How to Power Your Entire House with Solar in Nigeria 2026: My Real kVA Calculator + Enugu Price Breakdown*

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NEPA tariff went up again June 1. Generator fuel is ₦1,100/litre. These numbers are current for today._

“How many kVA do I need to power my whole house?”

I get this WhatsApp message 20 times a week. Last week, a man in Trans Ekulu sent me his NEPA bill: ₦187,000 for May. He has 3 ACs, 2 freezers, pumping machine, and 7 bedrooms. An installer quoted him “10KVA solar will do”.

*He would have wasted ₦6.8M.*

I went to his house. Did load test with clamp meter. Real need: 18KVA. If he bought 10KVA, his ACs would trip the system every afternoon and he’d call solar a scam.

After 47 full-house installs in Enugu, here’s the truth: *“Entire house” means different things.* 3-bedroom bungalow ≠ 5-bedroom duplex. Your installer must do math, not guess.

*I’ll show you the exact math I use, with 2026 Enugu prices. No copy-paste.*

*Step 1: Stop Using kVA. Use kWh. This Is Why 90% of Quotes Fail*

kVA = power at one moment. kWh = power over time.

*Example:* Your 1.5HP AC is 1.2kW. If it runs 8 hours = 9.6kWh/day.

10KVA inverter can RUN the AC. But if your battery is only 5kWh, the AC kills the battery in 30 mins.

*June 2026 case:* Client in New Haven bought 15KVA inverter + 5kWh battery because Facebook vendor said “it will power everything”. System shuts down 7pm daily. He can run AC, but not for long. ₦4.2M wasted.

*Formula I use:*

`Total kWh/day = Sum of (Appliance Watts x Hours Used) / 1000`

`Battery Size = Total kWh/day x 1.3 for losses x Days of autonomy`

`Inverter Size = Peak load at once x 1.25 safety factor`

*Step 2: Real Enugu House Load Calculator - 3 Examples*

I measured these 3 houses June 2026 with my clamp meter. Use them to estimate yours:

*House 1: 3-Bedroom Bungalow, Coal Camp*

NEPA bill: ₦65k/month. Gen: ₦40k/month.

Appliance Watts Hours/Day kWh/Day

1.5HP AC x2 2400W 6h 14.4

Fridge + Freezer 400W 24h 9.6

Pumping Machine 1HP 750W 1h 0.75

Lights + Fans + TV 600W 8h 4.8

**Total** **29.55 kWh/day**

*Peak load if everything starts at once:* 2400 + 400 + 750 + 600 = 4.15KW. Add 25% surge = *5.2KVA minimum inverter.*

*Battery math:* 29.55 kWh x 1.3 = 38.4kWh. For 1 day backup = *40kWh battery bank.*

*2026 System Cost:*

- Inverter 6KVA Growatt: ₦750k

- Battery 40kWh Felicity: ₦8.8M

- Panels 9KW Jinko: ₦1.65M

- Installation: ₦550k

- *Total: ₦11.79M* | Payback: 3.1 years vs ₦105k/month NEPA+gen

*House 2: 5-Bedroom Duplex, G.R.A*

NEPA bill: ₦140k/month. Gen: ₦110k/month.

Appliance Watts Hours/Day kWh/Day

1.5HP AC x4 4800W 7h 33.6

2HP AC x1 1800W 5h 9.0

3 Freezers 600W 24h 14.4

Pumping 2HP 1500W 1.5h 2.25

Lights/Fans/TVs 1200W 10h 12.0

**Total** **71.25 kWh/day**

*Peak load:* 4.8+1.8+0.6+1.5+1.2 = 9.9KW. Add 25% = *12.4KVA minimum.* Use 15KVA inverter.

*Battery:* 71.25 x 1.3 = 92.6kWh. *100kWh battery for 1 day backup.*

*2026 System Cost:*

- Inverter 15KVA Deye: ₦2.2M

- Battery 100kWh Felicity: ₦22M

- Panels 22KW Jinko: ₦4.03M

- Installation: ₦1.1M

- *Total: ₦29.33M* | Payback: 4.7 years vs ₦250k/month

*House 3: 2-Bedroom Flat, Abakpa*

NEPA bill: ₦28k/month. Gen: ₦22k/month.

