240V Batteries

240V Batteries are out of stock

Subscribe to updates – we'll let you know when 240V Batteries are back in stock. Normally, we update products every 2 weeks.

Best 240V Batteries alternativesBest choice

Interstate DCM0035 35Ah 12V AGM Deep-Cycle Battery

AMP Hours35 Ah
Voltage12 V
ChemistryLead Acid, AGM

Delivery on Jun 01–04

Interstate GEL0035 31Ah 12V Gel Deep-Cycle Battery

AMP Hours31 Ah
Voltage12 V
ChemistryLead Acid, Gel
Group sizeU1

Delivery on Jun 01–04

Interstate DCM0055 55Ah 12V AGM Deep-Cycle Battery

AMP Hours55 Ah
Voltage12 V
ChemistryLead Acid, AGM

Delivery on Jun 01–04

Trojan Pacer P-105 LPT 220Ah 6V Deep-Cycle Flooded Battery Golf Cart & RV

AMP Hours220 Ah
Voltage6 V
ChemistryLead Acid, Flooded
Group sizeGC2

Pickup on Mon, Jun 1 from Miami, FL

Delivery on May 29 – Jun 03

Interstate GEL0055 55Ah 12V Gel Deep-Cycle Battery

AMP Hours55 Ah
Voltage12 V
ChemistryLead Acid, Gel

Delivery on Jun 01–04

Trojan Pacer P-875 LPT 165Ah 8V Deep-Cycle Battery Flooded Lead-Acid Golf Cart & Industrial Use

AMP Hours165 Ah
Voltage8 V
ChemistryLead Acid, Flooded
Group sizeGC8

Pickup on Mon, Jun 1 from Miami, FL

Delivery on May 29 – Jun 03

Interstate DCM0075 75Ah 12V AGM Deep-Cycle Battery

AMP Hours75 Ah
Voltage12 V
ChemistryLead Acid, AGM

Delivery on Jun 01–04

Trojan Motive T-605 LPT 210Ah 6V Deep-Cycle Flooded Battery Golf Cart & Industrial

AMP Hours210 Ah
Voltage6 V
ChemistryLead Acid, Flooded
Group sizeGC2

Pickup on Mon, Jun 1 from Orlando, FL

Delivery on May 29 – Jun 03

Overview
Articles

Shopping for a 240V battery backup — or a 240 volt battery backup, as it appears on many spec sheets — but not sure where to start? You're not alone. The terminology gets confusing fast, and the wrong choice can mean underpowered equipment or money wasted.

This guide covers what a 240V battery actually is, how it produces power, what types are available, which chemistry fits your situation, and what numbers to check before buying.

What is a 240V battery?

A 240V battery is not a single cell that outputs 240 volts. It's a battery system — a bank of deep cycle batteries paired with an inverter/charger that converts stored DC power into 240V AC electricity, the standard voltage used by most home appliances and heavy equipment in the US.

The batteries themselves store energy at 12V, 24V, or 48V DC. The inverter converts that stored energy into the 240 volt battery output your home needs.

The system can run refrigerators, HVAC units, well pumps, power tools, and any other 240V appliance — as a backup when the grid fails, or as a primary power source off-grid.

How does a 240V battery system work?

Energy moves through the system in one direction:

Solar panels / Grid → Charge controller → Battery bank → Inverter/charger → 240V AC output

Each component has a specific job:

Battery bank: stores energy in DC form (12V, 24V, or 48V)
Inverter/charger: the 240V battery inverter that converts DC to 240V AC; also recharges batteries from the grid or a generator
BMS (Battery Management System): protects against overcharging, over-discharging, overheating, and short circuits
Charge controller: regulates power from solar panels to prevent battery damage

Most US systems output split-phase 120/240V, so you get both 120V (standard outlets) and 240V (heavy appliances) from one system.

Types of 240V battery systems

Four main types cover the range from plug-and-play portables to full home installations.

Type	Description	Best for
Portable power station	All-in-one unit with built-in inverter and battery. No installation needed.	Camping, RV, short-term backup
Modular home battery system	Expandable rack or wall-mount batteries with an external inverter. Hard-wired to your sub-panel.	Whole-home backup, solar storage
Custom battery bank	Individual deep cycle batteries with a separate inverter. Most flexible, requires DIY knowledge.	Off-grid homes, large solar systems
UPS-style 240V backup	Monitors grid power and switches over automatically in milliseconds.	Sensitive electronics, well pumps, medical equipment

A 240V battery power station (the portable type) is the easiest starting point — no electrician required. A modular or custom system gives you more capacity and better long-term value, but it needs professional installation. For a permanent 240V home battery backup, a modular system wired to your electrical panel is the standard choice.

Battery chemistry: LiFePO4 vs. lead-acid

The two chemistries you'll run into most in 240V systems are LiFePO4 (lithium iron phosphate) and lead-acid — which comes in three variants: flooded (wet cell), AGM, and Gel. NMC lithium shows up in some portable power stations.

