Inverter Battery Prices at Mercury Direct (April 2026)

These are current Mercury Direct prices for standalone inverter batteries. Prices move with the naira exchange rate, so confirm today’s price on WhatsApp before you buy.

Lithium Battery Systems (Inverter + Battery + Solar Panels)

Mercury Direct sells lithium exclusively as complete systems for optimal performance and warranty coverage. Each system includes the inverter, LiFePO4 battery, and monocrystalline solar panels.

Prices current as of April 2026 and subject to change with exchange rate movements.

Which Battery Should You Buy?

If you already know what you want, here is the short version:

• Cheapest option with decent backup: Mercury Elite 220Ah Tubular at ₦295,000. You get 220Ah of capacity and strong deep-cycle performance. Trade-off: you need to top up distilled water every 2 to 4 weeks and ventilate the battery area.
• Maintenance-free for home use: Mercury 200Ah GEL at ₦383,000. Sealed, no water checks, handles Nigerian heat well. This is our most popular battery for homes.
• Starter system on a tight budget: Mercury 65Ah GEL at ₦159,000 or Mercury 100Ah GEL at ₦240,000. Good for basic loads (lights, fans, phone charging, laptop).
• Best long-term value / going solar: Lithium 10kWh system at ₦5,538,000. Higher upfront cost, but you avoid 2 to 3 lead-acid replacement cycles and the battery lasts 10+ years with 95% usable capacity.

Not sure which one fits? Keep reading for the full breakdown, or send us your inverter size and appliance list on WhatsApp and we will tell you exactly what to buy.

Understanding Battery Types

There are four main battery types used in Nigerian inverter systems. Here is what you need to know about each one:

Tubular Batteries (Flooded Lead-Acid)

Tubular batteries have been the workhorse of Nigerian inverter systems for over a decade. They use a tubular plate design that provides better active material retention than flat plate batteries, which translates to longer cycle life.

The main advantage is price per amp-hour. Tubular batteries give you the most capacity per naira. The downside? They require regular maintenance: checking electrolyte levels every 2 to 4 weeks and topping up with distilled water. They also release hydrogen gas during charging, so proper ventilation in your battery room is not optional.

GEL Batteries (Sealed Lead-Acid)

GEL batteries use a silica-based gel electrolyte instead of liquid acid. The gel immobilises the electrolyte, which means no spills, no topping up, and no hydrogen gas in normal operation. They are sealed and maintenance-free.

GEL batteries handle deep cycling better than AGM batteries, making them a strong choice for Nigerian inverter systems. They also perform well in high ambient temperatures, which matters when your battery sits in a Lagos room at 32 to 35 degrees Celsius.

The trade-off: GEL batteries cost more per amp-hour than tubular batteries and are sensitive to overcharging. Your inverter’s charge controller must be set correctly for GEL chemistry, or you will kill the battery in under a year.

AGM Batteries (Absorbed Glass Mat)

AGM batteries use a fibreglass mat separator that absorbs the electrolyte. They are also sealed and maintenance-free. AGM batteries have lower internal resistance than GEL, which means they can deliver higher current bursts. This can be useful in systems where motors and compressors create brief surge loads on startup, though for sustained heavy loads like air conditioning, your inverter size matters more than your battery chemistry.

However, AGM batteries do not handle deep cycling as well as GEL or tubular types. They tend to degrade faster under the repeated deep discharge that is common in Nigerian conditions. Most installers recommend GEL over AGM for inverter backup in Nigeria unless you have a specific technical reason to choose AGM.

Lithium Batteries (LiFePO4)

Lithium iron phosphate (LiFePO4) batteries are the premium option and the future of solar energy storage in Nigeria. They offer 95% depth of discharge, 3,000 to 6,000 cycle life, zero maintenance, and roughly one-third the weight of equivalent lead-acid batteries.

The Mercury 5kVA with 10kWh lithium system is our most popular lithium offering. Over a 10-year period, lithium works out cheaper than lead-acid because you avoid 2 to 3 battery replacement cycles. The upfront cost is the barrier for most buyers, but if you can afford it, lithium is the smarter long-term investment.

Battery Specs: Cycle Life, DoD, and What They Mean for You

How to Size Your Inverter Battery Bank

Choosing the right battery capacity is not guesswork. Use this formula to calculate exactly how many amp-hours you need for your home or business:

Worked Example: Sizing for a Typical Lagos Flat

Let us say you need to power the following for 8 hours overnight:

Using a 24V inverter system with GEL batteries (80% DoD, 85% efficiency):

This gives you approximately 7.5 hours of backup with the load above. If you want the full 8 hours with a safety margin, consider 2 × 220Ah batteries or upgrading to a 48V system. Use our battery runtime calculator to play with different configurations.

Why Buy Your Battery from Mercury Direct

You can buy an inverter battery from any market stall in Lagos, Aba, or Onitsha. Here is why that is risky, and why thousands of Nigerian homes and businesses buy from Mercury Direct instead:

• Genuine capacity, not fake ratings: Cheap batteries from unbranded sellers often claim 200Ah on the label but deliver 120Ah or less. Mercury batteries are rated honestly. The 200Ah you pay for is the 200Ah you get.
• Proper sizing before you buy: We do not just sell you a battery. We ask about your inverter, your appliances, and your backup hours, then recommend the right battery bank. No overselling, no underselling.
• Real warranty, not empty promises: 1-year warranty on GEL batteries, 2 years on tubular, and 5 years on lithium systems. If something goes wrong, you call one number: 0703 745 1701. Try that with a market seller six months later.
• Correct charge settings advice: We help you configure your inverter’s charge profile to match your battery chemistry. Wrong settings are the number one cause of premature battery death in Nigeria, and most market sellers do not even mention it.
• Same-day delivery in Lagos: Order today, receive today. Your battery arrives ready to connect.
• Nationwide delivery: Anywhere in Nigeria within 48 hours.

Related Battery Guides

Once you have chosen your battery, these guides will help you get the most out of it:

• Wiring and connection: How to connect your inverter to battery (series vs parallel, cable sizing, safety)
• Battery lifespan: How to extend your battery life by up to 50% (ventilation, charge settings, maintenance tips)
• Solar panel connection: How to connect solar panels to batteries
• Generator vs inverter costs: Inverter or generator: which is the best option?
• Runtime calculator: How many hours will your battery last?

Matching Batteries to Mercury Inverters

Every Mercury inverter has a specific battery voltage requirement and recommended bank size. Here is what works best with each model:

Not sure which inverter you need? Our guides on what a 1.5kVA can power, what a 3.5kVA can power, and what a 5.5kVA can power break it down by appliance. You can also read the full inverter buying guide for Nigeria or check pure sine wave vs modified sine wave if you are still deciding on inverter type.

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