Re-installation of

Sky Power Solar Water Heating Systems 

by Insurance Contracted Plumbers

For many years we have taken pride in the quality, the reliability and high performance of our solar installation. We have earned the respect of our customers and won their confidence that we will always do an outstanding job at maintaining the efficiency and cost effectiveness of their systems.

In recent weeks we have become aware, after the fact, that some of our installations have had geysers changed by the customer's "Insurance Company Contracted Plumbers".

Unfortunately many insurance companies insist that they use their sub-contracted plumbers to carry out geyser changes in the event that the geyser has burst. The images below are examples of some of the work such sub-contractors have carried out.

Subsequent to the geyser being changed, some customers have contacted us to "Check Out"their systems as they "seem to have not been performing as well as they had previously".

This is what a Typical Sky Power installation looks like...

It is neat and tidy. It provides for draw and return of water to and from the solar collector. It provides the necessary secondary temperature measuring port and continues to utilize the manufacture's safety thermostat. On the hot side :- temperature is measured via an additional thermostat pocket which reaches into the geyser. It is safe, there is no danger of fire or risk to servicing personnel.

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This is typical of what the some of our customers have after insurance approved plumbers had replaced their geyser having removed and discarded the solar conversion flange in favor of their own technique.

• Thermostat Missing - therefore no safety cut out - allows element to boil the geyser.
• Bare wires pushed into the element have caused them to burn and melt the Element insulator.

Notice the black smoke mark on the flange. 

• Pump has moved to cold water inlet, far from the T2 temperature sensor – 

This will make the system ineffective as it will cause the pump to circulate without reference to accurate temperature readings.

The next two images show the hot side connections of the geyser.

• Above Left
• Solar Return has been moved to the back of T/P Valve.

Returning water via a T connector behind the TP valve renders the TP valve ineffective at the purpose for which it is intended, (potentially making the installation unsafe) and will in many cases open repeatedly when the geyser is up to temperature and the collector is stagnant.

• T3 Solar Temp Sensor clamped to hot water pipe without any insulation. 

This will falsely under-read and cause excessive use of heating element :– 

• Lack of the Thermostat will cause the geyser to boil.  

This will prevent any solar benefit and will cause frequent discharge from TP valve. 

• Above Right.
• Another example at a different site where the T3 sensor has been clamped to the hot water pipe almost half a meter away from the geyser outlet and again without any insulation.

This next picture shows the T2 temperature probe, of another installation, left lying in the drip tray.  

This is the primary temperature measurement in such systems. Without this temperature reference no solar heating benefit will be derived.  In fact it will cause additional losses causing the element to be on for most of the time.

The retro fitting of solar panels to geysers is of course perfectly acceptable and commonplace but does require that accurate temperature measurement is provided and that circulation to and from the solar collector is handled correctly.

This was possible on many of the older geysers that used the Satchwell type of "screw in" element with a built in thermostat pocket and where there was also a separate thermostat pocket in the geyser.

Even the clamping of temperature probes to external pipework can be sufficient in certain circumstances, provided it it close to the output of the geyser and well insulated.

The problems occur when poorly trained staff expecting just to swap an electric geyser out are faced with a solar conversion.

In summary.

Certain sub-contractors are transforming safe and highly efficient solar water heating systems to an ineffective collection of components that provides no benefit to it owner.

It has created the"appearance of a working system" but in reality "all heating is now being derived from electrical energy". 

Disclaimer: I have no idea which insurance companies or contractors have been involved in the provision of these services and am not pointing any fingers.

I do however encourage my customers to call us before contacting their insurance companies, We will happily assist in ensuring that your system is re-built as it should be and will continue to function as it was intended saving at least 85% on water heating costs.

Electricity Back-up systems for Load-Shedding.

As a result of requests from customers who have been very happy with our solar water heating systems, our service and support. We are pleased to announce that we are now offering Solar PV and Electrical Power Back-Up systems in addition to our best of breed solar water heating products.

It is apparent that many suppliers are now entering the Solar Power market. Offering systems ranging from ludicrously cheap to outrageously expensive. 

How do you gauge what you need in order that you can be confident you are not either over or undersold.

In the same way as we did with our solar thermal offerings, we have tried to make the technology and terminology understandable enabling you to be confident that the product you invest in will meet you expectations.

With this easy to operate Excel based calculator. Electricity Backup Calculator You can select how many and what type of lighting and or appliances you want to be able to run during load shedding outages.

Electricity Backup Calculator

The calculator will then indicate how long you will be able to run these lights and devices and the number of batteries that will be required.  It further indicates what size of Inverter you require.

Almost any size of back-up capacity can be provided, it all comes down to money.

The above calculator only considers applications up to 3000W. Beyond this size many other options become available and would need to be designed specifically to you requirements.

What do we need to keep running?

The first objective for most people is light. With light you you can feel safe and secure. 

Secondly for many, entertainment would be the second consideration. You will need enough power to run the DSTV decoder or DVD player and a TV.

Thirdly, few of us can do without our computers for long, the need to have access to email is critical. at home this will also mean needing power for the ADSL router and wireless access point. How many of us have children that need access to the internet for their studies. 

Cell phone smart phone and tablet charges are also on the essential list.

Next many people need to provide power for automation. Garage doors and Gates. Some have built in backup others do not. Perhaps you would like to extend the operation of these devices by keeping them powered during outages.

Then of course being South Africa, come the Security Systems.... electric fences, perimeter beams, perimeter lighting and of course the alarm system itself. 

Many people have noticed that the battery life on their alarms systems and electric fences has reduced due to the increased number of times the dedicated batteries have to run.

It is our belief that the above represents a typical minimum list of appliances we may want to cater for during load shedding of even outages caused by faults or cable theft. If you think of any others please let us know and we will add them into the selection on the calculator.

We have to expect that Load-Shedding will be with us for at least the next 5 Years.

Meet Today's Needs and Add Solar Panels Later.

It is our goal to be able to provide you with the right level of back-up for you needs as the immediate short term goal.

Secondly we have taken care to select a product range that is robust, flexible and upgradeable to be able to allow the addition of  Solar PV panels for Solar Charging as and when it makes both practical and financial sense.

Please feel free to contact us at any time to discuss your requirements and concerns about providing backup for Load Shedding.