EG4 Batteries

All Batteries 48 Volt

48 Volt Batteries

EG4 EG4LIFPOW4WM-48V280A 14.3kWh 280Ah 48V Wall-Mount Indoor Low-Voltage LiFePO4 Battery

AMP Hours280 Ah
Voltage48 V
ChemistryLithium, LiFePO4

Delivery on May 15–20

EG4 PowerPro EG4LIFPOW4-48V280A 14.3kWh 280Ah 48V Outdoor/Waterproof Heated Lithium Battery

AMP Hours280 Ah
Voltage48 V
ChemistryLithium

Delivery on May 15–20

Overview
Articles

EG4 makes lithium iron phosphate batteries built for home solar storage, off-grid systems, and backup power, and they've earned a reputation for solid hardware without the price tag of premium brands.

This guide covers every current model, explains the numbers that actually matter on a spec sheet, and helps you figure out which unit makes sense for your setup.

What is an EG4 battery?

EG4 Electronics is a U.S.-based company focused on residential and commercial solar equipment. All their batteries use lithium iron phosphate (LiFePO4) chemistry — the preferred choice for home energy storage.

Why LiFePO4? A lithium iron phosphate battery is chemically more stable than standard lithium-ion, meaning no thermal runaway risk. It outlasts lead-acid by a wide margin. And it handles deep discharges without degrading the cells the way other battery types do.

Every EG4 battery ships with UL 1973 and UL 9540A certifications. These are what local inspectors and insurance companies look for — worth checking before you buy anything that needs a permit. Every model also includes a 10-year warranty and a built-in Battery Management System (BMS) that handles overcharge, over-discharge, short circuits, and temperature protection.

EG4 battery models: what's available

EG4 makes two types of battery for solar energy storage: server rack units (compact, modular) and wall-mount units (large format, fixed to a wall). Here's the full lineup at a glance:

EG4 LifePower4 48V battery

The LifePower4 is EG4's entry-level server rack battery — 5.12 kWh per unit, fits a standard 19-inch server rack. You can wire up to 64 units in parallel, which means you can start with one or two and add more later without touching the rest of the system.

It supports RS485 and CAN bus communication and pairs with most major inverters: Sol-Ark, Schneider, Growatt, EG4, and others.

If the budget is the main constraint and you want to grow the system over time, this is where to start.

EG4 LL-S 48V battery

Same voltage and capacity as the LifePower4 (5.12 kWh at 48V), but with a few real upgrades worth paying for. Most notably, there's a 3.5-inch color LCD touchscreen on the front for checking cell voltages, state of charge, and temperature in real time — something the LifePower4 doesn't have. There's also an emergency stop button for fast shutdown and a more capable BMS monitoring firmware.

If you want actual visibility into what your battery bank is doing without connecting to an external monitor, the EG4 LL-S battery is worth paying more for.

EG4 WallMount Indoor battery 48V 280Ah

This is what most people land on for home battery backup and whole-home coverage. It packs 14.3 kWh into a single wall-mounted unit, with a 200A BMS, 600A busbars, an LCD touchscreen, dual fire arrestors, and an E-Stop. The self-heating system turns on automatically below 32°F, so winter isn't a problem.

Compared to a rack setup with the same capacity, you get fewer cable runs and a cleaner installation.

If you have a wall in a utility room or garage to mount it on, this is a practical option.

EG4 WallMount All Weather 48V 280Ah — outdoor battery

The EG4 outdoor battery version of the 280Ah WallMount. The IP65-rated enclosure handles dust and direct water jets, making it suitable for garages, exterior walls, and installations with weather exposure.

One real tradeoff: max continuous discharge drops to 140A instead of 200A. But the rest stays intact — 14.3 kWh, self-heating, 8,000-plus cycles, 10-year warranty.

As a self-heating battery rated IP65, it's a reasonable pick for outdoor solar installations where conditions aren't extreme.

EG4 WallMount All Weather 48V 314Ah — flagship outdoor battery

EG4's newest model, and their best one. It stores 16 kWh, carries an IP67 rating (dust-tight, and can handle temporary water submersion), and runs EG4's third-generation BMS with active cell balancing and built-in Wi-Fi for remote monitoring.

Cycle life is 10,000-plus at 80% DoD. You can parallel up to 32 units, which puts total system capacity at 514 kWh.

If you're investing in a serious outdoor system and don't want to upgrade in five years, this is the one to look at.

Model	Voltage	Capacity	Energy	Form factor	IP rating	Cycle life
LifePower4 V2	48V	100Ah	5.12 kWh	Server rack	Indoor	6,000
LL-S	48V	100Ah	5.12 kWh	Server rack	Indoor	6,000
WallMount Indoor 280Ah	48V	280Ah	14.3 kWh	Wall mount	Indoor	8,000
WallMount All Weather 280Ah	48V	280Ah	14.3 kWh	Wall mount	IP65	8,000
WallMount All Weather 314Ah	48V	314Ah	16 kWh	Wall mount	IP67	10,000

Which EG4 battery is right for you?

