Backup power guide: inverters, batteries and generators

Start with what you want to run

Before choosing any equipment, list the devices you need during a power cut and their wattage: lights, TV, router, laptop, fridge, a till or POS machine. Add up what will run at the same time. This total guides the inverter size.

Inverters

An inverter turns battery power into the mains electricity your devices use, and switches over automatically when the power goes. Choose pure sine wave for TVs, laptops, fridges and other sensitive electronics. Common sizes are 1kVA for a few lights and a TV, and 3kVA or more for larger homes and shops.

Batteries: lithium or gel

• Lithium (LiFePO4): lighter, more charge cycles and more of the capacity is usable. Higher price, lower long-term cost for daily use.
• Gel deep cycle: sealed and maintenance free, lower upfront cost, heavier. Good for occasional outages.

Battery capacity (Ah) decides how long your backup lasts. A 24V inverter usually uses two 12V batteries in series.

Generators

A petrol generator suits long outages or heavy loads such as pumps and workshop tools. Always run it outdoors in a well-ventilated place, never indoors or in a closed garage.

Solar

Adding solar panels to an inverter and battery setup lets you recharge without the grid. For small needs, a solar lamp with phone charging is a simple start.

Ask us

Send us your device list on WhatsApp or visit our shop on Luthuli Avenue, and we will suggest a setup that fits your needs and budget.