If you are planning a home battery energy storage system (ESS) built around 48V LiFePO4 batteries, you still have a lot of homework to do.
Start with the basics. Is your home grid-tied or off-grid? What are your current energy needs, and what do you want to keep running during an outage?
These questions need answers before you invest in home battery backup, because they decide the voltage, capacity, and equipment you need.
This post covers the features of the ETHOS 48V LiFePO4 battery, a 48V lithium battery for home backup and off-grid systems, and the ESS that goes with it.
Key Features of the ETHOS 48 Volt Lithium Battery
The ETHOS is a 48V lithium battery system that lists 6,000+ cycles, a 12-year warranty, an IP65 / NEMA 4X rating, and expansion to 80+ kWh.
Stable LiFePO4 chemistry
LiFePO4 is a stable, long-lasting lithium chemistry.
Advanced battery management system (BMS) protection
The battery management system regulates state of charge, temperature, and more. The product page lists full protection against voltage, current, and temperature risks.
Long lifespan
The ETHOS is rated for 6,000+ cycles.
Indoor and outdoor-readiness
The ETHOS can be installed indoors or outdoors. It lists an IP65 / NEMA 4X rating.
Modular expansion capabilities
It is expandable to 80+ kWh, with up to 16 parallel connections per control box. 2x and 3x module expansion kits are available.
Integrated smart controls
The system is controlled through the ETHOS controller.
Easy, fast installation
The ETHOS is designed for a straightforward installation.
Plug-and-play modular design
The product page lists a simplified, plug-and-play modular setup, so you can add capacity without a rebuild.
No maintenance
Unlike lead-acid batteries, the ETHOS needs no routine servicing.
Compatibility and closed-loop communication
As a 48V solar battery, the ETHOS lists closed-loop communication with the EG4 18kPV, EG4 FlexBOSS18, and EG4 FlexBOSS21 for grid-tied systems. For off-grid systems, it lists closed-loop communication with all EG4 inverters and all BigBattery APEX inverters. Closed-loop means the inverter reads true state of charge from the battery rather than estimating from voltage. Communication is over CAN bus and RS485.
Slim, 6.7-Inch-Deep Design
The ETHOS is 6.7 inches deep, which helps in tight spaces.
12-Year Warranty and Lifetime US-Based Tech Support
The ETHOS lists a 12-year warranty with full battery coverage and lifetime USA-based tech support.
ETHOS 48V LiFePO4 Battery at a Glance
| Spec | As listed on the product page |
|---|---|
| Chemistry | LiFePO4 |
| Nominal voltage | 51.2V (marketed as 48V) |
| Cycle life | 6,000+ cycles |
| Warranty | 12 years, lifetime USA-based tech support |
| Enclosure | IP65 / NEMA 4X |
| Expansion | 80+ kWh, up to 16 parallel connections per control box |
| Communication | CAN bus, RS485 |
| Charging temperature | 32°F to 113°F (0°C to 45°C) |
| Discharging temperature | -4°F to 140°F (-20°C to 60°C) |
| Depth | 6.7 in |
Does Your Home Need a Battery ESS?
A system built on LiFePO4 batteries can make sense for many homes. Here is what a lithium battery ESS can offer:
- Energy independence.
- Protection from grid blackouts.
- More efficient use of stored energy, especially for grid-tied homes.
- A necessary component of any off-grid system.
- A quieter alternative to gas generators.
- Scalability, so you can add capacity as your needs grow.
- A lower carbon footprint.
- Potential energy cost savings.
- Possible participation in grid-sharing initiatives.
If you want home battery backup that you can grow over time, a modular LiFePO4 system is a practical place to start.
Still Have Questions About the ETHOS 48V LiFePO4 Batteries That We Offer?
Not sure what equipment fits your home? BigBattery’s Texas-based experts can recommend a system for your plan. See the ETHOS 48V LiFePO4 battery, size your system with the Solar Battery Sizing Calculator, or call (818) 280-3091.
Frequently Asked Questions
What is the ETHOS 48V LiFePO4 battery?
It is a modular LiFePO4 battery system for home backup and off-grid systems, controlled through the ETHOS controller. The product page lists 51.2V nominal voltage.
How many cycles does the ETHOS last, and what is the warranty?
The page lists 6,000+ cycles and a 12-year warranty with full battery coverage, plus lifetime USA-based tech support.
Can the ETHOS be installed outdoors?
Yes. The page lists an outdoor-ready design with an IP65 / NEMA 4X rating, and notes that it also works indoors.
Which inverters work with the ETHOS?
For grid-tied systems, the page lists the EG4 18kPV, FlexBOSS18, and FlexBOSS21. For off-grid systems, it lists all EG4 inverters and all BigBattery APEX inverters.
How far can the ETHOS expand?
The page lists expansion to 80+ kWh, with up to 16 parallel connections per control box.
Does the ETHOS need maintenance?
No routine servicing is needed. The page calls it maintenance-free.