Appliance Watts Hours/Day kWh/Day

1HP AC x1 900W 5h 4.5

Fridge 150W 24h 3.6

TV + Fans + Lights 400W 6h 2.4

**Total** **10.5 kWh/day**

*Peak:* 0.9+0.15+0.4 = 1.45KW. *Use 3KVA inverter minimum.* 5KVA better for future.

*Battery:* 10.5 x 1.3 = 13.65kWh. *15kWh battery.*

*2026 System Cost:*

- Inverter 5KVA Growatt: ₦650k

- Battery 15kWh Blue Carbon: ₦2.94M

- Panels 3.3KW Jinko: ₦605k

- Installation: ₦300k

- *Total: ₦4.495M* | Payback: 7.4 years. This house should maybe do “AC only” system for ₦2.8M instead.

*Step 3: The 4 Mistakes That Make "Whole House Solar" Fail*

I fixed these June 2026 alone:

1. *“Vendor said 10KVA means 10 hours”* → No. 10KVA with 5kWh battery = 30 mins if you load it to 10KVA. Client in Awkunanaw learned hard way.

2. *Ignoring surge power* → Fridge compressor start = 3x watts for 2 seconds. Pumping machine = 4x. If inverter is too small, it trips. Always +25% headroom.

3. *No energy audit* → Installer guesses. I use clamp meter on your DB for 24hrs. ₦15k service. Saves you ₦2M mistake.

4. *“Use solar in day, NEPA at night”* → NEPA is 90V at night in Enugu. Can’t charge battery. You need enough battery for full night. Half systems fail here.

*Step 4: Can You Really Go 100% Off-Grid in Enugu? 2026 Truth*

Month Avg Sun Hours Enugu Can 1KW Panel Make Will You Use Gen?

**Dec-Mar** 5.5h 5.5kWh/day No. Best months

**Apr-Jun** 4.2h 4.2kWh/day Maybe 3 days/month

**Jul-Sep** 3.1h 3.1kWh/day Yes, 8 days/month if battery small

**Oct-Nov** 4.8h 4.8kWh/day No

*My rule:* If you want 100% off-grid, size battery for 2 rainy days. For House 2 above: 71kWh/day x 2 = 142kWh battery = ₦31M just for battery. Most clients do 1-day backup + keep gen for rainy week.

*Real off-grid client:* Dr. Eze, Independence Layout. 120kWh battery, 30KW panels. ₦41M system. Hasn’t used gen since Jan 2026. But he can afford it.

*Step 5: My 2026 “Whole House” Package Prices - Enugu Only*

Package Runs What Inverter + Battery Panels Total June 2026

**Essential 5KVA** 1 AC, Fridge, Lights, TV 5KVA + 15kWh 3.3KW **₦4.5M**

**Family 10KVA** 3 ACs, 2 Freezers, Pump 10KVA + 30kWh 6.6KW **₦9.8M**

**Duplex 15KVA** 5 ACs, 3 Freezers, 2 Pumps 15KVA + 60kWh 13.2KW **₦19.2M**

**Mansion 30KVA** Everything + Gate + Pool 30KVA + 120kWh 26.4KW **₦41M**

*What’s included:* Growatt/Deye inverter, Felicity/Blue Carbon battery, Jinko panels, rails, DC SPD, installation, 2-year workmanship warranty.

*Not included:* Changeover switch ₦85k, additional DB ₦60k, transport outside Enugu.

*Final Check: Do This Before You Pay Anyone*

1. *Take photo of your NEPA bill* + list all appliances. WhatsApp me 0803 XXX XXXX. I’ll tell you real kVA free in 10 mins.

2. *Ask installer:* “Show me your load calc sheet.” If he says “we’ll know when we start”, run.

3. *Demand battery spec sheet:* Cycles, DoD, warranty. Felicity gives 6000 cycles. If vendor can’t show, it’s fake.

4. *Visit 1 old client site.* If installer says “privacy”, he’s hiding something. My clients in G.R.A allow visits.

*Whole house solar works.* My own house in Trans Ekulu has been 100% solar since Nov 2024. ₦0 NEPA bill. But I sized it right.

*Don’t let vendor size it wrong.* You’ll blame solar. Solar doesn’t fail. Bad math fails.

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*About the Author:* Ekeson Collins, CEO Ekeson Energy Solution. COREN http://R.Eng. Installed 47 full-house systems. Office: 12 Ogui Road, Enugu. My 15KVA home system is open for inspection.

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