Inverter for CCTV in Nigeria

WHY AN INVERTER FOR CCTV IN NIGERIA IS EASIER TO SIZE THAN YOU THINK

When sizing an inverter for freezers, water pumps, or air conditioners, you have to account for motor startup surge, which can be three to seven times the running wattage. A single 200-litre chest freezer that draws 150W running can surge to over 1,000W at startup. That is why our inverter for fridge guide spends so much time on surge headroom.

CCTV is completely different. Cameras, DVRs, and NVRs are all electronic loads powered by switching power supplies. They have no motors. They have no compressors. There is no startup surge worth sizing for.

The rule for CCTV: Size your inverter to 125% of your total running watts. That is all. No surge multiplier. No 3x or 5x buffer. If your system draws 120W running, any inverter rated above 150VA will handle it. A 1kVA inverter running a 120W CCTV system is not even working at 15% of its capacity.

This makes CCTV one of the easiest loads to back up. The challenge is not the inverter size, it is making sure you use the right type of inverter and sizing the battery correctly for Nigerian outage reality.

MODIFIED SINE WAVE INVERTERS CAN DAMAGE CCTV EQUIPMENT

Many cheap inverters sold in Nigerian markets produce modified sine wave output. For simple resistive loads like fans and bulbs, this works fine. For CCTV, it is a serious problem. The four ways modified sine wave damages CCTV systems:

• Camera flickering and dropouts: The stepped waveform destabilises camera power supplies, causing cameras to blink, flicker, or drop to black even when the inverter is running normally.
• DVR hard drive corruption: Dirty or unstable inverter output can stress the DVR power supply and cause sudden reboots during active disk writes. The result is missing footage, playback errors, and eventual hard drive failure.
• DVR and NVR overheating: Switching power supplies work harder to filter the dirty waveform, generating excess heat. Units fail months ahead of schedule.
• Interference in recordings: Harmonic distortion produces horizontal bars in video and audible buzzing from any audio-equipped cameras.

Always use a pure sine wave inverter for CCTV. Read our full pure sine wave vs modified sine wave guide for the technical details. Every Mercury inverter recommended in this article is pure sine wave.

CCTV EQUIPMENT POWER CONSUMPTION REFERENCE

Use this table to calculate your total system load. All figures are running watts, no startup surge multiplier needed for any of these devices.

Important note on IP cameras and NVRs: If your NVR has built-in PoE ports and powers your cameras directly, look at the NVR's total wattage specification. That single number covers both the NVR and all cameras. Do not add camera watts on top of it.

LOAD CALCULATIONS BY SYSTEM SIZE

These calculations use typical Nigerian installation configurations. All loads are running watts. Add 25% safety margin before sizing the inverter.

• 4-camera AHD system: 4 cameras at 8W + 4-channel DVR 15W + router 12W = 59W running, 74W with safety margin. Add a 22" monitor and total reaches around 90W. Minimum 500VA, recommended 1kVA pure sine wave.
• 8-camera AHD system (most common Nigerian business install): 8 cameras at 8W + 8-channel DVR 25W + HDD 8W + router 12W + monitor 30W = 139W running, 174W with safety margin. A 1kVA pure sine wave inverter handles this comfortably at under 20% capacity.
• 8-camera IP/PoE NVR system: 8-channel NVR with onboard PoE 80W + HDD 8W + router 12W + monitor 30W = 130W running, 163W with safety margin. The NVR figure already includes all camera power. Recommended 1kVA to 2.4kVA.
• 16-camera system: 16 cameras at 8W + 16-channel DVR 35W + HDD 8W + router 12W + monitor 30W = 213W running, 266W with safety margin. Recommended 2.4kVA for room to expand, or 3.5kVA Hybrid if solar is planned.

BATTERY SIZING FOR NIGERIAN OUTAGE REALITY

Standard office UPS units have small internal batteries designed for 20 to 30 minutes of runtime, enough to save your work and shut down a computer. In many Nigerian locations, especially outside reliable Band A supply, NEPA outages can run through the night or last for many hours, and a standard UPS is useless for CCTV under those conditions. You need to size your battery bank for the actual outage duration in your area. For most Nigerian locations, sizing for 12 to 16 hours of backup covers overnight periods and most commercial outage scenarios. To check your specific load, use our inverter battery runtime calculator.

The battery sizing formula:

• Formula: Backup Hours = (Voltage × Ah × Efficiency × DoD) ÷ Load Watts
• Inverter efficiency: 0.85 (typical transformer-based pure sine wave)
• DoD for tubular battery: 0.80 (Mercury Elite tubular plates tolerate deeper cycling)
• DoD for GEL/AGM battery: 0.50 (preserves cycle life for daily use)
• DoD for LiFePO4: 0.95 (lithium chemistry handles deep cycling safely)

Worked example for an 8-camera analog system at 120W on a 220Ah tubular battery: (12 × 220 × 0.85 × 0.80) ÷ 120 = approximately 15 hours theoretical runtime, around 12 to 13 hours real-world after accounting for battery age and ambient temperature. To extend battery cycle life on continuous-duty CCTV loads, see our battery lifespan guide.

