Off-Grid Systems
No Limits.
No Compromises.
The life you dreamed of doesn't run on someone else's grid. It powers on yours. BigBattery offers LiFePO4 battery systems built to power your home fully off-grid whether day or night, so you can enjoy the great outdoors.
What do you want to power?
Browse all off-grid systems
NEXUS + APEX-6.5K / 14.3 kWh System
Best all-in-one for a house
ETHOS + EG4 6000XP / 10.24 kWh System
Modular power you can grow
EG4 280Ah All-Weather + EG4 6000XP / 14.3 kWh System
Rugged all-weather power
EG4 280Ah All-Weather + EG4 12000XP V2 / 14.3 kWh System
Rugged all-weather power
EG4 314Ah All-Weather + EG4 6000XP / 16 kWh System
Max all-weather capacity
EG4 314Ah All-Weather + EG4 12000XP V2 / 16 kWh System
Max all-weather capacity
EG4 314Ah Indoor + EG4 6000XP / 16 kWh System
High-capacity indoor storage
EG4 314Ah Indoor + EG4 12000XP V2 / 16 kWh System
High-capacity indoor storage
ETHOS + EG4 12000XP V2 / 10.24 kWh System
Modular power you can grow
NEXUS + EG4 6000XP / 14.3 kWh System
Best all-in-one for a house
NEXUS + EG4 12000XP V2 / 14.3 kWh System
Best all-in-one for a house
NEXUS + APEX-10K / 14.3 kWh System
Best all-in-one for a house
HUSKY 2 48V + EG4 6000XP / 10.24 kWh System
Compact stackable power
HUSKY 2 48V + Victron 5000W / 10.24 kWh System
Compact stackable power
HUSKY 2 24V + Victron 3000W / 5.12 kWh System
Compact stackable power
HUSKY 2 12V + Victron 3000W / 5.12 kWh System
Compact stackable power
HUSKY 2 12V + AIMS 2000W / 5.12 kWh System
Compact stackable power
HUSKY 2 48V + EG4 12000XP / 20.48 kWh System
Compact stackable power
HUSKY 2 48V + Victron 3000W / 5.12 kWh System
Compact stackable power
HUSKY 2 12V + AIMS 2000W Pure Sine / 5.12 kWh System
Compact stackable power
Built for Remote Reliability
When you're off the grid, your power can't be. Every system is built on safe LFP chemistry and backed by real U.S. support.
U.S.-Based Support
Live chat, call & email with real off-grid experts — never offshore.
12-Year Warranty
Full battery coverage, backed by a U.S. manufacturer that stands behind it.
Fast, Free Shipping
Complete systems ship nationwide in 1–3 business days from CA & TX.
Safest Chemistry
Non-toxic LiFePO₄ (LFP) — no thermal runaway, rated for 8,000+ cycles.
Off-Grid Customer Reviews
“Excellent upgrade for my Club Car, ditching the old water-filled lead-acid batteries for these lithium packs was a game-changer. Their technical support was solid and walked me through everything I needed to know over the phone.”
“Would recommend the 48v Husky 2 all day long. We use these for a mobile food facility and the Husky 2 battery is an extremely capable battery. Ask for Dylan if you inquire, super helpful. ”
“I had a great experience with Big Battery’s tech support. When I called, Dylan answered right away and immediately began troubleshooting with me. He quickly diagnosed that the charger was the issue and sent out a replacement right away”
Comparing Between Systems
Swipe to compareBigBattery NEXUS ESS
- Lowest cost per kwh
- high capacity - 15kwh
- Total energy independence
- 12-Year US Warranty
- Highest Scalability - 15 parallel units providing 225kWh
- Smart Thermal Management - All-climate performance control
- Advanced Integrated BMS - Intelligent safety oversight
The NEXUS delivers 15kWh of high-capacity LiFePO₄ power engineered for complete off-grid independence. With 300Ah capacity, 100A continuous discharge, and peak support up to 110A, it handles heavy-duty loads with ease. Its rugged, floor-standing design and integrated BMS with thermal suppression ensure safe, long-lasting performance in any environment. NEXUS supports parallel expansion up to 15 units for 225kWh total capacity and seamless communication through RS485, CAN, and RJ45. Compatible with EG4 6000XP or 12000XP inverters, NEXUS provides flexible, scalable energy for homes, cabins, or commercial backup systems.
Starting at $4400.00
See Configurations 1.webp)
Tier-1 Quality
Tier-1 LiFePO₄ cells
with 8,000+ cycles
Advanced BMS
Integrated BMS with
real-time protection
Safety & Reliability
Thermal suppression with
wide-temp operation
Full Communication
RS485, CAN, RJ45
communication ports
Starting at $4400.00
See ConfigurationsBigBattery ETHOS ESS
- Lowest System Price
- Easiest Installation
- Modular Capacity
- 12-Year US Warranty
- Reliable Redundancy – Full power from multiple independent modules
- Ultra Thin Low Profile - Save space with sleek design
- Single Person Install - Lighter modules & one person install
The BigBattery ETHOS Off-Grid System is a complete power solution for cabins, tiny homes, and homesteads. With modular & stackable 5.12kWh batteries, ETHOS effortlessly scales alongside your growing energy needs. Each unit features an IP65-rated enclosure, thermal suppression, and an advanced BMS with auto-balancing for maximum safety. Paired with EG4 inverters - 6000XP, 12000XP, or the 18kPV Hybrid - you get seamless UPS backup, smart load control, and AC coupling. ETHOS delivers reliable, expandable, and efficient off-grid energy independence.
