How to find the most efficient solar water heater

an evacuated tube solar hot water system

Is the evac tube system really more efficient than the flat plate system you have been quoted? Here’s how to find out…

When you are looking to buy a solar hot water system for for home, one of the most important things to check (apart from the price) is the efficiency of your Solar Hot Water System. The more efficient your system is, the better it will be at converting the sun’s heat to piping hot water, which means you will use your gas or electric boost less.

But with thousands of models of solar water heaters on the Aussie market, from flat plate or evacuated tube, to heat pumps it can be difficult to know how to find the most efficient solar water heater. Especially when each sales person says their technology / model is the most efficient! They can’t all be right…

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Solar Hot Water vs Solar Panels. Which should you buy?

Poor old Solar Hot Water.

The concept of heating water directly from the Aussie sun with a solar hot water system like this…

a solahart hot water heater

The humble solar hot water heater

…really seems to have gone from hero to zero over the past 3 years. [Read more…]

What Should You Buy First? Solar Hot Water or Solar PV?

Solar Hot Water is fast becoming the poor cousin of Solar PV (AKA Solar Electricity). Consumers just seem to prefer solar PV to solar hot water these days. In fact solar hot water has gone from almost zero to 1,000,000 roofs in about 30 years, whereas PV has gone from almost zero to 1,000,000 roofs in less than 6 years. There is now more PV than Solar HW out there! Unbelievable.

It doesn’t help that retailers prefer to sell PV over hot water – for a whole bunch of reasons that I’ll go into in a future blog post.

Here’s a video where I answer the question posed in the title: Should you buy Solar Hot Water or PV first?, But first I answer a much more fundamental question that creates an enormous amount of confusion out there:

And here’t the transcript for the video-phobes amongst you: [Read more…]

Huge Subsidies (and waiting lists) for Solar Hot Water in QLD

The Queensland Solar Hot Water program is delivering and installing $500 systems for eligible Queenslanders and $100 for pensioners. But as you might expect, there is the mother of all waiting lists.

To date more than 850 customers have been allocated to suppliers to conduct inspections and install new systems.

By the end of this week over 110 systems will have been installed in Brisbane and a further 200 have been contacted to arrange site inspections.

More than 43,000 Queenslanders have registered their interest to participate in this program with more than 10,000 completed applications received so far.”

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Which power source is the most water efficient?

As we all know Australia is a very dry country where water is one of our most valuable resources.

So how much water do we need to generate our electricity?

The generation of 1 kWh of electricity by way of nuclear power uses 2.3 litres of water.

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Solar Plumbers In Hot Demand

There is a large demand for trained craftsmen in Australia due to the recently announced government rebates that can be issued if a home installs a hot water heater that is run by solar energy instead of electric.

If the initiative is successful and all homes took advantage of the funding to install the solar water heaters it is estimated that green house emissions in Australia would reduce by approximately 12 million tons a year. [Read more…]