Are you considering switching to solar or inverter power and wondering how many batteries a 7.5KVA inverter needs?
You’re not alone.
With constant power outages and rising fuel costs in Nigeria, more homes and businesses are turning to 7.5KVA inverters as a reliable and cost-effective backup power solution.
But to get the best performance, you must pair it with the right number and type of inverter batteries. Let’s break it down in simple, practical terms.
What is a 7.5KVA Inverter?
A 7.5KVA inverter converts DC power stored in batteries to AC power for your home or office appliances. One of the most popular options on the market today is the KM Smart Hybrid 7.5KVA inverter, which supports multiple charging sources: PHCN, generator, and solar panels.
This hybrid feature is ideal for Nigeria, where public power supply is unreliable.
So, How Many Batteries Do You Need for a 7.5KVA Inverter?
The number of batteries depends on two key factors:
-
The inverter’s voltage requirement (DC input voltage)
-
Your backup duration needs (how long you want power)
✅ Battery Configuration Based on Voltage
Most 7.5KVA inverters in Nigeria, including the KM Smart Hybrid Inverter, operate on 48V DC input.
This means you need four (4) 12V batteries connected in series to meet the inverter’s voltage requirement.
💡 Minimum setup = 4 x 12V batteries = 48V
✅ Battery Capacity: How Long Will They Last?
The next question is: What battery capacity should you use?
The most common options are:
-
12V/170Ah deep cycle batteries
- 12V/272Ah Sonnenbat lithium battery
-
48V lithium batteries (5kWh – 10kWh capacity)
🔋 Example 1: Deep Cycle Batteries
| Quantity | Battery Type | Total Backup Time (Estimate) | Price Range |
|---|---|---|---|
| 4 x 170Ah | 12V Deep Cycle | 6–12 hours (depending on load) | N1.2M – N1.5M |
12V/170Ah GEL WERBAT SOLAR BLOC HEAVY DUTY DEEP CYCLE INDUSTRIAL BATTERIES
This setup is affordable and suitable for homes that want to power:
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1 fridge
-
1 freezer
-
1 AC (1HP)
-
Lighting
-
TV, fans, router
🔋 Example 2: Lithium Batteries (LiFePO₄)
| Quantity | Battery Type | Backup Time | Price Range |
|---|---|---|---|
| 1 x 48V/5kWh | LiFePO₄ Battery | 5–10 hours | N1.3M – N1.8M |
| 2 x 48V/5kWh | LiFePO₄ Battery | 10–18 hours | N2.6M – N3.6M |
Lithium batteries last longer (10+ years), charge faster (with solar), and require less space. They are ideal for customers who want premium performance and minimal maintenance.
12V/272Ah SONNENBAT GNB Lifepo4 LITHIUM ION BATTERY
5KWh ( 51.2V/100Ah) OGM Powerwall LiFePo4 Lithium Battery
What Can a 7.5KVA Inverter + Batteries Power?
So, what can a 7.5KVA inverter carry? Here’s what a typical setup (7.5KVA inverter + 4 batteries) can run:
✅ In a Nigerian Home:
-
1 Freezer
-
1 Refrigerator
-
1 or 2 ACs (1HP)
-
Up to 10 LED bulbs
-
2 Televisions
-
Fan, Router, Decoder
-
Laptop, Phone chargers
-
Borehole pump (brief usage)
Common Issues with Selecting a battery for 7.5KVA Inverter
-
Undersized batteries = short backup time
-
Old batteries = quick voltage drop
-
Overloaded inverter = system trips off
Always match your inverter size to your actual power needs, and avoid buying used or “tokunbo” batteries with no warranty.
Why Choose the KM Smart Hybrid 7.5KVA Inverter?
7.5KVA (6.2KW)/48V PSC SOLAR(UK) /KM SMART HYBRID SOLAR INVERTER
The KM Smart Hybrid Inverter is built for the Nigerian environment.
Key Benefits:
-
Pure sine wave output (safe for electronics)
-
MPPT solar charge controller built-in
-
LCD Display for monitoring
-
Smart charging from NEPA, generator & solar
-
No noise, no fuel, no fumes
You can pair it seamlessly with either 12V/170Ah GEL WERBAT HEAVY DUTY DEEP CYCLE INDUSTRIAL BATTERIES, 12V/272Ah SONNENBAT GNB Lifepo4 LITHIUM ION BATTERY or 5KWh/48V OGM Powerwall LiFePo4 Lithium Battery, based on your budget.
7.5KVA Solar System Installation Breakdown in Nigeria (2025 Estimate)
| Item | Price Range (₦) |
|---|---|
| KM Smart Hybrid 7.5KVA Inverter | ₦575,000 |
| 4 x 12V/170Ah Deep Cycle Batteries | ₦900,000 – ₦1.2M |
| 48V/5kWh Lithium Battery | ₦1.2M – ₦1.5M (each) |
| Standard Installation | ₦100,000 – ₦200,000 |
💡 Prices vary depending on brand, installation quality, and region (Lagos, Abuja, Port Harcourt, etc.)
Final Tips Before You Buy
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Don’t buy an inverter alone, battery quality determines system performance.
-
Avoid cheap or unknown battery brands.
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Insist on at least 1-year warranty for batteries. PSC Solar (UK) offers 12 months warranty on their products.
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Always buy from reputable solar companies with after-sales support. PSC Solar (UK) offer quality after- sales support and can be contacted Monday to Friday, 8AM- 6PM
Ready to Power Your Home or Business?
At PSC Solar (UK), we offer reliable 7.5KVA KM Smart Hybrid Inverters with long-lasting battery options and professional installation anywhere in Nigeria.
Call or WhatsApp us now: +234 812 085 5444, +234 808 955 2800
Visit: www.pscsolaruk.com
Nationwide Delivery & Installation Available
FAQs: How Many Batteries for 7.5KVA Inverter
Can I use 2 batteries with a 7.5KVA inverter?
No. Most 7.5KVA inverters require 48V, which needs 4 x 12V batteries minimum.
How long will 4 batteries last?
It depends on your load, but expect 6 to 12 hours for average usage.
Can I upgrade from tubular to lithium later?
Yes. Many smart inverters like the KM Smart Hybrid are compatible with both battery types.
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