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Battery · 12,000W · 15,360Wh
Experience the future of off-grid power with BigBattery's groundbreaking 48V ETHOS systems! Designed for tiny homes, cabins, and homesteads, our 15.4kWh configuration delivers unparalleled reliability, safety, and cutting-edge features.
The ETHOS system redefines off-grid power, boasting a versatile, stackable, and modular design for effortless expansion. With all mounting hardware included, installation is a breeze. Featuring an IP65-rated casing and internal fire suppression system, along with an advanced BMS offering auto cell-balancing, the ETHOS ensures enduring safety and reliability. Monitor your power system's status and performance effortlessly through the interactive LED display and communication protocols like CANBus and RS485.
Whether you seek reliable emergency backup power or year-round uninterrupted energy, the ETHOS delivers consistent, efficient power day in, day out. Empower yourself with control over your energy. Invest in the 48V ETHOS today and embrace a future of sustainable power solutions!
To explore more solutions for reliable off-grid power and whole-home backup, visit our Big Battery for Home Backup collection and find the system that fits your energy needs.
| SKU: | K0955 |
| GTIN-12 (U.P.C.): | 850061252098 |
| System Voltage: | 48V |
| Nominal Voltage: | 51.2V |
| Chemistry: | LiFePO4 |
| kWh Capacity: | 15.36kWh |
| Ah Capacity: | 300Ah |
| 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 3P |
| Max Continuous Discharge Current: | 250A |
| Max Continuous Power: | 12,800W |
| 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: |
387 lb (175.5 kg)
|
| Depth: |
6.7 in (170 mm)
|
| Width: |
26.5 in (674 mm)
|
| Height: |
59.8 in (1520 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
|
| Output | |
| Nominal output power | 8,000 W |
| Peak power (0.5s / 1min) | 16,000W / 10,000W |
| Output voltage | 120/240V, 120/208V |
| Max output current | 33.3A @ 240V |
| Max cont. per-line wattage | 4,000 W |
| Power factor | 0.99 (full load) |
| Transfer time | 20ms default / 10ms selectable |
| Locked rotor amps | 195 A |
| Solar Input | |
| MPPT channels | 2 (2 inputs each) |
| Max utilized solar power | 12,000 W |
| Rec. max solar input | 15,000 W |
| Max usable input current | 25A/25A (41.6A total) |
| DC input voltage range | 100–600 Vdc |
| MPPT voltage range | 120–500 Vdc |
| Efficiency (PV to battery) | 99.9% |
| Battery & Grid | |
| Compatible battery types | Lead-acid, lithium |
| Nominal battery voltage | 48 Vdc |
| Battery voltage range | 40–60 Vdc |
| Max charge/discharge current | 167A @ 48V |
| Max gen/grid passthrough | 80A / 80A |
| Min. generator size | >5,000 W |
| CEC weighted efficiency | 96.4% |
| Physical & Environmental | |
| Dimensions (H×W×D) | 29.5 × 20.5 × 11.2 in |
| Weight | 110 lbs |
| Enclosure rating | NEMA 4X (all-weather) |
| Operating temperature | -13°F to 140°F |
| Noise level | <50 dB @ 3 ft |
| Design topology | High-frequency, transformerless |
| Idle consumption | <55 W standby |
| Connectivity & Warranty | |
| Communication | RS485 / Wi-Fi / CAN |
| Max parallel units | 10 |
| Brand / model | EG4 12kPV |
| Warranty | 10 years |
| Built-In Protections | |
| PV faults | Arc + ground fault |
| Wiring faults | Reverse polarity |
| Leakage & surge | Monitoring + protection |
| PV disconnect | Integrated |
3× BigBattery ETHOS 48V 5.12kWh LiFePO4 Battery Module
| Battery | |
| System voltage | 48V (51.2V nominal) |
| Chemistry | LiFePO4 |
| Capacity per module | 5.12kWh / 100Ah |
| Cell configuration | 16S per module |
| 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 (max 5 seconds) |
| Max charge current | 200A per control box |
| Cycle life | 6,000+ cycles |
| General | |
| Charge temperature | 32-113°F (0-45°C) |
| Discharge temperature | -4-140°F (-20-60°C) |
| Optimal discharge temperature | 59-95°F (15-35°C) |
| Storage (SoC >50%) | -4-113°F, max 6 months |
| Module footprint | 26.5 in W x 6.7 in D (674 x 170 mm) |
| Max connections | Up to 16 modules per control box |
| Protection rating | IP65 / NEMA 4X |
| Communications | CANBus / RS485 (closed-loop with EG4 18kPV) |
| Certifications | UL9540, UL9540A, UL1973, UN38.3 |
| Warranty | 12 years |
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.
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.
To start a return: +1 (307) 317-7213, hello@ecosolarkits.com, or live chat. Read the full return and refund policy
