Solar PV and VPhase

Solar PV and VPhase voltage optimisation are two complementary technologies that can benefit from being installed alongside  each other, reducing the overall payback period and improving the return on investment for the consumer.

Save and generate energy at the same time

  • Energy demand control complements renewable generation
  • Voltage optimisation lowers the household energy consumption by up to 12%

Improve the value proposition

  • Using a VX5 with an integral 6 way Consumer Unit avoid changes to existing Consumer Units
  • When installed along with a PV array incremental costs are minimal
  • The payback for the combined installation is improved

Mitigate the effects of local grid voltage increase

  • Increasing use of solar PV is increasing local grid voltages
  • Increasing grid voltages increases energy consumption in the home
  • Voltage optimisation offsets this energy increase

Extend the life of electrical / electronic devices

  • The lifetime of devices is directly rated to operating temperatures
  • Voltage optimisation reduces energy wasted as heat
  • This lowers operating temperatures and extends operating lifetime


Can VPhase be connected to a house containing microgeneration?

Yes, however simple rules should be observed:

Due to legislation (G83/1, BS EN 50438) the microgeneration technology must not supply power through the VPhase unit optimised circuit. I.e. do not plug directly into a VPhase optimised socket outlet or fused spur. Always connect the microgeneration to an independent circuit in the consumer unit. Legislation requires that microgeneration must be automatically disconnected if the utility (supply) voltage rises above 264V. The
refore the microgeneration must not be connected directly to a VPhase optimised circuit.

The embedded generation must not be directly connected to Voltage Optimised circuits 5 to 9. In this example an extra non-Voltage Optimised circuit has been included (Circuit 10) connected at RCD2 for the embedded generation.

Will the embedded generation continue to supply all of the electrical loads at the property? Yes

Loads on the VPhase supplied Voltage Optimised circuits will still be supplied with power from your embedded generation. Electric current will flow from your embedded generation through the VPhase and on to the Voltage Optimised circuits. The current path will be as shown below.







Please contact one of our regional Sales Managers to discuss how you can scope the VPhase Voltage Optimisation device into your jobs. We have an extensive network of distributors and wholesalers throughout the UK from which you can buy the VPhase device. Our sales managers will also help advise about the features and benefits relating to the product and the joint benefits from combining the VPhase with a solar PV installation.

  • South West - Adrian Fishley -
  • North - Neil Morris -
  • Midlands - Daniel Laud -
  • South East - Mark Treadwell - 

We also have a list of solar PV installers who work with us here.

Frequently Asked Questions

We realise the VPhase device is a technical product,but to help you understand more about it and the features you can benefit from – read our Frequently Asked Questions, HERE

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