Solar Installation

Solar Solutions For Your Business


PMK Recycling


Helping an industry-leading recycling company to power their business expansion.

         540 JA Solar panels                                    4 SolarEdge inverters     

144,664kWh p.a. generated                      86,768kg CO2 saved a year

The energy generated is over 60% cheaper than grid purchased fuel

Executive Summary

PMK Recycling are leading the charge and are at the forefront of a new interest and focus on recycling as part of the UK’s more caring approach to the environment. They found that the new equipment that they were investing in was potentially going to cause some challenges to the ageing local electricity grid infrastructure. In collaboration with Western Power and PMK Recycling our team used their experience working with challenging engineering circumstances to provide a best practice solution that would meet their needs in both reducing the energy load on the grid and enabling PMK to significantly reduce their Operational Costs for the sites power over the next 25 years.

The Client

PMK is a full waste management facility dealing with mixed and single stream materials such as plastics, cardboards, metals and glass. It has recently expanded and now serves local and national authorities assisting with cleaning up the environment and helping to meet recycling targets around the UK.

The Challenge

PMK Recycling was facing an exciting future full of growth opportunities and potential expansion due to the UK’s ongoing increase in Sustainability and interest in both the environment and recycling in general. In order to maximise both Operational capacity and Financial freedom from volatile rising energy costs, they needed a way to secure room to grow from both an engineering standpoint and one that provided some certainty for Financial forecasting of future Operational costs.

We were looking to achieve the following:

  • Maximise production of clean solar energy on-site, using existing rooftops
  • Provide a high-quality installation with built-in SolarEdge monitoring for reduced ongoing maintenance
  • Keep within a strict generation capacity limit – declared net capacity – defined by Western Power
  • Create long term financial savings that were clearly forecast to allow better financial modelling and benefits for cashflow

Our Approach

We met with the company Directors, actively listened to their wants and needs then set a schedule of expected deliverables with agreed timescales.

Our internal design team then used annual billing data from the client’s site along with electrical engineering data of machinery loads to calculate the energy requirements.

We then built the site in 3D using professional engineering software, applied varying solar pv system sizes to the building’s roofs and then modelled the solar production for a year, allowing for shading and sun-path tracking, in order to give us production data to overlay against their predicted usage.

This allowed us to size an appropriate system that would provide maximum value for money and energy output to meet their desired needs for increased future capacity and cost offsets in a rising volatile energy market.


Utilising in house expertise Poweri Services had the professional resources to provide a turnkey solution that required very little client input beyond the initial active listening and consultation phase, followed by a meeting to demonstrate our designed bespoke solution that met their needs.

The appropriate system size was settled upon, full H&S and structural surveys commenced, and permission was sought from Western Power for connection.  Minor modification was required due to net capacity limitations by Western Power. The re-designed system was installed a few weeks later and has been consistently meeting needs by saving money and reducing electricity supplied from the grid ever since – with the added bonus of evidencing reduction of carbon emissions produced on site.


Talk To Us >

Solar Photovoltaic (PV) System Installation Process Overview

The delivery of a larger solar PV project is typically carried out in 3 phases, Development, Construction and Operation & Maintenance.


1. Development Phase

(4-26 weeks depending on project type and complexity)

The development phase of the project is required to obtain all relevant approvals for the project and to finalise the system design and construction methodology. This ensures that the PV system is ultimately installed safely and in accordance with all required regulations, as well as to your and our high standards.

This phase is also where project funding will be secured if required.

Our industry leading experts in developing solar PV systems and our integrated project management approach lead to the smoothest possible project delivery every time. The key tasks for the development stage of the project are:

Site Survey:-

In order to ensure that the proposed system can be installed as planned, we carry out a detailed site survey specifically tailored to the proposed solar PV project.

G59 application:-

All generators that are connected to the Grid and will generate more than 16A/phase must have their connection pre-approved by the local DNO under ER G59 regulations

Solar PV system design:-

The detailed design of a solar PV system involves the mechanical and electrical integration of all of the PV components into the existing building fabric in such a way as not to disrupt the operation of the building, as well as insuring the safe and efficient operation of the PV system over its lifetime.

Energy Performance Certificate:-

The current Feed in Tariff regulations require that with some limited exceptions, all buildings much have an EPC rating of D or better in order to qualify for the higher rate of FiT payments for their size banding.

Structural Survey:-

One of the key considerations of the suitability of a building for the addition of solar PV panels is the strength of the existing roof structure and its ability to accept the additional dead and wind loadings imposed by the solar PV system, as well as its ability to serve as a safe working platform during installation and any maintenance works.

Asbestos Surveys:-

It is a key responsibility of building owners to keep and maintain records of the presence and condition of any Asbestos Containing Materials (ACMs) in their premises. It is also a key responsibility of us as an employer to take all reasonable precautions to protect our staff from exposure to ACMs and to this end we will always carry out a review of the asbestos surveys and records available during the development phase of a project. If the existing records are found not to cover the areas where we will be working, are inadequate to assess the risk, or absent altogether then we require that an Asbestos R&D survey be carried out covering the affected areas  and any remedial and removal works recommended carried out prior to commencement on site

Planning permission / Permitted Development:-

The majority of solar PV installation in the UK should fall under permitted development regulations provided they meet a few basic design requirements. With Key potential exceptions being listed buildings (Or buildings on a listed site), buildings in or near a conservation area and systems bigger than 1MWp. It is recommended that even if we are confident that the system will fall under permitted development that confirmation be sought from the local planning office, and if permitted development does not apply then full planning permission must be sought and given prior to the commencement of works.

