HOW MANY BATTERIES FOR 2.4KVA INVERTER
A 2.4kVA inverter needs a minimum of 2 x 12V batteries connected in series to make 24V. That is the minimum and correct battery count for Mercury 2.4kVA models. But backup time depends on your load, battery type, and how hard you push the system. Two 200Ah deep cycle batteries give a typical Nigerian home 5 to 8 hours of backup for essential loads in a disciplined light-load setup. For details on what this inverter handles, see what a 2.4kVA inverter can power.
UNDERSTANDING 2.4KVA INVERTER BATTERY REQUIREMENTS
Most 2.4kVA inverters in this category use a 24V battery bank. The Mercury 2.4kVA models require exactly 2 x 12V batteries connected in series (positive of first to negative of second) to achieve 24V. Using one battery (12V) is insufficient. Using three batteries creates 36V, which can damage the inverter. Using four batteries in series creates 48V, which can damage the inverter input stage. If you want 4 batteries for longer backup, you can still stay at 24V by wiring them as two series pairs, then connecting the pairs in parallel (2S2P). Learn more about connections in our guide to connecting inverter to battery.
Mercury 2.4kVA Technical Specifications
| Specification | Details |
|---|---|
| Rated Power | 2,400VA / 2,400W (hybrid), 1,440W (modified) |
| Battery Voltage | 24V DC |
| Waveform | Pure sine wave (hybrid) / Modified (standard) |
| Transfer Time | 20ms typical |
| Efficiency | 85%+ |
| Surge Capacity | 2x rated power |
BATTERY OPTIONS FOR 2.4KVA SYSTEMS
Your two batteries must be identical in brand, capacity, and age. Mixing old and new batteries, or different brands, kills the weaker battery fast. Runtime estimates depend on battery chemistry and discharge depth. In real Nigerian use, draining lead-acid batteries too deeply may give more hours on paper, but usually shortens lifespan. For guidance on battery selection, read which battery is best for an inverter.
| Battery Type | Capacity | Price per Unit (₦) | Total for 2 (₦) | Usable Energy (at ~80% DoD) |
|---|---|---|---|---|
| Deep Cycle GEL | 200Ah | ₦380,000 to ₦420,000 | ₦760,000 to ₦840,000 | 3.84 kWh |
| Tubular Wet Cell | 220Ah | ₦280,000 to ₦310,000 | ₦560,000 to ₦620,000 | 4.22 kWh |
| AGM Battery | 200Ah | ₦290,000 to ₦330,000 | ₦580,000 to ₦660,000 | 3.84 kWh |
To get the most out of whichever battery you choose, follow our guide to increasing inverter battery lifespan by up to 50%.
RUNTIME CALCULATIONS FOR NIGERIAN HOMES
Here is what a typical small to medium Nigerian home runs on a 2.4kVA system:
| Appliance | Wattage | Qty | Total Watts |
|---|---|---|---|
| LED TV (32 to 43″) | 50W | 1 | 50W |
| Ceiling Fan | 75W | 2 | 150W |
| LED Bulbs | 10W | 4 | 40W |
| Decoder | 20W | 1 | 20W |
| Phone/Laptop Charging | 50W | 1 | 50W |
| Standing Fan | 80W | 1 | 80W |
| TOTAL | 390W |
Use our battery runtime calculator to estimate hours for your exact load.
Backup Time Calculation
Formula: Backup Hours = (Battery Ah x Voltage x DoD x Efficiency) / Load Watts
For 2 x 200Ah at 24V powering 390W: (200 x 24 x 0.80 x 0.85) / 390 = 8.4 hours. At the standard DoD of 80% with 85% inverter efficiency, two 200Ah batteries can cover a full evening of NEPA outage in a disciplined light-load setup.
Two batteries gives you the correct voltage. It does not automatically guarantee all-night backup. In Nigeria, runtime is won or lost by load discipline. For longer battery life on lead-acid, many homes size their system so they do not routinely drain below 50%, even though 80% DoD is technically possible.
RUNTIME AT DIFFERENT LOAD LEVELS
| Total Load | Backup Time (2 x 200Ah) | What You Can Run |
|---|---|---|
| 200W | 16+ hours | Lights, fans, TV only |
| 390W | 8.4 hours | Full small home setup |
| 600W | 5.4 hours | Above plus small refrigerator |
| 800W | 4.1 hours | Heavy intermittent loads |
| 1,000W | 3.3 hours | Near maximum continuous load |
MODIFIED VS. PURE SINE WAVE
The modified sine wave 2.4kVA (₦198,000 to ₦222,000) works for lights, fans, TVs, and basic electronics. But if you want to run a refrigerator or sensitive electronics, you must use the pure sine wave hybrid model (₦276,000 to ₦325,000). Modified sine wave is not recommended for fridges and other compressor loads. Read our comparison: Pure sine wave vs modified sine wave inverters.
