:DownloadDOWNLOAD
User Manual:DownloadDOWNLOAD
UL9540 Certificate – BigBattery ETHOS + EG4 18kPv:DownloadDOWNLOAD
UL1741 Certificate:DownloadDOWNLOAD
UL 1741 CRD PCS Test Verification Of Conformity Security:DownloadDOWNLOAD
Rapid Shut Down Wiring Guide:DownloadDOWNLOAD
Whitepapers, Firmware, & Wiring Diagrams:Go to linkGO TO LINK
CEC Listing – BigBattery ETHOS + EG4 18kPv:Go to linkGO TO LINK

Inverter Specifications

AC Voltage:120V AC / 240V AC
AC Frequency:50 Hz / 60 Hz
Nominal Voltage:51.2V
Max. Continuous AC Current:50A @ 240V AC
Max. AC Input Power:12000W
Max. AC Bypass:200A
Operating Voltage Range:180 – 270V AC
Output Voltage:120V AC / 240V AC
Max. Continuous Output Current:50A
Output Power:12000W
BMS Cutoff Range:42 – 47V
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)
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
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%
Idle Consumption:~70W (Normal) / ~18W (Standby Mode)
Nominal Voltage:48V DC
Voltage Range:40 – 60V DC
Max. Charge / Discharge Current:250A
Recc. Battery Capacity per Inverter:>200 Ah
Operating / Storage Temperature Range:-13ºF – 140ºF (-25ºC – 60ºC)
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
Weight:121 lbs (55 kg)
Depth:11.2 in (285 mm)
Width:20.5 in (520 mm)
Height:34.3 in (871 mm)

BigBattery batteries are backed by a 12-year warranty, giving you reliable long-term performance and confidence in every charge. Designed for durability and engineered to last, our batteries are built to power your setup for over a decade. For more information, please visit our policy page

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