Solar PV FAQs

What is solar PV technology?

Solar PV means Solar Photovolatiaic. Photovoltaic means turning sunlight into electricity. Truly miraculous stuff. Solar Photovoltaic technology is the most common and successfully deployed solar technology. Of course all technologies use solar power in the final analysis but we call all technologies solar technologies if they get the energy directly from the sun. The other most common solar technology is solar thermal (meaning turning sunlight into heat). We also deliver solar thermal technology for domestic and commercial premises.

What is the definition of a ‘site’?

A site is defined as a group of eligible installations or accredited FIT installations situated in close geographical proximity to each other, with reference to:

  • The relevant Metering Point Administration Number (MPAN)
  • Installation location address (including post code), and/or
  • Installation location Ordnance Survey (OS) grid reference
  • Any other factors that OFGEM considers relevant. For example, we would also consider the planning situation and any electrical or mechanical interactions between the Installations.

Are all PV Panels the same? Why are some called Tier 1, Tier 2 or Tier 3?

The pyramid below, by Pike Research, lays out its version how it differentiates the 3 tier rankings of solar panels manufacturers from one another. According to Pike, Tier 1 manufacturers represent only a small slice (2%) of the total number of manufacturers on the market, but a number of factors set them clearly apart from their competitors.

  • First of all, they are vertically integrated, meaning that they don’t simply assemble solar panels using other companies’ products, they manufacture their panels from the ground up. This means that they control the production process for everything from the silicon cells to the modules frames and ultimately panel assembly.
  • Tier 1 installers invest heavily in research & development (R&D) and continually innovate in order to improve their products and processes.
  • Tier 1 installers also use highly automated manufacturing techniques that are conducive to a standard level of quality, while (in many cases) saving money on manufacturing costs at the same time.
  • Finally, at least 5 years’ history producing solar panels is the other criterion for being considered Tier 1 for Pike Research. Having been around for at least this amount of time in what is a relatively young industry is testament to a company’s commitment to its own longevity as well as to its customers, and is indicative of the likelihood that that company will still be around in 20+ years’ time to service its warranties.

Tier 2 solar panel manufacturers
Manufacturers ranked as Tier 2 are the ‘middle ground’ between Tier 1 and Tier 3, comprising about 8% of the market. Although they have been producing panels for longer than Tier 3 manufacturers (2-5 years), they still invest relatively little money in R&D compared to Tier 3 manufacturers. Robotic automation does not always play a major role in their panel production lines. Many Tier 2 manufacturers doubtless have Tier 1 aspirations, but may not have the wherewithal or experience to yet make the cut.
Tier 3 solar panel manufacturers
Tier 3 manufacturers comprise the bulk of the market (90%), according to Pike Research, but have the least experience. Their operations are limited to assembling panels using components manufactured by other companies (i.e. no R&D operations of their own), and their production processes are highly reliant on manual labour. With solar panel manufacturers across the globe facing hard times due to a massive glut of stock, it is not unreasonable to think that many of these companies will not be around in the next few years as the industry consolidates.

Contact us for more Solar PV information


If you would like to find out yet more information regarding solar PV renewable energy solutions, simply contact our team by calling 0118 984 1753, or leave your details on our contact us page and we’ll reply as quickly as possible.

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