Not sure which model fits your home? Our inverter buying guide for Nigeria walks you through the decision step by step.
RECOMMENDED MERCURY SYSTEMS BY HOME SIZE
| Home Size | Recommended System | Best For |
|---|---|---|
| Small (1 to 2 rooms) | Mercury 1.5kVA Hybrid | Lights, fans, phone charging only |
| Medium (2 to 3 rooms) | Mercury 2.4kVA Complete System | Fans, TV, lights, small fridge (hybrid) |
| Large (3 to 4 rooms) | Mercury 3.5kVA Hybrid | Home essentials + one major cold appliance (fridge or freezer). For fridge + freezer together, consider 5.5kVA + larger battery bank. |
For even larger homes or offices, see what a 5.5kVA inverter can power.
COMPLETE SYSTEM PRICING
| Component | Specification | Price (₦) |
|---|---|---|
| Mercury 2.4kVA Complete System | 24V, 2 x 200Ah batteries | ₦1,146,000 |
| Or: Hybrid Solar Inverter only | 24V, MPPT | ₦276,000 to ₦325,000 |
| Or: Modified Sine Wave Inverter only | 24V | ₦198,000 to ₦222,000 |
| Deep Cycle Batteries (2 units) | 200Ah each | ₦760,000 to ₦840,000 |
| Cables, Rack, Installation | Complete | ₦100,000 to ₦160,000 |
Need help with installation? Read our step-by-step guide on how to install an inverter.
GENERATOR VS. INVERTER COST COMPARISON
With petrol now around ₦1,250 to ₦1,450+ per litre depending on location and marketer (April 2026), running a generator 6 to 8 hours daily costs ₦110,000 to ₦175,000 per month. A Mercury 2.4kVA system pays for itself in under 12 months through fuel savings alone. Actual payback depends on how many hours you currently run your generator, petrol price in your area, and how disciplined your inverter load is.
| Scenario | Generator Cost/Month | Inverter Cost/Month | Monthly Savings |
|---|---|---|---|
| 6 hrs/day generator | ₦110,000+ | ₦10,000 (grid) | ₦100,000+ |
| 8 hrs/day generator | ₦150,000+ | ₦10,000 (grid) | ₦140,000+ |
For a detailed breakdown, see our full analysis: inverter FAQ.
HOW MANY BATTERIES FOR 2.4KVA INVERTER FAQ
Can I use just 1 battery with a 2.4kVA inverter?
No. A single 12V battery cannot power a 2.4kVA inverter. The minimum voltage requirement is 24V, requiring exactly two 12V batteries connected in series.
Can I use 4 batteries with a 2.4kVA inverter?
Yes, but not in series. Four batteries in series creates 48V which can damage a 24V inverter. For longer backup with 4 batteries, wire them as two 12V+12V series pairs, then connect the pairs in parallel to stay at 24V with doubled amp-hour capacity. Ensure your inverter charger can handle the larger bank, or recharge time will be slower.
How long will 2 batteries last on a 2.4kVA inverter?
Two 200Ah batteries at 24V provide roughly 8 hours for a typical Nigerian household (400W), over 16 hours for light loads (200W), and about 5 hours with a small refrigerator added (600W). Runtime depends entirely on your load discipline.
Can I run a fridge on a 2.4kVA inverter?
Only with the pure sine wave hybrid model. Modified sine wave is not recommended for refrigerators and other compressor loads. If you want to run a refrigerator safely, choose the pure sine wave hybrid model. The hybrid can run small refrigerators (150 to 200L). Read more: Can an inverter carry a fridge?
What is the payback period for a 2.4kVA inverter system?
With petrol around ₦1,250 to ₦1,450+/litre (April 2026) and monthly generator savings of ₦100,000+, the complete system pays for itself in 10 to 13 months depending on generator hours, local fuel prices, and load discipline.
Is the 2.4kVA inverter solar-ready?
The Mercury 2.4kVA Hybrid Solar model has a built-in MPPT solar charge controller. You can add solar panels for even greater savings. See our guide: How to connect solar panel to battery.
STOP WASTING MONEY ON GENERATOR FUEL
The Mercury 2.4kVA Complete Inverter System with 2 x 200Ah batteries gives you reliable backup. Professional installation and 12-month warranty included. Call 0703 745 1701 or chat on WhatsApp now.
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