Home power backup systems – electrical engineers answer your questions.
, the finance minister introduces tax breaks for solar generation expenses in the budget speech on 22 February, solar panels will have to be part of your setup if you want to benefit from these incentives.
No matter what Enoch Godongwana announces, we think this is a good time to make the switch to a solar powered backup system, for your peace of mind and future savings.Inverter prices are falling as the market grows, and vary across suppliers. Inverters cost about R3,000 per kW for bottom of the range, and closer to R7,000 per kW for top of the range.
Most households will get by with a 3kW to 5kW inverter, if its loads are managed well, costing between R9,000 and R35,000 .Most households will get by with a 5kWh to 10kWh battery if the loads are optimised and managed well. So you’re looking at a cost of between R25,000 and R70,000 for the batteries.
Solar panels tend to range from R8,000 to R10,000 per kWp . Again, they’re not crucial, but are necessary if you want the system to pay for itself over time.The inverter needs to be installed into the distribution board and the cost will depend on how many of your circuit breakers need to be moved to the backup as well as how easy the solution is to install; installation typically ranges from R10,000 to R20,000 .
The inverter must be approved by the municipality if you want to feed back into the grid. Installing the solar panels is separate, and costs vary widely.
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