Your situation	Best pick
Tight budget, plan to add capacity later	LifePower4 V2
Rack battery with a monitoring screen	LL-S
Large indoor install, whole-home backup	WallMount Indoor 280Ah
Outdoor or garage install, moderate climate	WallMount All Weather 280Ah
Outdoor install, cold climate, maximum capacity	WallMount All Weather 314Ah

EG4 wall mount batteries give you more storage per unit and cleaner wiring. Any EG4 battery 48V rack unit lets you scale one module at a time without a large upfront cost. The choice usually comes down to how your space is laid out and whether you'd rather buy capacity gradually or all at once.

Key specs to understand before you buy

Voltage: Most home solar systems run on 48V. Every EG4 48V battery in this guide operates at 51.2V nominal — sold and described as 48V, which is what residential inverters expect.
Capacity (Ah vs. kWh): Ampere-hours (Ah) measure raw stored charge. Kilowatt-hours (kWh) tell you how much usable energy that represents. When sizing a system, work in kWh. A 100Ah battery at 48V gives you about 5.12 kWh.
Depth of discharge (DoD): The share of total capacity you can use before the battery needs recharging. EG4 batteries are rated at 80% DoD. Lead-acid batteries max out at 50%, so a 100Ah EG4 LiFePO4 battery actually deliversmore usable energy than a 100Ah lead-acid — even at the same nominal rating.
Cycle life: One cycle is one full charge plus one full discharge. At 80% DoD, EG4 batteries are rated for 6,000 to 10,000 cycles. A system that cycles once per day will hit those numbers in 16 to 27 years.
Battery Management System (BMS): The BMS monitors cell voltages, temperature, and current and shuts the battery down if something goes wrong. A 200A BMS handles heavier loads than a 100A unit. Cell balancing and low-temperature charge protection are the features worth looking for.
Self-heating: LiFePO4 cells can't charge safely below freezing. EG4 wall-mount batteries have a built-in heater that turns on automatically below 32°F to protect the cells and keep the system running through cold weather.
IP rating: IP65 means fully dust-tight and protected against water jets. IP67 adds protection against brief submersion. Any battery going outdoors needs at least IP65.
Certifications: UL 1973 covers battery safety. UL 9540A covers fire safety for energy storage systems. Both are typically required when pulling permits for a residential install.

EG4 vs. other deep cycle battery types

Feature	EG4 LiFePO4	Standard lithium (NMC)	Lead-acid (AGM/Gel)
Cycle life	6,000–10,000	1,000–2,000	200–1,000
Usable DoD	90%	80%	50%
Thermal safety	Excellent	Moderate	Good
Weight	Light	Lightest	Very heavy
Lifespan	15–20 years	5–10 years	3–7 years
Round-trip efficiency	~99%	~95%	~85%

Lead-acid is cheaper upfront. Over a 10-year window, it usually isn't — between shorter cycle life, lower usable capacity per Ah, and lower round-trip efficiency (meaning more energy lost on every charge cycle), the math tends to shift.

NMC (standard lithium-ion) is lighter, but it carries a thermal runaway risk that LiFePO4 doesn't. For a LiFePO4 deep cycle battery mounted to a wall and running daily, that stability is a real advantage — not just a spec sheet talking point.

The Bottom Line

EG4 covers most home solar storage scenarios without overcomplicating the decision. Tight budget and room to grow? Start with the LifePower4. Need a single large unit indoors? The 280Ah WallMount handles whole-home backup cleanly. Going outdoors in a cold climate? The 314Ah All Weather is worth the extra investment.

All five models share the same LiFePO4 chemistry, 10-year warranty, and UL certifications — so the choice mostly comes down to how much capacity you need and where the battery is going.

If you're not sure which model fits your system, our team can help you work through the sizing before you buy.

Frequently asked questions

How long does an EG4 battery last?

Rated for 6,000 to 10,000 cycles at 80% depth of discharge. In a system cycling once per day, that's 16–27 years before capacity drops to 80% of its original rating. The full lineup is backed by a 10-year manufacturer warranty.

Can EG4 batteries be used outdoors?

Yes. The EG4 WallMount All Weather series is designed for outdoor installation. The 280Ah model is IP65-rated; the 314Ah model is IP67. Both have self-heating for cold-weather operation.

How many EG4 batteries do I need?

According to EIA data, the average U.S. home uses about 29 kWh per day, though this varies by home size and climate. Three WallMount 280Ah batteries (3 × 14.3 kWh = 42.9 kWh) covers roughly a full day of average consumption. Your actual number depends on which loads you want backed up and for how long — partial-home backup needs far less than full-home coverage.

Are EG4 batteries compatible with my inverter?

EG4 batteries use RS485 and CAN bus communication protocols. Confirmed compatible inverter brands include Sol-Ark, Schneider, Victron, Growatt, Deye, Luxpower, Megarevo, and EG4. Check your specific inverter's compatibility documentation before purchasing.

Do EG4 batteries work in cold weather?

Yes. The wall-mount models have an internal heater that activates automatically below 32°F, protecting the cells from cold-weather charging damage and keeping the system operational through winter.

Where can I buy EG4 batteries?

A1 SolarStore stocks the full EG4 battery lineup — from server rack units to the latest All Weather WallMount models. If you're not sure which model fits your system, our team can help you work through the sizing before you buy.