Starting at $4304.99
See Configurations 3.webp)
Advanced BMS + Auto-Balancing
Ensures long life
and cell protection
IP65 + Thermal Suppression
Rugged, safe,
all-season operation
EG4 Inverter Integration
6000XP, 12000XP, or 18kPV with
UPS, load control, and AC coupling
High Solar Input Capacity
Supports PV arrays
up to 24,000W
Starting at $4304.99
See ConfigurationsBigBattery HUSKY 2 INV 48V ESS
- Most Compact
- Live App Monitoring
- Vibration resistant
- 12-Year US Warranty
- Rugged Protection – Durable weather-ready shielding
- Low Voltage Reset Technology – Prevents battery bricking
- Dual Thermal Suppression – 2 independent units in every battery
The BigBattery HUSKY 2 INV 48V ESS Kits are complete lithium power solutions for all types of off-grid residences. Built on our most energy-dense LiFePO₄ platform, they deliver safe, reliable storage with Tier 1 cells, advanced BMS protections, and IP65 durability. With options from compact to large-scale systems, each kit pairs expandable storage with high-performance inverters for dependable backup and off-grid power. Whether you’re seeking energy independence or powering remote locations, HUSKY 2 Kits provide flexible, efficient, and long-lasting energy independence.
Starting at $4,704.99
See Configurations
Advanced BMS Protection
Safeguards against over/under
voltage, current, thermal issues
IP65 Durable Enclosure
Vibration-resistant, weather-ready
for off-grid cabins & homes
Self-Heating Function
Ensures optimal performance in
all cold weather conditions
Scalable Storage
Kits available from
5.12kWh-20.48kWh (1-4 batteries)
Starting at $4,704.99
See ConfigurationsEG4 Wallmount 280Ah All Weather ESS
- Rugged OutDoor
- Fewer parts
- flexible application
- 10-year us warranty
- Field-Serviceable Modules – Quick maintenance without disassembly
- Trusted – Most number of US installations
- Dual Fire Arrestors – Enhanced outdoor safety protection
The EG4 All Weather Battery packs 14.3kWh of LiFePO₄ storage with 200A output and 8,000+ cycles, delivering unmatched reliability and power in off-grid environments. Engineered for safety with internal self-heating, EMP protection, thermal suppression, and an emergency stop button. Pair it with the 6000XP inverter (6kW, 8kW PV) for mid-sized systems, or the 12000XP inverter (12kW, 24kW PV) for larger setups. Together, the kits deliver complete off-grid power for homes, cabins, and backup needs.
Starting at $4,624.98
See Configurations
All Weather Power
Outdoor-rated, weather
-sealed enclosure
Advanced Management
Intelligent BMS + LCD
monitoring
Advanced Features
Internal self-heating,
EMP protection, E-stop
Load Capable
Dual MPPT inverters up
to 24kW PV
Starting at $4,624.98
See ConfigurationsEG4 Wallmount 314Ah All Weather ESS
- High capacity storage
- Connected Ownership
- High-Density Energy
- UL Certified Whole-Home
- EG4 Smart BMS – Active cell balancing for improved efficiency and longevity
- Scalable System Architecture - Auto-Addressing Integration with closed-loop
- IP Rated – Supports to withstand dust, water, and temperature extremes
The EG4 WallMount 314Ah All-Weather Battery is a high-capacity 16kWh, 51.2V LiFePO₄ energy storage solution designed for outdoor solar, off-grid, and whole-home backup systems. Featuring a rugged IP67 enclosure, built-in cold-weather heaters, and smart Bluetooth/Wi-Fi monitoring, it delivers dependable performance in demanding environments. When paired with the FLEXBOSS18, it offers a scalable, certified platform for residential and light commercial energy storage.
Starting at $5,414.97
See Configurations
Battery Capacity | 16kWh/module
High-capacity LiFePO₄ storage
per wall-mounted battery
Scalable System | 512kWh
Expandable uptp 32 batteries
for residential & commercial
Warranty | 10-Year
EG4 manufacturer support
within the USA
Cycle Life | 10,000+ cycles
LiFePO₄ chemistry tested at 80% depth of discharge
Starting at $5,414.97
See ConfigurationsEG4 Wallmount 314Ah Indoor ESS
- High capacity storage
- auto-id plug & play
- built for Longevity
- latest generation bms
- Quite, Compact & Efficient – Natural cooling for silent performance
- Heavy Load Support - 200A output for demanding loads
- Dual-Mount Flexibility – Supports both wall and floor installation
The EG4 WallMount 314Ah Indoor Battery delivers 16kWh of dependable energy storage with 200A continuous output-making it a powerful core component of any home or small-business ESS. Fully compatible with the EG4 FlexBoss18 and FlexBoss21 inverters, it forms a scalable, high-performance energy storage system that provides reliable backup, efficient daily cycling, and smart power management. Its compact indoor design, advanced BMS, self-heating feature, and long 10-year warranty make it a trusted solution for long-term, whole-home energy independence.