For battery type selection, see which battery is best for an inverter. Tubular wins for continuous-duty CCTV applications because of its deeper cycling tolerance and longer service life. GEL works fine as well, particularly the Mercury Deep Cycle 200Ah GEL, but expect 50% DoD operation for the same cycle life.

MERCURY INVERTER FOR CCTV IN NIGERIA: PRODUCTS AND PRICES

Prices shown are verified on mercurydirect.com.ng as at May 2026 and may change with exchange rate, stock availability, and landing cost. Every unit listed is pure sine wave and safe for CCTV equipment. Same-day Lagos delivery, 48-hour nationwide, and 12-month warranty on standalone batteries and inverters.

Need to compare with general home loads first? See our 1.5kVA load guide for the smallest hybrid system. For the full inverter range and platform notes, the complete inverter buying guide covers everything from 1kVA up to 11kVA.

UPS VS INVERTER FOR CCTV: WHICH DO YOU NEED

Nigerians use "inverter" and "UPS" almost interchangeably, but they behave differently in ways that matter for CCTV.

Standard UPS: A UPS (Uninterruptible Power Supply) switches to its internal battery with near-zero delay. This is the best protection against DVR reboots and recording gaps during power transitions. However, a standard office UPS with its small internal 9Ah to 18Ah batteries provides only 18 to 24 minutes of runtime for a typical 4-camera system. In Nigerian outage conditions, that runs out long before NEPA returns.

Inverter with external battery: A home inverter paired with a large external deep cycle battery provides 8 to 24-plus hours of runtime. The switching delay (typically 10 to 50 milliseconds) can cause some DVRs to reboot when NEPA cuts. However, modern DVRs recover from this reboot in under 30 seconds and resume recording automatically. The long runtime advantage of the inverter plus battery setup makes it the practical choice for Nigerian NEPA conditions.

Bottom line for Nigeria: Use a pure sine wave inverter paired with a properly sized deep cycle battery. The occasional 30-second DVR reboot during a power cut is a minor inconvenience. Missing 8 to 20 hours of footage because your battery ran out is not.

Best practice for high-security sites: Use the Mercury inverter and tubular battery for long runtime, then place a small UPS between the inverter output and the DVR or NVR. The inverter gives you hours of backup, the UPS protects the recorder from rebooting during switchover. Banks, jewellery shops, pharmacies, and any site that cannot afford a single recording gap should specify this combination.

GENERATOR VS INVERTER: WHAT IT COSTS TO RUN CCTV ON PETROL

In April to May 2026, Nigerian petrol prices were broadly reported around ₦1,200 to ₦1,400 per litre depending on station and location, with NNPC retail stations in Lagos around the middle of that range. Fuel prices now move quickly, so the exact pump price may differ by location and week, but the direction is clear: every extra hour on generator is becoming more expensive.

A typical 1kVA petrol generator running CCTV burns 0.5 to 0.8 litres per hour. Running CCTV alone on a generator for 16 hours a day costs roughly ₦9,600 to ₦17,920 per day at current price ranges, before servicing, spark plugs, noise complaints, and the security risk of running a generator outside at night. Over a single month, that is ₦288,000 to ₦537,600 burned just on petrol.

The Mercury 1kVA + 220Ah Tubular bundle at ₦440,000 pays back its full cost in roughly six to eight weeks of generator petrol savings, then keeps saving for the next three to five years of battery life. The inverter still needs to be charged from NEPA, solar, or another energy source, but it removes the daily petrol burn that makes generator backup so expensive.

Band A electricity tariffs in Nigeria currently run between ₦206 and ₦225 per kWh depending on DisCo and feeder classification. At roughly ₦209.50 per kWh, recharging a CCTV battery bank from NEPA after a 16-hour overnight outage costs roughly ₦250 per day for a 4-camera load, ₦470 per day for an 8-camera load, and ₦830 per day for a 16-camera load. That is still a fraction of the petrol burn a generator would need to cover the same backup period.

ADDING SOLAR TO YOUR CCTV INVERTER SYSTEM

For remote properties, farms, estates, and any location where NEPA supply is extremely unreliable, solar panels paired with your inverter can remove most of the battery recharging burden. The Mercury 2.4kVA and 3.5kVA Hybrid MPPT models include a built-in MPPT solar charge controller. Add panels and batteries and your CCTV runs continuously regardless of NEPA. For panel selection and orientation, see our solar panels guide and solar panel to battery connection guide.

A 4-camera system at 60W draws approximately 1.44kWh per day. Two 300W monocrystalline solar panels in Nigerian sunlight, after typical losses from shading, roof angle, weather, cable, MPPT efficiency, and panel heat, usually generate around 2.2 to 3.0 kWh per day. That is comfortably more than a 4-camera CCTV load needs and tops up the battery during the day so the system survives back-to-back outages without grid charging. For stronger margin or to cover an 8-camera load, step up to two 420W or 450W panels.