Which Lithium Battery for Your Inverter in Nigeria? 1.5kVA-10kVA Sizing Guide + kWh Price Ladder

Date: 2026-11-02

Most battery inquiries we receive from Nigeria do not start with amp-hours. They start with three things: the inverter size in kVA, the battery size in kWh, and the price. A typical request reads like this: a 2,200W inverter-solar system for a home, asking for a 400Ah to 600Ah lithium battery bank. Another asks for catalogues and prices for 1.5kWh, 3kWh and 5kWh batteries. That is the right way to buy — but only if the kVA, the kWh and the price are all tied to an actual load calculation. This guide shows Nigerian buyers and dealers how to do that calculation, how to read the price ladder honestly, and what to check before paying for any inverter battery, from any supplier.

Step 1: List the Loads the Battery Must Carry

An inverter battery does not power “the house”. It powers a specific list of appliances for a specific number of hours. Write the list first, with realistic wattages:

Appliance	Typical draw	Notes
LED bulbs (per room)	5–15W each	Cheap to run; rarely the problem
Ceiling / standing fan	60–100W	Runs many hours — hours matter more than watts
TV + decoder	80–150W	Evening load, usually 4–6 hours
Fridge (inverter type)	100–200W average	Compressor starts in surges; keep on the essential list only if sized for it
Laptop + phones + router	60–120W	The work-from-home core load
Freezer	150–250W average	Often the appliance that pushes a system up one size
Air conditioner (1–1.5HP inverter type)	800–1,200W	Possible on lithium, but it decides the battery size almost by itself
Pumping machine / borehole pump	750–1,500W	High start surge; many buyers run it only when the sun is up or the grid is on

Add up the watts of everything that must run at the same time. That total is your peak load in watts. Then decide how many hours of backup you actually need — for most Lagos and Abuja homes, the honest figure is the length of the usual outage window plus a margin, not “all night, everything on”.

Step 2: Convert Load × Hours into kWh

The working formula is simple:

Usable energy needed (kWh) = average load (kW) × backup hours

Example: lights, two fans, TV, fridge and laptops average about 600W. For 6 hours of backup you need 0.6 × 6 = 3.6kWh of usable energy. Now the chemistry matters:

LiFePO4 (lithium): you can use about 90% of the nameplate capacity. A 5.12kWh battery (51.2V 100Ah) gives roughly 4.6kWh usable — enough for the example above with margin.
Tubular lead-acid: you should only use about 50% of nameplate if you want the batteries to survive. A 12V 200Ah tubular battery holds 2.4kWh on paper but delivers only about 1.2kWh usable — which is why a “200Ah” tubular bank so often disappoints next to a smaller lithium unit.

This one conversion explains most of the confusion in the Nigerian market: buyers compare a 200Ah tubular battery with a 100Ah lithium battery as if the numbers were equal. They are not — compare usable kWh, not Ah.

Step 3: Match the Battery to the Inverter Size (kVA Table)

The inverter’s kVA rating tells you the maximum power it can deliver at once; the battery must be able to supply that power and hold enough energy for your backup hours. The pairings Nigerian buyers most commonly build are:

Inverter	Battery platform	Typical battery size	Usable energy	Realistic use
1.5kVA	24V	25.6V 100Ah	≈2.3kWh	Lights, fans, TV, laptops for an evening outage
2.2–3.5kVA	48V	51.2V 100Ah	≈4.6kWh	Full essential load incl. fridge, 5–7 hours
5kVA	48V	51.2V 200Ah (or 2 × 100Ah in parallel)	≈9.2kWh	Essential load + freezer, or short AC runs
7.5–10kVA	48V	51.2V 300Ah class (15kWh) or stacked wall units	≈13.8kWh+	Larger homes, small offices, shops

Two checks separate a working system from a warranty argument:

Discharge current. A 5kVA inverter at full load pulls roughly 100A from a 51.2V battery. The battery’s BMS must be rated at or above that as a continuous current — a 100Ah battery with a 100A BMS is a match; one with a 50A BMS will trip or throttle. Always ask for the BMS continuous discharge rating in writing.
Charging side. If the battery must recharge inside a short grid window, check the inverter’s charge current and the battery’s accepted charge rate together. A big battery on a small charger is a half-empty battery at the next outage.

