AVR Buying Guide: Protecting Fridges and ACs from Voltage Swings

Automatic Voltage Regulators (AVRs) keep output near 220 V when the grid or generator swings between 170–260 V — common across Nigeria. They differ from simple surge strips.

What an AVR does

It continuously boosts or bucks voltage so connected appliances see stable input. Refrigerators, freezers, and air conditioners have compressors that overheat and fail on sustained low voltage.

Sizing by appliance

• Fridge / freezer: 500 VA–1000 VA dedicated AVR
• 1–1.5 ton AC: 2000–3000 VA servo or relay AVR
• TV + decoder + soundbar: 800–1000 VA surge strip may suffice; AVR for village feeds
• Whole room: Central stabilizer sized to combined running load

AVR vs surge protector

Surge protectors clamp brief spikes — they do not fix chronic low voltage. AVRs handle sustained under-voltage that browns out motors. Use both layers: AVR for white goods, quality surge strip for entertainment gear.

Installation tips

Never daisy-chain multiple AVRs. Ensure ventilation — relay types hum and generate heat. Replace units with warning lights that stay on after storms. Agu Brothers stocks brand-new AVRs and power accessories with warranty.