Starting at $4,992.97
See Configurations
Battery Capacity | 16kWh/module
Scalable battery modules for
easy expansion
Scalable System | 256kWh
Expandable for residential
& commercial needs
Warranty | 10-Year
EG4 manufacturer support
within the USA
Cycle Life | 10,000+ cycles
LifePO4 chemistry with
10,000+ cycle life
Starting at $4,992.97
See ConfigurationsBigBattery HUSKY 2 INV 24V ESS
- Most Compact
- Live App Monitoring
- Vibration resistant
- 12-Year US Warranty
- Rugged Protection – Durable weather-ready shielding
- Low Voltage Reset Technology – Prevents battery bricking
- Dual Thermal Suppression – 2 independent units in every battery
The BigBattery HUSKY 2 24V ESS Kits deliver reliable, flexible power for all type of off-grid home backup. Built on our LiFePO₄ HUSKY2 platform, they pair Tier 1 cells, advanced BMS protection, and IP65 durability with the Victron MultiPlus-II inverter/charger. These systems support seamless off-grid solar integration, PowerControl and PowerAssist up to 100A, and WiFi-enabled monitoring for easy control. From road trips to off-grid living, HUSKY 2 24V Kits offer safe, scalable, and dependable energy independence.
Starting at $2725.25
See Configurations 2.webp)
Advanced BMS Protection
Safeguards against over/under
voltage, current, thermal issues
IP65 Durable Enclosure
Vibration-resistant, weather-
ready for off-grid cabins & homes
Self-Heating Function
Ensures optimal performance in
all cold weather conditions
Scalable Storage
Kits available from
5.12kWh-20.48kWh (1-4 batteries)
Starting at $2725.25
See ConfigurationsBigBattery HUSKY 2 INV 12V ESS
- Most Compact
- Live App Monitoring
- Vibration resistant
- 12-Year US Warranty
- Rugged Protection – Durable weather-ready shielding
- Low Voltage Reset Technology – Prevents battery bricking
- Dual Thermal Suppression – 2 independent units in every battery
The BigBattery HUSKY 2 12V ESS Kits deliver high-capacity lithium power for all types of off-grid residences. Ranging from 5.12kWh to 20.48kWh, these kits combine Tier 1 LiFePO₄ cells, advanced BMS protection, IP65 enclosures, and cold-weather self-heating. Choose Victron MultiPlus-II inverters with WiFi monitoring or AIMS Power inverters with heavy-duty surge handling. Wherever you go, HUSKY 2 12V Kits provide safe, scalable, and reliable off-grid energy.
Starting at $2744.25
See Configurations 1.webp)
Advanced BMS Protection
Safeguards against over/under
voltage, current, thermal issues
IP65 Durable Enclosure
Vibration-resistant, weather-
ready for off-grid cabins & homes
Smart Inverter Technology
WiFi remote monitoring, transformer-based
clean power and surge capacity
Scalable Storage
Kits available from
5.12kWh-20.48kWh (1-4 batteries)
Starting at $2744.25
See ConfigurationsAbout Our Off-Grid Solar Battery Systems
BigBattery's off grid battery systems are built for homes, cabins, and ranches that need reliable power with no utility connection — and dependable blackout protection if you're still grid-connected. Every kit combines a LiFePO4 battery bank with an off grid inverter, backed by an advanced battery management system that continuously monitors charge level, temperature, and cell health.
Many systems also include built-in redundancy across independent battery modules and are designed for easy installation and scalability as your energy needs grow.
- Advanced BMS Protection — Thermal suppression, low-voltage reset, and automatic cell balancing
- Scalable Design — Stack additional battery modules as your energy needs grow
- Higher Energy Density — More stored power in a smaller, lighter footprint
| LiFePO4 (BigBattery) | Lead-Acid | |
|---|---|---|
| Cycle Life | 8,000–10,000+ cycles | 300–500 cycles |
| Depth of Discharge | ~100% usable | ~50% usable |
| Maintenance | None — no watering, no terminal cleaning | Regular watering & terminal cleaning |
| Off-Gassing | None | Yes |
| Battery Chemistry | Stable lithium iron phosphate | Lead-acid |
| Built-In Safety | Advanced BMS + thermal suppression | Minimal built-in protection |
Frequently Asked Questions
Also, any home that has an off grid solar system more or less needs a battery energy storage solution (BESS) to store surplus produced during peak hours so that it can be used at a later time, such as when it's cloudy, or at night. Off-grid homes would waste their surplus energy were it not for battery storage solutions.
Ready to get started? Get in touch and we'll walk you through all of your options.
Our off grid solar systems pair LiFePO4 battery banks with a matched off grid inverter to deliver complete energy independence — no utility connection required. Every off grid battery system runs on lithium iron phosphate battery chemistry with a built-in battery management system for safe, scalable power.