Why Solar? Because SolarworX
solar heat pump

ESKOM Rebate

Afraid to Ask






solar geysers
We have tried to answer as many questions as you may have in this section. However, we know that each of our client’s needs are specific to their circumstances.

Please feel free to either email us or call us and we will do our best to answer your questions.
Click here to email us your question or request a FREE, No obligations quote
Call us on 082 411 5412

The questions you may be afraid to ask

How much does it cost to install?

Prices of the various systems vary according to the following factors:

1. Size of Geyser - 100L; 150L; 200L; 250L; 300L are our most popular
2. Thermisiphon Vs. Pumped System – a Thermosiphon system is usually cheaper than a Pumped system as it has less components and is easier to install as the whole system sits on top of the roof. However it may require a flat roof stand, or special pitched roof support. Each situation is unique.
safe energy 3. Solar Vs. Heat Pump – We will always give our clients as many options as we believe are applicable to their specific circumstances, and recommend the one we believe to be the best.
We strongly recommend that you take advantage of our no obligations and completely free offer to conduct a site visit and provide you with a quote.
By the way we will match and better any reputable agent’s prices on a like for like basis! What have you got to lose? Contact us NOW and start saving money! (Click here to contact us now)

My geyser has burst – can I replace with a solar ready geyser straight away and install the solar collector later?
YES – this is the perfect time to switch to solar!
Your insurance will pay for the replacement of a normal geyser but you will have to pay the nominal difference of between R1000-R4500 depending on the size of the geyser.
Remember your new Solar Geyser has a 10 Year Guarantee (vs. the old 5 year Guarantee!)

What happens when it is cloudy?
Solar - Have you ever been on the beach on a cloudy day and not put on sun screener? Remember how burnt you ended up? That is because the UV is still cutting through the cloud cover.
The good news is that the UV is the active ingredient in solar collectors, and this heats the tubes or the panels. Obviously on very cloudy day even this is cut out – all the geysers come with electrical back-up. This means that your geyser operates just like a normal geyser on those wet cloudy days. However with an average daily sunshine of between 7 and 10 per day in Johannesburg, solar is definitely the way to go!
Heat Pumps – these work on Ambient air temperature and work at 24hours a day!

solar collectorDoes the cold affect the efficiency of the solar collector?
Cold cannot be transmitted through a vacuum. As such, vacuum tubes are more efficient in cold areas.
Flat plates are affected slightly be cold weather in that the cold is transmitted to a degree to the water.

What are the operating temperatures of the Heat Pump?
Heat pumps operate between -7°C and 43°C. In fact in areas such as the Drakensburg where weather conditions mean that the sun is not always available, heat pumps are ideal, despite freezing winter conditions!

Will I always have hot water?
Your solar installation will have its timer set to ensure that you will have hot water just as you did when you had an electricity guzzling system.

Can solar systems heat water to a high enough temperature?
Solar heaters are extremely efficient in heating water. As a result they are capable of raising the water temperature well above the usual 65°C of a usual geyser. This also contributes to the electricity savings as you will be using less hot water to achieve the same mixed temperature.

What happens if I shower in the evening and the morning? Will I have hot water in the morning?
Yes – As part of the ESKOM requirement, ALL solar rebate systems are equipped with timers. The timer activates the geyser element to ensure that you have hot water AND save as much electricity as possible. So for Monday to Friday the Timer would be set something like this:

16:00The Solar collector heats water all day to a temperature which is usually in excess of the usual 65°C of a normal geyser
No Electricity is consumed.16:00Timer activates Thermostat
If water is below 65°C, electrical element is turned on to heat water 17:30 The kids have a bath and use 100L of Solar heated water dropping the temperature to approximately 40°C
The electrical element will heat the geyser to 65°C19:00The Timer turns off the Thermostat19:00
04:00No Electricity is consumed04:00Timer activates Thermostat
If water is below 65°C, electrical element is turned on to heat water
but as the Duratherm geyser has a 60mm insulation and is 2-5% efficient even on a cold winter's night, the water in the geyser will be very close to optimum temperature and require very little electricity06:00
07:00The family showers and leaves for a busy day.07:00The Timer turns off the Thermostat
What kind of savings can I expect from a Solar solution vs. a Heat Pump?
Water heating consumes approximately 40% of your total electricity bill. Depending on your usage habits it could mean that you your thermostat rarely turns on your geyser element, or it just has to lift the temperature slightly in the early morning. This combined with the timer means that you could save the entire 40% in a solar solution! It is safe to estimate approximately 60-70% saving on your water heating bill.
Heat Pumps utilise approximately 25% of the normal energy required to heat the water to the desired temperature. This means an average of a 75% saving!

