Key Takeaway
Repeated load shedding cycles — particularly voltage surges when power is restored — damage gate motor control boards and batteries. A correctly specified battery backup system prevents this damage and keeps your gate operational during outages.
How Load Shedding Damages Johannesburg Gate Motors
Most Johannesburg homeowners understand that their gate motor does not function during load shedding. What is less understood is that the damage caused by load shedding is not primarily the absence of power — it is the surge of current that occurs when Eskom restores power after an outage.
This return surge passes through the gate motor's control board. Over multiple cycles — and with Johannesburg experiencing multiple stages of load shedding per day across extended periods — the cumulative effect destroys control boards, capacitors and the internal battery charge circuits of affected motors.
What is Gate Motor Battery Backup?
How does battery backup work with a Centurion gate motor?
Battery backup for a Centurion gate motor involves installing an external sealed lead-acid or lithium battery with a dedicated charge controller. The charge controller maintains the battery at optimal charge during normal operation and switches the motor to battery power seamlessly when grid power is interrupted — before the motor experiences the drop in voltage that triggers a fault.
When power is restored, the charge controller buffers the return surge before allowing it to reach the motor's control board. This protection is the primary benefit of a correctly installed battery backup system — operating the gate during load shedding is the secondary benefit.
How Long Does a Battery Backup Last During Load Shedding?
A correctly specified 12V 7Ah sealed lead-acid battery provides approximately 40 to 60 gate motor cycles during a single load shedding stage. A 12V 18Ah battery provides 100 or more cycles. For estate properties with high-traffic gates, a larger capacity battery is recommended.
- Standard residential gate (low traffic): 12V 7Ah — 40–60 cycles per charge
- Residential gate with high daily usage: 12V 18Ah — 100+ cycles per charge
- Estate complex or commercial gate: 12V 26Ah or dual-battery configuration
How Often Should Gate Motor Batteries Be Replaced?
Sealed lead-acid batteries in high-load-shedding areas of Johannesburg should be replaced every 18 to 24 months. A battery that has been through multiple deep discharge cycles — where power is not restored quickly enough to recharge before the next outage — degrades significantly faster. A degraded battery provides fewer cycles and offers reduced surge protection.
If your gate motor is cycling slowly, not reaching full open position or struggling on the return stroke during load shedding, the battery is likely degraded and requires replacement rather than the motor itself.
Gate Motor Battery Backup Installation Near Me
AriKai Secure installs battery backup systems for all Centurion and major gate motor brands across Johannesburg, Randburg and Fourways. Same-day callouts available.
Gate Automation Services Call +27 82 934 5287