We're obviously keen to address misconceptions and incorrect statements about our product when we see it being discussed on forums such as this, so I'll hopefully be able to address the points that have been raised in a clear and concise manner.
Firstly, reference is made to electric cookers and showers causing the unit to go into bypass. In actual fact, the installation instructions (available on the VPhase web site
HERE), specifies that resistive heating circuits should be excluded from being optimised as no savings can be made on these types of circuits. Therefore, electric cookers, showers and immersion heaters should not be optimised by VPhase. A further misconception related to this, is that these appliances account for the largest energy use in a property, but research carried out by DECC (July 2010) indicated that over 67% of a home's electrical consumption is typically from lighting and appliances - and these are things that VPhase voltage optimisation can and does make savings on. Whilst no savings can be made on irons or kettles that are plugged into optimised ring main circuits, and they will have to be on slightly longer to reach the desired temperature, they also won't lose money or cost more to operate.
The VPhase does not include full surge protection that can protect the home from transient surges and spikes, but as it stabilises the output voltage, it does help reduce the impact of fluctuating voltage supply.
The Which? article is something that is brought up from time to time - and an issue that we have responded to. A full response is available
HERE. In short, the Which? report did not conduct a thorough assessment of the product in its intended use and also drew unfair comparisons. For example, one of the principle reasons it suggested that the VPhase should be avoided was because the payback period (at up to 5 years) was too lengthy; yet in the same article, they also recommend Double Glazing, with a payback period typically over 10 years and a much higher capital outlay to the homeowner. VPhase has always been up front about the expected payback period (3 - 5 years), although with the continuing increases in electricity prices, this is reducing all of the time.
VPhase has gone to great lengths to test its product and have the results independently assessed and published. It has undertaken trials with Ofgem, British Gas, SSE and many social housing associations throughout the UK. Where possible, these results have been published on the VPhase web site. The savings claims have been independently assessed and demonstrated typical energy savings of up to 12%.
Our technical training video is scheduled for release on the 1st December. It includes a practical/technical installation guide and a Q&A session and will be available through our YouTube channel
HERE. It should address many of the questions and concerns that are raised by electrical installers.