Feature	LiFePO4	Lead-acid
Cycle life	3,000–8,000	200–500
Usable capacity (DoD)	80–100%	~50%
Weight	Light	Heavy
Maintenance	None	Varies by type
Safety	High	Moderate
Upfront cost	Higher	Lower
Long-term cost	Lower	Higher

"A 240V lithium battery (LiFePO4) costs more upfront but lasts 6–16x longer than lead-acid. Over 10 years, lithium almost always works out cheaper. It's the go-to solar battery chemistry for home energy storage. Lead-acid still makes sense for tight budgets or systems that only get used occasionally."

— Vic, solar engineer with 20 years of experience

What can you power with a 240V battery backup?

Appliance	Typical wattage	Hours on a 10 kWh system
Refrigerator	150W	~50 hrs
Well pump (240V)	750–1,500W	7–13 hrs
Central AC (small)	2,000–3,500W	3–5 hrs
Washing machine	500W	~20 hrs
LED lighting (10 bulbs)	100W	~80 hrs
Power tools	1,000–2,000W	5–10 hrs

A 240V battery backup for well pump use is one of the most common applications. Well pumps run on 240V and go silent during a grid outage without dedicated backup. A 10–15 kWh system works well as a battery backup for home power outage scenarios, covering essential loads for 24–48 hours. For whole house battery backup, plan for 20–30 kWh or more depending on your load.

Key specs to check before you buy

Capacity (kWh). How much energy the system stores. Bigger means longer backup time. Most homes need 10–30 kWh for real backup coverage.

Continuous power output (W/kW). The maximum load the inverter can handle at once. It needs to exceed your highest combined load.

Surge power. Motors — pumps, AC units, refrigerators — need 2–3x their running wattage to start. Check that the surge rating covers this.

Depth of Discharge (DoD). How much of the battery you can actually use. LiFePO4: 80–100%. Lead-acid: about 50%. A 10 kWh lead-acid system gives you only around 5 kWh of usable energy.

Cycle life. How many full charge/discharge cycles the battery handles before dropping below 80% capacity.

Inverter compatibility. If you're building a custom system, the battery bank voltage (12V/24V/48V) must match the inverter's DC input.

Scalability. Can you add batteries later? Modular systems allow this; portable units usually don't.

Certifications. Look for UL 9540, UL 1973, CE, or UN38.3. These confirm independent safety testing.

💡 A 240V battery charger is sometimes sold separately for custom systems. Check that it matches your battery chemistry and voltage before buying. If you're pairing the system with panels, look for a 240V solar battery system with a built-in charge controller for simpler setup.

How to size a 240V battery system

✔️ Calculate daily energy use: Check your electricity bill for kWh/day. The US average is about 30 kWh/day. For backup of essentials only, estimate 5–10 kWh/day.

✔️ Decide on days of autonomy: Two to three days without grid power is the standard target for most off-grid or backup setups.

✔️ Divide by DoD: For LiFePO4, divide by 0.8. For lead-acid, divide by 0.5. That gives you the total battery capacity you need.

✔️ Add a 15–20% safety margin: This covers efficiency losses from wiring, the inverter, and temperature.

Example: 10 kWh/day × 2 days = 20 kWh ÷ 0.8 (LiFePO4 DoD) × 1.2 (safety margin) = ~30 kWh battery bank.

Choosing the right 240V battery system

Two things matter most: chemistry and sizing.

On chemistry

LiFePO4 is the right call for most buyers. The cycle life is longer, the usable capacity is higher, and the 10-year cost works out lower despite the bigger upfront number. Lead-acid is worth considering only if the budget is tight and the system won't see heavy use.

On sizing

Don't size for your total home consumption. Figure out what you actually need to keep running — refrigerator, well pump, lights, maybe one HVAC zone — and build around that. Most households find 10–20 kWh covers the essentials comfortably.

If you need a portable 240V battery pack for RV or short outages, a power station is the simplest path. For whole home battery backup or solar storage, a modular system with a proper inverter and panel connection is the more reliable long-term solution. A 240V backup battery in a modular setup can also double as a home battery backup that charges from the grid during off-peak hours.

A1 SolarStore carries 240V battery systems, and can help you match the right setup to your actual load and budget.

FAQ

Is a 240V battery the same as a deep cycle battery?

Not exactly. A deep cycle battery is the storage component inside a 240V system. The full 240V battery bank includes deep cycle batteries plus an inverter that converts DC power to 240V AC output.

What's the difference between a 240V battery backup and a generator?

A 240V battery generator runs silently, needs no fuel, and switches on instantly during an outage. Generators are louder, need fuel and maintenance, and have a startup delay. Batteries win on convenience; generators are better for longer-duration, high-load situations.

Can I run a well pump on a 240V battery backup?

Yes. Well pumps typically draw 750–1,500W running and 2,250–4,500W at startup (2–3x the running wattage). A system with at least 4,500W surge capacity and 10–15 kWh of storage handles most residential well pumps.

Do I need an electrician to install a 240V battery backup system?

For portable power stations, no. For modular or whole-home systems that connect to your electrical panel, yes. A licensed electrician is required for safe, code-compliant installation.

Can I charge a 240V battery with solar panels?

Yes. Connecting a rechargeable 240V battery pack to solar panels through a charge controller is one of the most common setups. Most modular systems have solar input built in. Check the system's maximum solar input (W) before sizing your panel array.