Lithium vs Tubular: The Replacement Account

Tubular batteries are cheaper to buy and more expensive to own. Run the account per usable kWh delivered over the system’s life:

Tubular: roughly 600–800 cycles at 50% depth of discharge before capacity falls away — in daily Nigerian outage service, that is often 2–3 years per bank, then a full replacement, plus distilled-water maintenance and the disposal problem.
LiFePO4: 4,000+ cycles at 80–90% depth of discharge is the standard design class for quality cells — a decade-class service life at one cycle per day, no watering, and roughly half the weight for the same usable energy.

Divide the purchase price by (usable kWh × realistic cycle life) and the lithium option usually wins on cost per delivered kWh even when its shelf price is two to three times higher. If a lithium quote looks cheaper than tubular per kWh, treat that as a warning sign, not a bargain — the difference is almost always in cell grade, real capacity, or the BMS.

How the Nigeria Price Ladder Actually Works

Local retail listings in 2026 put a 2.5kWh-class lithium battery from around ₦580,000, and 5kWh units in a wide band from roughly ₦995,000 to ₦2,148,000 depending on brand and specification (figures from Nigerian solar retailers’ published price guides — use them as a market reference, not as any supplier’s quote). The ladder is wide because the products inside it are not the same. Five things move a unit up or down the ladder:

Real capacity. Nameplate kWh vs delivered kWh. Ask how capacity is verified — a discharge test report format, or at minimum the cell model and count behind the rating.
Cell grade and origin. Grade A cells from known makers cost more than mixed or reclaimed cells, and the gap shows up in year two, not month two.
BMS capability. Continuous current rating, and whether the BMS communicates with common inverters (CAN/RS485) or is a basic protection-only board.
Warranty terms that can actually be claimed. Who honours it in Nigeria, what it covers (cells only, or the full unit), and what evidence is required.
Where the price is quoted. A Lagos retail price includes sea freight, SONCAP and clearing, importer margin and local stock risk. An EXW China price excludes all of that. Comparing the two numbers directly is the most common pricing mistake Nigerian importers make — compare landed cost to landed cost.

LJY Energy supplies Nigerian distributors, installers and dealers on an EXW/FOB basis and quotes per specification — battery size, BMS rating and quantity — rather than publishing retail prices. Send the sizing result from Steps 1–3 (your load list, inverter model and target kWh) and the quote you get back will be for exactly that build, with the landed-cost items listed separately so you can compare it against local shelf prices honestly.

Shipping and Compliance Notes for Lagos-Bound Orders

Battery shipments to Nigeria typically land at Apapa or Tin Can Island ports in Lagos — the destination port Nigerian buyers name most often in our inquiry records. Lithium batteries ship as UN3480 dangerous goods, and Nigerian imports require SONCAP certification through an accredited route. Confirm with your clearing agent which documents your shipment needs before the goods leave China: the SONCAP product certificate route, the Form M, and the battery’s UN38.3 test summary are the items that most often delay clearance when they are arranged late. Our Nigeria supplier guide covers the import side in more detail, and the Africa import compliance guide compares requirements across Nigeria, Kenya, South Africa and Ghana.

Quick Sizing Checklist (Send This With Your Inquiry)

Inverter brand, model and kVA rating (and whether it is 12V, 24V or 48V)
Your essential load list with watts, and the backup hours you need
Target battery size in kWh (or the result of the Step 2 formula)
Whether the BMS must communicate with your inverter, and by which protocol
Quantity — samples, first order, and expected regular volume
Destination port and who handles clearing on your side

Send your sizing details for a specification-based quote →

FAQ

Can a 1.5kVA inverter run a fridge?

Yes, if the fridge is a modern inverter type and the battery can supply the compressor’s start surge — a 25.6V 100Ah LiFePO4 battery with a 100A-class BMS handles this comfortably. Older, larger fridges are the borderline case; check the fridge’s rated watts and start current before promising.

Why is my 200Ah tubular bank weaker than a 100Ah lithium battery?

Usable energy. At a safe 50% depth of discharge the 200Ah tubular delivers about 1.2kWh; a 51.2V 100Ah lithium battery delivers about 4.6kWh usable. Voltage and discharge depth, not the Ah number alone, decide what you can run.

How many solar panels do I need to charge a 5kWh battery?

As a planning figure, replacing 4.6kWh of daily use needs roughly 1.2–1.6kWp of panels in Nigerian sun conditions after system losses — but panel sizing follows your daytime load and recharge window. Send your panel count and inverter model with your inquiry and we will flag any mismatch.

Do you sell single units to homeowners?

LJY Energy is a B2B supplier working with distributors, installers and dealers; our Nigeria pricing is structured for trade quantities. Homeowners get the most value buying through a local installer who can also commission the system — the sizing method in this guide works the same either way.