Can my existing geyser be converted to solar?
solartherm YES. Although it is slightly cheaper to convert your existing geyser, you will probably find that it is better to replace. Remember that your existing geyser only has a 5 year guarantee at best, and the clock has already been ticking.
The WE Solartherm Geyser which we use has a 10 year guarantee AND the following other advantages:
iA 60mm insulation vs a 20mm insulation layer iiA polyurethane inner casing as opposed to a galvanised inner casing – no slow deterioration.

Can my existing geyser be converted to a heat pump Solution?
Heat Pumps come with and without their own hot water storage tanks. Clearly the former are more expensive, and the latter can be installed in such a manner as to utilise your current geyser as the water storage tank.
How long does it take to install a Solar or Heat Pump system?
Depending on the complexity of the installation, this is usually 4-8 hours.

Who will install the system?
SolarworX only uses qualified and registered plumbers who have ESKOM accreditation to install our systems.

Is the solar collector freeze resistant?  
Flat Plate Collectors - Yes, the systems have been tested by the SABS and have passed the recommended freeze tests when combined with an Anti-freeze Dump Valve.
Vacuum Tube Collectors - Due to the fact that no water is in the evacuated tubes, there is no water to freeze.
What happens if a vacuum tube breaks?  
Due to the fact that there is no water in the tube, there can be no leaking. The broken tube can then be replaced at any time, however the system will keep on functioning - the efficiency will be a little less until the tube is replaced.

energy savingTechnical
What is a Controller and what is the difference between a Controller and a Timer?
The Controller is used in a Pumped System and controls 2 items:
1The Pump which circulates the water between the Collector and the Geyser – it only turns on the pump when the collector is 8degrees hotter than the tank, and stops circulating when the tank reaches 80degrees Celsius; and,
2The Thermostat, which checks the tank water temperature and controls the element. All rebate products require a timer to be installed in your electricity box by ESKOM. This will ensure that the element does not turn on during peak times.

Geyser - 10 Year Limited Guarantee from LOCAL Manufacturer
Flat Plate & Vacuum Tube Collectors - 5 Year Limited Guarantee from Manufacturer
Electrical Components - 1 Year Limited Guarantee from Manufacturer
Heat Pump – 1 Year limited Guarantee – possible to extend up to 5 years with an affordable maintenance contract

Payback Period
The real question is “How long will it take me to pay back my capital outlay, before I can start enjoying the savings?”
The accepted norms are as follows:
Water heating consumes 40% of your electricity bill.
Solar Systems can conserve up to 75% of that cost, and in some instances 100%, depending on the usage patterns and demands on the hot water in the household.
Heat Pumps usually conserve 60-75% of the water heating bill.
SolarworX will provide as estimated savings table with your quote, based on your average electricity bill and the actual quote, in order to provide an estimated payback period.

solar healthCost
Prices of the various systems vary according to the following factors:
1Size of Geyser - 100L; 150L; 200L; 250L; 300L are our most popular.
2Thermosiphon vs. Pumped Systems – Thermosiphon is cheaper that a Pumped system - less components etc.
3Low Pressure vs. High Pressure Systems – Low pressure systems are less costly than high pressure systems both in terms of supply and installation.
Prices vary from a NETT figure of approximately R1500.00 for a 150L Low Pressure, through R15,000 NETT for a High Pressure, Thermosiphon 300L, to R17,000 Nett for a pumped 200L system.
It all depends what the best solution is for the particular application, and the site conditions.


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