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Trustworthy solar panel installers – what must you look for?

When considering the transition to solar energy, the trustworthiness of your chosen installer is paramount. In the ever-expanding market of solar panel installers in the UK, ensuring reliability and credibility can make or break the success of your solar investment.

According to UK Energy Trends, 2023, the demand for sustainable energy solutions has risen by 30% in the past year alone, emphasising the need for trustworthy solar panel installers.

They not only install your solar PV panels correctly and efficiently but also offer a workmanship guarantee and a number of additional services including bird-proofing, maintenance, repair, battery storage solutions, and more.

This blog aims to help you find a trustworthy solar panel installer near you. Would you rather speak to an expert solar panel installer directly? We’re here for you – just give us a call on 020 8087 0216 or email enquiries@tarvenlimited.co.uk now!

7 crucial points to consider for a trustworthy solar panel installer

  1. Certifications matter

    When it comes to reliable solar panel installation in London, certifications serve as beacons of expertise and reliability.

    NICEIC, the National Inspection Council for Electrical Installation Contracting, stands at the forefront of these certifications, ensuring that the chosen installer possesses the necessary electrical competence and adheres to stringent safety standards.

    When selecting a solar panel installer, insist on NICEIC certification to guarantee the secure and proficient execution of your solar project. This certification not only underscores the installer’s commitment to industry excellence but also provides you with peace of mind, knowing that your electrical systems are in capable hands.

  2. Local expertise

    Navigating the diverse landscape of London and the South East demands a nuanced understanding of regional intricacies, regulations, and environmental factors.

    Trustworthy solar panel installers with local expertise bring a wealth of knowledge to the table, ensuring that your solar solution is tailored to the specific challenges and opportunities presented by your location.

    Beyond technical competence, local experience enables installers to optimise system performance based on regional climatic conditions, ensuring your investment thrives in the unique environment of London.

    Choose an installer with a proven track record in your area to benefit from their localised insights and enhance the overall success of your solar venture.

  3. Transparent quoting

    Transparency in the quoting process is the cornerstone of a trustworthy solar panel installer. A reliable professional takes pride in providing clients with clear, detailed, and comprehensible quotes, leaving no room for ambiguity or hidden costs.

    Transparent quoting demonstrates the installer’s commitment to open communication and ethical business practices, fostering trust between the client and the service provider.

    As you embark on your solar journey, prioritise installers who lay out all costs and potential fees upfront, empowering you to make informed decisions and ensuring a smooth and financially transparent solar panel installation process.

  4. Customer reviews and testimonials

    The digital age has bestowed upon consumers a powerful tool for evaluating the credibility of service providers – customer reviews and testimonials.

    Trustworthy solar panel installers showcase a portfolio of successful projects and positive feedback from satisfied clients. Before committing to an installer, delve into these testimonials to gauge the installer’s reliability, workmanship, and overall customer satisfaction.

    A robust collection of positive reviews is indicative of a consistently high standard of service, providing you with valuable insights into the installer’s performance and reliability in delivering successful solar solutions.

  5. Quality products

    The longevity and efficiency of a solar energy system hinge significantly on the quality of the components used. Trustworthy solar panel installers prioritise the use of high-quality solar panels and equipment, offering transparency regarding the brands and specifications of the products they install.

    By choosing an installer committed to quality, you not only ensure the durability and performance of your solar panels but also position yourself to reap the maximum benefits of your sustainable investment.

    Pro tip: Request detailed information on the brands and features of the solar panels proposed by the installer, allowing you to make an informed decision based on the quality and reliability of the products incorporated into your system.

  6. Warranty and after-sales service

    A reliable solar panel installer goes beyond the installation phase, standing firmly behind their work with robust warranties and exceptional after-sales service.

    When evaluating potential installers, enquire about the details of the warranties covering both the panels and the installation work. A comprehensive warranty not only safeguards your investment but also reflects the installer’s confidence in the durability and longevity of their installations.

    Additionally, understanding the after-sales service offered by the installer ensures that any post-installation concerns or issues are promptly addressed, further solidifying the reliability and commitment of your chosen solar panel installer.

  7. Financial options

    Embarking on a solar energy journey often involves financial considerations, and a trustworthy installer recognises the importance of providing flexible financing options.

