Typical Monthly cost savings
Average Monthly electrical consumption of a household |
1000 kW |
Average Monthly consumption of the geyser |
430 kW (45%) |
Current cost per kW electricity usage |
R1.77 (varies region to region) |
Current cost of running a geyser on average |
R500 per month |
Electrical energy saved per month when converting to solar geyser |
215 kW (50%) * conservative value affected by various factors |
Cost of installed water heater (Geyser) |
R6 612 (on 100l unit) (Varies from system to system) |
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Cost of corresponding size electrical geyser (including installation!) |
R6 500 |
Extra cost of solar geyser |
R6612 - R6 500 = R112 |
The monthly kW savings: |
430 kW - 215 kW = 215 kW |
Monthly Rand savings: |
215kW * R1.77 = R380.00 |
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Resultant payback period if you HAVE to replace your existing geyser |
R112 / R380.00
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Payback period if you are simply replacing your electrical geyser (ie. You didn't NEED to replace an existing geyser.) |
R6612 / R380.00 = 17.4 months
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