Backup Power for Offices and Shops in Pretoria
When the power cuts, your till, card machine and network stay up.
Inverter and battery systems for Pretoria retailers and offices, sized around the equipment you need to keep trading.
What matters for an office or shop
For a shop or office, the first question is what actually stops you trading the moment the grid drops. Card machines and tills, the network they connect through, and the computers your staff work on are usually top of the list.
Lighting and a display fridge or freezer often matter next, together with any CCTV and alarm that protect the premises. Heavy loads such as air conditioners, kettles and microwaves draw far more than the rest combined and are usually left off the battery or sized in deliberately.
If you rent the premises, the landlord or managing agent may need to approve the installation before work starts. Watt Electrical Energy Solutions can supply the proposed system details for that approval.
What can stay on
A starting list of the loads usually worth backing up. Final sizing is confirmed on site.
- Tills and card machines
- Computers and point-of-sale terminals
- Lights and the Wi-Fi router
- A display fridge or freezer
- CCTV cameras, recorder and the alarm panel
- Selected plugs for chargers and printers
How it works
Cut the mains
A backup power system keeps your essential circuits running when the grid drops. Try the simulation below to see how power flows from the mains, through the inverter and battery, to the circuits you choose to back up.
- Lights
- Fridge
- Router
- CCTV
- PCs
Normal supply: mains power passes through the inverter to your essential circuits.
This is a visual simulation only and does not control physical electrical equipment.
Sizing estimate
How big a system do you need?
Wattages are typical estimates. Actual equipment consumption and the final system specification must be confirmed during a site assessment.
LED lights
10 W each
Fridge or freezer
150 W each
Wi-Fi router and fibre box
20 W each
CCTV cameras
8 W each
CCTV recorder
25 W each
Desktop PC with monitor
150 W each
TV or screen
100 W each
Split aircon, 12,000 BTU
1100 W each
Microwave
1200 W each
Kettle
2000 W each
Connected load
1027 W
Suggested inverter
3 kVA
Estimated battery
5.12 kWh
Our smallest system is 3 kVA with a 2.56 kWh battery.
Inverter size allows for start-up surges from motors like fridges. Battery size allows for usable capacity and conversion losses. Geysers and stoves are best left off the battery. This is a starting figure, not a quote.
This calculator is a preliminary sizing aid and does not replace a site assessment, inverter compatibility checks, battery discharge limits, surge assessment or final electrical design.
The process
How your backup power installation works
- 1
Walk-through
Walk the premises and list exactly what stops trading the moment the power drops.
- 2
Decide what stays on
Agree which tills, card machines, computers, lights and security gear must keep running.
- 3
Written quote
Receive an itemised quotation for the inverter, battery and essential circuits.
- 4
Landlord approval
Where you rent, arrange the landlord or managing agent's approval using the system details we provide.
- 5
Installation
Install around your trading hours where practical and label every backed-up circuit.
- 6
Test and handover
With you present, cut the mains and confirm each chosen circuit keeps running.
FAQs
Office & Shop Backup Power Pretoria — FAQs
Get a quote
Get a backup power installation quote
Tell us what you need to keep running and how long for. We'll come back with a clear, itemised quotation for your Pretoria premises.