Electrician in Sea Point

Registered Electricians : Domestic | Guest Houses | Hotels | Restaurants | Commercial : 071 533 6466

Inverters : Batteries

We install Generators, Inverters / Battery Back up systems.

RSA Electrical (Sea Point Electrician) will make the process as easy as possible.

Number of Appliances that you want powered , as well as how many lights. (No Appliances that have elements or motors)

If you accept the estimate we visit you and go through a few options and then finalise the quotation.

From our experience, an Inverter with quality batteries, make for a perfect installation to give power to a few Computers, LED TV, DSTV and LED Lighting.

How do these systems work?

The unit is permanently connected to utility power so that while mains is present the extra large built-in battery charger recharges the batteries and keeps the batteries fully charged until a power failure (load shedding) occurs.

The equipment you want to back up is also permanently connected via the system. Back up means the designated circuit / equipment has a backup supply.

In case of a power failure the backup system automatically switches over, via an extra fast transfer switch to the inverter, which will continue to provide power to the equipment within 15 msec. This is not as fast as a UPS system, which is instantaneous.

This is extremely fast and standard equipment like TVs, DSTV decoders, microwaves, fans, etc. are unaffected. The sinewave systems can also backup computers but it is possible that a very small percentage of computers could reset during the switchover time.
Also wifi routers can reset.

When utility power returns, the whole procedure is reversed and the unit will switch back to utility power and will automatically start re-charging the batteries.

To the right is an installation of a 5kva Inverter with a lithium battery. Installation in an upmarket shop.
All lights, computer, wifi, alarm. Pylontech battery.


This depends on the load. By reducing your load during a power outage, the batteries will last longer. 
For example, using 1kW of power on a 1kWh system will deplete the batteries in an hour, but by turning off non-essential equipment and reducing the load to 500W the system will last 2 hours. 


Typically, battery back-up systems should be sized to combat load shedding which occurs in up to 2.5-hour segments and up to 3 times a day (Stage 4). The battery back-up system should be sized sufficiently to have time to charge fully between load shedding periods.

FAQ: Does the battery back-up system automatically switch to battery power when the grid falls away and does it charge the depleted batteries when the grid returns?

Yes, the system will seamlessly switch to battery back-up when the grid falls away and automatically use the grid power as soon as it becomes available to recharge the depleted batteries. 


There is no down-time for your essential equipment when load shedding kicks in.


Inverter installed in house in Sea Point

Your equipment remains connected to the system even when power is restored. The whole process is fully automatic.

The advantage of this that you don’t have to install a noisy generator. Generators need constant refilling and maintenance and are not ideal for residential areas or for small businesses where noise and pollution from the exhaust are a problem.

Our systems offered here are a sinewave inverter; with a built-in battery charger, automatic changeover switch and a large battery bank. There is a small fan on the inverter. We do not recommend or install modulated sine wave inverters, which are cheaper and have limitations.

Our assessment charge is : R620 ex vat.

Method : To install an inverter.

1. Site meeting, to establish what should be the critical circuits. There switch sockets will be changed to dedicated sockets, which will mean on the designated appliances can be plugged into these circuits.

2. Determine where the Inverter, Battery/ies, fuse holder, and new smaller inverter distribution board can be mounted.

3. To determine the size of the inverter and how many batteries.

4. To ascertain if any plug or light circuits need to be rewired.