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Smart Lock Energy Efficiency and Standby Power Guide

Guide to smart lock energy efficiency and standby power consumption for UK homes covering battery chemistry, consumption by protocol, solar charging options, and reducing environmental impact.

Smart Lock Power Consumption by Protocol Type

Guide to smart lock energy efficiency and standby power consumption for UK homes covering battery chemistry, consumption by protocol, solar charging options, and reducing environmental impact.

Reducing Smart Lock Energy Consumption

Guide to smart lock energy efficiency and standby power consumption for UK homes covering battery chemistry, consumption by protocol, solar charging options, and reducing environmental impact.

Specifications and Comparison

Lock Protocol Daily Standby Motor per Cycle Battery Life Annual Battery Cost
WiFi (direct) 30-50mAh 80-150mAh 3-6 months £12-£24 (8-12 AA)
Bluetooth (BLE) 15-25mAh 70-120mAh 6-12 months £6-£12 (4-6 AA)
Zigbee 8-15mAh 60-100mAh 8-12 months £4-£8 (4 AA)
Z-Wave 5-10mAh 60-100mAh 12-18 months £3-£6 (4 AA lithium)
Bluetooth + solar 15-25mAh 70-120mAh 6-12 months (with supplement) £2-£4 (solar supplement)

FAQ

Which smart lock type uses the least power?
Z-Wave locks use the least power (5-10mAh daily standby) and provide the longest battery life (12-18 months). Zigbee is slightly higher but still efficient.
Can I use rechargeable batteries in my smart lock?
Most manufacturers recommend against rechargeable AAs (1.2V vs 1.5V) for reliable operation. However high-quality NiMH (eneloop Pro) at 1.25V work in many locks.
Does solar charging work for UK smart locks?
Yes for south-facing doors. Nuki Solar Panel provides trickle charging. Effective March-September with 3-4 hours direct sunlight. For more information see our Smart Lock Elderly and Disability Access Guide.

Last updated: 2026-05-31.

External Resources

For further information consult authority guidelines at the Royal Society for the Prevention of Accidents.