    Whether through partnerships with financial institutions or in-house financing plans, reliable installers seek to make solar investments more accessible to homeowners and businesses.

    During the selection process, discuss available financial options with potential installers, exploring payment plans and potential incentives or rebates.

    By opting for an installer with a commitment to financial flexibility, you make your solar investment more affordable and align yourself with a service provider dedicated to facilitating your transition to sustainable energy with minimal financial strain.

6 important questions to ask your prospective solar panel installer

  1. Can you provide references from previous installations in this region?

    Ask for tangible evidence of the installer’s success by seeking references from past installations in your specific locale. Previous clients’ experiences offer valuable insights into the installer’s reliability, workmanship, and ability to navigate the unique challenges posed by the London environment.

  2. What is the estimated timeframe for the installation process?

    Understanding the timeline for your solar panel installation is crucial for planning and coordination. Enquire about the estimated timeframe, ensuring alignment with your schedule and any specific requirements you may have.

  3. How do you handle unexpected issues or complications during installation?

    Address potential hurdles head-on by discussing the installer’s approach to unforeseen challenges. A trustworthy installer should have contingency plans in place, demonstrating adaptability and professionalism in the face of unexpected complications.

  4. What warranties do you offer on both the panels and the installation work?

    Ensure the longevity and reliability of your investment by exploring the warranties provided by the installer. Comprehensive warranties on both the solar panels and the installation work reflect the installer’s confidence in their products and services.

    At Tarven Solar Energy, you get a 5-year workmanship guarantee on our solar PV panels. Get in touch to learn about our product warranties and more information.

  5. Can you provide a breakdown of all costs involved, including potential additional fees?

    Transparent communication is key to a successful solar installation. Request a detailed breakdown of all costs, including potential additional fees, to avoid surprises and ensure a clear understanding of the financial aspects of your solar project.

    We can’t tell what others do, but our team at Tarven would love to discuss your requirements and offer a detailed quote based on that. There will be no hidden fees – rest assured!

  6. Can you help with planning permission?

    Navigating the complexities of planning permission is crucial for a smooth solar installation process. Enquire whether the installer can assist you in obtaining the necessary approvals, providing valuable support and streamlining the regulatory aspects of your solar project.

    A knowledgeable installer familiar with local regulations can significantly simplify the planning permission process, ensuring compliance and a hassle-free installation experience.

3 steps to take before you start looking for a solar panel installer

  1. Educate yourself

    Before diving into solar panel installation, empower yourself with foundational knowledge. Understand the basics of solar energy, different types of panels, the installation process, and potential costs.

    Familiarise yourself with the expected return on investment and grasp the environmental benefits of transitioning to solar power.

    This self-education not only equips you to make informed decisions but also facilitates more meaningful discussions with prospective installers, ensuring that your solar project aligns with your goals and expectations.

  2. Set clear goals

    Define your energy goals and budget constraints before embarking on the search for a solar panel installer. Establishing clear objectives helps streamline the decision-making process and allows you to communicate your priorities effectively.

    Consider factors such as the desired energy output, environmental impact, and financial investment. By having a well-defined set of goals, you can narrow down your options and focus on installers who align with your specific requirements, creating a more targeted and efficient selection process.

  3. Research local regulations

    The regulatory landscape for solar installations can vary, necessitating a thorough understanding of local regulations and permitting requirements. Research and familiarise yourself with any zoning laws, building codes, or permits necessary for solar panel installations in your area.

    By proactively addressing these regulatory considerations, you can avoid delays and complications during the installation process. Local knowledge also empowers you to engage more meaningfully with potential installers, ensuring that your solar project complies with all legal requirements and proceeds smoothly from planning to execution.


Choosing a trustworthy solar panel installer is crucial for a successful and reliable solar energy system. By considering certifications, local expertise, and transparent practices, homeowners and businesses in London and the South East can confidently embark on their journey towards sustainable and cost-effective energy solutions.

Make an informed choice and let your solar investment shine. Tarven Solar Energy is here for you with an expert team that boasts 12+ years’ experience in the industry. We have successfully completed 8000+ projects in and around your region and understand the laws and regulations of your locale. Contact us today to set the process in motion!