5kVA is one of the most popular inverter sizes in Nigeria. It is big enough to run most of a flat, but it is not unlimited. Here is what it can really carry.
5kVA in watts
Inverters are rated in kVA. Multiply by about 0.8 to get watts: a 5kVA inverter carries about 4,000 W at once. Some 5kVA hybrid models are rated at 4,000 to 5,000 W; check the label. To keep it running cool and lasting long, plan to use no more than about 80% of that most of the time.
What it can usually run
- LED bulbs (10): about 100 W
- Fans (3): about 210 W
- TVs and decoders (2 sets): about 160 W
- Fridge: about 150 W (more when starting)
- Chest freezer: about 200 W (more when starting)
- Laptops, router and chargers: about 150 W
- Pumping machine (0.5 to 1 HP): about 750 W (much more when starting)
- Air conditioner, 1 HP: about 900 W
All of that together comes to about 2,600 W, so a 5kVA can carry a typical flat including one 1 HP air conditioner. A 1.5 HP AC (about 1,300 W) is usually fine too, as long as you are not also ironing or using a microwave.
What to avoid running together
- Pressing iron (about 1,200 W), microwave (about 1,000 W), electric kettle and water heaters draw a lot. Use them one at a time, ideally when the sun is out if you have solar.
- Two air conditioners plus a pumping machine at the same moment can trip it.
- Motors (pump, fridge, freezer, AC) draw two to three times their normal power for a moment when they start. Stagger them where you can.
How long will it last?
That depends on the batteries, not the inverter. As a guide, with a typical evening load of about 1,000 W:
- A 5 kWh lithium battery lasts roughly 4 hours.
- A 10 kWh lithium battery lasts roughly 8 hours.
Add an air conditioner and the hours drop quickly. Read lithium vs tubular inverter battery to choose the right type.
How many solar panels for a 5kVA?
Enough to refill your batteries each day. In Lagos, 1 kW of panels gives roughly 3 to 4 kWh on a typical day, so refilling a 10 kWh battery needs about 3 kW of panels, around 6 to 8 panels of 450 W, plus extra if you also run appliances during the day. The inverter's maximum solar input decides the upper limit.
Want a figure for your own home? Use the size estimator in our inverter and solar buying guide.
Get it sized and installed properly
A good installer checks your appliances and wiring before recommending a size. Get quotes from verified solar and inverter installers in Lagos on BetaWork, with your money held safely until the system works.
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