Load shedding disrupts South African schools on multiple levels: computer labs go dark, security cameras stop recording, electric gates fail, and administration grinds to a halt. While Eskom's grid challenges continue, schools need practical backup solutions.
Understanding Your Power Needs
Before investing in backup power, audit what you actually need to keep running:
Critical Systems (Must Stay On)
- Security cameras and alarm systems: 200-500W
- Electric gate and access control: 100-300W
- Server room / internet router: 200-500W
- Admin office computers (2-3): 300-600W
- Emergency lighting: 100-300W
Important Systems (Should Stay On)
- Computer lab (20-30 computers): 3,000-6,000W
- Photocopier/printer: 1,000-1,500W
- Staff room kettle and fridge: 2,000-3,000W
- Tuck shop fridge/freezer: 500-1,000W
Backup Power Options
UPS (Uninterruptible Power Supply)
Best for: servers, computers, security systems. Provides instant switchover with no gap.
- Small UPS (600-1000VA): R1,000-R3,000. Protects 1-2 computers for 15-30 minutes. Enough for proper shutdown.
- Medium UPS (2000-3000VA): R5,000-R10,000. Powers a small server room for 1-2 hours.
- Large online UPS (5000VA+): R15,000-R40,000. Powers critical systems for 2-4 hours.
Inverter + Battery System
Best for: general school operations during 2-4 hour load shedding stages.
- 3kW system: R20,000-R40,000. Powers lights, computers, and security.
- 5kW system: R40,000-R70,000. Powers a small computer lab and admin block.
- 10kW+ system: R80,000-R150,000. Powers most school operations.
Solar Panels
Best for: long-term cost reduction combined with battery backup.
- A 5kW solar system with batteries costs R80,000-R150,000 installed
- Reduces grid electricity costs by 40-70%
- Payback period of 4-7 years
- Available tax incentives (Section 12B) for educational institutions
- Roof assessment required to determine suitability
Diesel Generator
Best for: extended outages and full campus backup.
- 15kVA: R30,000-R60,000. Powers admin and security.
- 60kVA: R80,000-R150,000. Powers most of a school campus.
- Fuel cost: approximately R200-R500 per hour of operation.
- Requires servicing every 200-500 hours.
- Noisy - placement matters.
Recommendations by School Size
- Small school (under 300 learners): 3kW inverter + battery for admin and security. Budget R25,000-R40,000.
- Medium school (300-800 learners): 5-8kW inverter + battery + solar panels. Budget R60,000-R120,000.
- Large school (800+ learners): 10kW+ hybrid solar system + diesel generator backup. Budget R150,000-R300,000.
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