Building Regulations Compliance:-

Various elements of works needed during the installation of a Solar PV system fall under category of notifiable under building regulations, most notably the additions to the electrical system and potentially the additional loads placed on the structure of the roof.

Preparation of site specific RAMS and CPP:-

A key consideration of the viability and cost of a solar PV installation is the safety of the installation works and the systems continued operation & maintenance. The cornerstone of this assessment is the preparation of detailed and site specific Risk and Method statement covering the works. If the project is notifiable, or requires the services of a Principal Designer under CDM regulations then we will also need to prepare a Construction Phase Plan (CPP) to demonstrate that we have carefully and properly considered all foreseeable risks in the project and  takes steps to address and reduce those risks. We also believe that it is not possible to fully assess the true costs of a project until this has been carried out, as some necessary safety arrangements may be highlighted that require some cost to be incurred in removing that risk

Securing of funding stream (If required):-

If the project is to be funded by a third party under a Power Purchase Agreement, then the final contract for this funding will need to be signed before construction begins, but once all costs are known and all approvals have been obtained.

Our process for completing the development phase of these projects is to:-

  • Following an indicative quotation for the full project, agree the price for the development work with the client and take an order for that work.
  • We will then complete those elements of the development phase and work with you to find the best way of delivering the project.
  • Once the development work is complete and it’s clear that the project can proceed we would ask that you give us first refusal to carry out the installation at the quoted price
  • If it is agreed that we will carry out the construction, then your order would be amended to include the full construction price as quoted (Plus or minus any variations as identified and agreed during development) and we will commence with the construction works.
  • If however the project cannot go ahead, or it does go ahead but, by agreement, you do not use us for the construction then we would invoice for the development costs.
  • If no other arrangements are made, development costs will be payable upon expiry of our final quotation for the construction phase of the project.


2. Construction Phase

(Typically 1 to 2 days per 10kWp)

The construction phase of the project comprises the time period from the initial arrival on site and the habitation of welfare facilities to the date when all plant and materials have been removed following the completion of the project and welfare facilities have been vacated.

Poweri Services Ltd would usually act as principal contractor for this period unless another party is appointed to fulfil this role

The key tasks for the construction phase of the project are:-

  • Set our and habitation of welfare and storage facilities according to the detail laid out in the CPP.
  • Set out of all traffic management, signage, demarcation and fencing required by the CPP
  • Erection of scaffolding, lifting equipment, safety equipment and any other plant deemed necessary for the safe completion of the project.
  • Construction of the rooftop elements of the solar PV system
  • Installation of all electrical elements of the PV system
  • Integration into existing electrical system
  • Commissioning of the solar PV system
  • Finals inspections and sign off of construction works by Poweri Services Management and any other parties
  • Striking of scaffolding and welfare facilities and site clearance (Plus making good if necessary)
  • Preparation and submission of O&M Handover pack
  • Practical completion


3. Operation & Maintenance Phase

(Ongoing for system lifetime – 20-35 years)

The Operation and Maintenance phase comprises the full operation al lifetime of the solar PV system (Typically 20-35 years). Whilst solar PV systems are relatively low maintenance, because they are revenue generating appliances and represent a significant saving on imported electricity costs, their smooth operation has significant financial value.

Poweri Services Ltd strongly recommend entering onto a formal O&M contract to ensure the trouble free operation of the solar PV system for its lifetime. In our experience it is all too easy for the system to be forgotten once it is working, particularly if staff roles or responsibility changes happen, and we have seen instances of system being non-operational for some time due to simple reasons leading to significant lost income when having a dedicated supplier looking over the system would have picked up and rectified the problem quickly.

Poweri Services Ltd offer a system yield guarantee for the duration of O&M contract. Please contact us for full details

Key indicative tasks in the O&M phase of the project are:

1. PV Modules & mounting system checks

  • Check system documentation and labelling is in order
  • Undertake either on roof (where access / safety equipment in place) or if not, a visual inspection from ground level (i.e. with binoculars or similar) to check:
  • Security of mounting system (e.g. slipped panels, missing/broken clamps)
  • Presence of heavy soiling/ detritus
  • Any cables loose / damaged

2. Inverter checks

  • Check and clean the inverter enclosure in order to remove dust, dirt, moisture, water ingress from the outside or any other external body capable of affecting the performance or reducing the longevity of the PV system
  • Check all cooling / ventilation fans (if present). Clean / replace any filters
  • Check inverters’ functions and fault log according to the manufacturers’ installation and operation manual
  • Check the correct function of the inverters’ remote monitoring system (if present)
  • Check all AC and DC connections are secure, free of discolouration, signs of arcing etc. and make good where necessary

3. Electrical Tests

  • For all inverters – test the DC and AC according to BS7671 (latest edition) including, for example insulation resistance, earth impedance, open-circuit voltage, short-circuit current
  • Open DC and AC isolator enclosures to check connections are secure, free of discolouration, signs of arcing etc. and make good where necessary
  • Visual inspection of the interconnections where to the extent possible without removing panels
  • Visual inspection of the string fuse(s) and DC Junction boxes (if on roof will require roof access and necessary safety equipment to be present)

The full extent of checks and tests required will be finalised and agreed prior to the commencement of the O&M contract and may differ depending on the individual system requirements

Contact Us >

Customer Reviews

Poweri have been incredibly professional in the way they have undertaken this project.  They have delivered in a timely way throughout  duration of the project, keeping to their original budget.  Poweri worked very well with all the other contractors on site and they have supported us enormously with all the OFGEM paperwork.  The project was a huge project for us, but we always knew we could rely on Poweri, particularly at critical points.

View More Reviews >
Elecsa CHAS Accredited Contractor TE Certified Installer NICEIC Approved MCS RECC Planet Mark - Eden Project