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BigBattery ETHOS + EG4 FLEXBOSS18 ESS

BRAND:

| SKU:

K0230

$6,055.00
Free shipping with delivery between Jun 01 - Jun 08
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Specifications

Parameter Details
Battery Specifications
GTIN-12 (U.P.C.)850061252005
System Voltage48V
Nominal Voltage51.2V
ChemistryLiFePO4
kWh Capacity10.24kWh
Ah Capacity200Ah
Charging Voltage Range55.6 – 57V
Max Charge Voltage57V
Operating Voltage Range48 – 57V
Suggested Low Voltage Cutoff48 – 50.8V
BMS Cutoff Range42 – 47V
Cell Configuration16S 2P
Max Continuous Discharge Current200A
Max Continuous Power10,240W
Max Discharge Peak Current300A (Max 5 seconds)
Max Charge Current200A
Battery Temperature & Operating Conditions
Charge Temperature Range32°F – 113°F (0°C – 45°C)
Discharge Temperature Range-4°F – 140°F (-20°C – 60°C)
Optimal Discharge Temperature Range59°F – 95°F (15°C – 35°C)
Storage Temperature Range (SoC >50%)-4°F – 113°F (-20°C – 45°C) (Max 6 months)
Battery Physical & Installation Specifications
Weight273 lb (123.8 kg)
Depth6.7 in (170 mm)
Width26.5 in (674 mm)
Height43.3 in (1100 mm)
Max ConnectionsUp to 16 parallel connections per control box
Protection RatingIP65 / NEMA 4X
Battery Communications & Certifications
CommunicationsCANBus / RS485
CertificationsUL9540, UL9540A, UL1973, & UN38.3
Inverter Specifications
Nominal AC Voltage120/240VAC | 120/208VAC (L1/L2/N required)
Frequency60 Hz (Default) | 50 Hz
Max. AC Current54A @ 240V | 54A @ 208V
Max. AC Input Power13000W
Max. AC Bypass90A
Operating Voltage Range180 – 270VAC
Output Voltage120/240VAC | 120/208VAC (L1/L2/N required)
Max. Output Current66.7A
Nominal Output Power (without PV)12000W @ 240V | 12000W @ 208V
Nominal Output Power (with PV)16000W @ 240V | 13800kW @ 208V
Power Factor0.99 (Full Load)
Reactive Power Adjustment Range-0.8 – 0.8 Leading Adjustable
Total Harmonic Distortion<5% (Full Load)
Transfer Time20ms (Default) | 10ms (Configurable) | 20ms (Parallel)
Rated Output Current50A @ 240V | 57.7A @ 208V
Rated Output Power12000W @ 240VAC | 12000W @ 208VAC
Peak Power20000W (0.5 sec) | 15000W (1 sec)
12500W (6 min) | 11000W (12 min)
Operating Frequency60 Hz (Default) | 50 Hz
Total Harmonic Distortion Voltage<5%
Solar MPPT Specifications
No. of MPPTs2
Inputs per MPPT2 (MPPT 1) | 2 (MPPT 2)
Max. Usable Input Current26A (MPPT 1) | 26A (MPPT 2)
Max. Short Circuit Input Current31A (MPPT 1) | 31A (MPPT 2)
DC Input Voltage Range100 – 600VDC
Unit Start-Up Voltage200VDC
MPPT Operating Voltage Range120 – 440VDC
Nominal MPPT Voltage360VDC
Max. Utilized PV Array Power18,000W
Max. Recommended PV Input18,000W
Performance & Efficiency
Max. Efficiency97.5% (PV to Grid) | 94.5% (PV to Battery) | 94% (Battery to Grid)
Idle Consumption<65W
Recommended Battery Capacity per Inverter>300Ah
Environmental Specifications
Operating / Storage Temperature Range-13ºF – 140ºF (-25ºC – 60ºC)
Operating Altitude<6,561 ft (2000 m)
Relative Humidity0 – 100%
Typical Noise Emission<50dB @ 3 ft
Design TopologyHigh-Frequency / Transformerless
Protection RatingIP65 / NEMA 4X
Communications & Expansion
CommunicationsRS485 / CANBus / WiFi / 4G
Max. Parallel Connections16
Physical Specifications
Weight115 lbs (52 kg)
Depth11.2 in (287 mm)
Width22.8 in (567 mm)
Height30.5 in (775 mm)

Understanding Your Power Needs

Power Calculation Guide

Sizing Metric Formula & Example
Energy Consumption (Wh) Formula: Watts × Hours
Example: 60W × 4 hrs = 240 Wh
Battery Capacity (Ah) Formula: Watt-hours ÷ System Voltage (V)
Example: 240 Wh ÷ 12V = 20 Ah
Inverter Size (W) Formula: Total Watts × 1.25 (safety margin)
Example: 300W × 1.25 = 375W → Use 400W inverter
Total Load Power (W) Formula: Sum of all appliance watts used simultaneously
Example: Light (10W) + Fan (75W) = 85W
Runtime (hrs) of Battery Formula: (Battery Ah × Voltage) ÷ Total Load (W)
Example: (100Ah × 12V) ÷ 240W = 5 hrs

Find Your Power Match

Need / Application System Recommendation
Basic lighting + phone charging Recommended Battery: 50Ah – 100Ah (12V)
Inverter Size: 100W – 200W
Notes: For small backup setups
Home office (laptop, fan, TV) Recommended Battery: 150Ah – 200Ah (12V or 24V)
Inverter Size: 500W – 1000W
Notes: For moderate usage with 4–6 hours of backup
Home backup (fridge, lights) Recommended Battery: 200Ah+ (24V or 48V recommended)
Inverter Size: 1000W – 1500W
Notes: Ideal for longer backups or heavier loads
Business / shop power backup Recommended Battery: 300Ah+ (48V system)
Inverter Size: 2000W – 3000W
Notes: Suitable for commercial setups or extended power outages

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BigBattery ETHOS + EG4 FLEXBOSS18 ESS

$6,055.00