How Many 48V Batteries for a 5kVA Inverter? (2025 Zimbabwe Guide)
With frequent power outages in Zimbabwe, a solar system is essential. A common question we hear is, "How many 48V batteries do I need for a 5000W inverter?" This guide provides the clear answers you need to build a reliable power backup system.

Your Quick Guide to a 5kVA System
Estimate for a continuous average load of 1000W. Actual backup time varies with usage.
Understanding the Components
A 5kVA inverter is a powerful device that converts DC electricity from your batteries into usable AC power. Its 5000W rating means it can handle multiple appliances simultaneously, making it a popular choice for Zimbabwean households seeking reliable energy.
For a 5000W inverter, a 48V battery system is the most efficient choice. Higher voltage systems require less electrical current to deliver the same amount of power, which reduces energy lost as heat and allows for thinner, less expensive wiring. A standard 48V 100Ah lithium battery stores about 4,800 watt-hours (Wh) of energy.
Making the Right Choice
Lead-Acid: Cheaper upfront but have a shorter lifespan (2-4 years) and can only be safely discharged to 50% of their capacity, giving you less usable energy.
Lithium-Ion: More expensive initially but are the recommended choice. They last much longer (10-15 years), are more efficient, and allow for deep discharge (80-100%), providing significantly more usable energy and better long-term value.
Frequently Asked Questions
For an average load of 1000W, you need one 48V 100Ah lithium battery for 4-5 hours of backup. For 8-10 hours, you will need two batteries. Your specific needs will depend on the appliances you run.
In the context of home solar systems, kW (kilowatts) and kVA (kilovolt-amperes) are often used interchangeably to describe the inverter's power rating. A 5kW inverter is the same as a 5kVA inverter for most residential purposes.
Lithium-ion batteries are highly recommended for a 5kVA system due to their long lifespan, high efficiency, and deep discharge capability, which provides more reliable power and better value over time.
Choosing the right number of batteries is critical. For expert advice on system design tailored to your home or business, contact Sona Solar Zimbabwe today. We can help you achieve energy independence with a reliable, efficient solar solution.

Sona Solar Zimbabwe
Sona Solar Zimbabwe
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Harare, Zimbabwe.
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