Solar Energy Services by SJG Electrical
At SJG Electrical, we are dedicated to providing top-notch solar energy solutions tailored to meet the unique needs of both domestic and commercial clients. Our comprehensive range of solar services ensures that whether you are a homeowner looking to reduce your energy bills or a business aiming to improve sustainability, we have the expertise and resources to support you.
Domestic Solar Energy Solutions
For our domestic customers, SJG Electrical offers bespoke solar energy systems designed to fit the specific energy requirements of your home. Our team of experienced professionals will guide you through the entire process, from the initial consultation and site assessment to the installation and maintenance of your solar panels. By investing in solar energy, homeowners can significantly reduce their electricity bills, increase the value of their property, and contribute to a greener environment. Our systems are designed for maximum efficiency and longevity, ensuring you reap the benefits for many years to come
Commercial Energy Systems
Our commercial solar energy services cater to businesses looking to harness the power of the sun for their energy needs. We specialise in the installation of 60kW solar systems, ideal for small to medium-sized enterprises. These systems can help businesses lower operational costs, achieve energy independence, and demonstrate a commitment to sustainability. At SJG Electrical, we understand that every business is different, which is why we offer customised solutions that take into account your specific energy consumption patterns and goals. Our team ensures a seamless installation process with minimal disruption to your daily operations.
Industrial Solar Energy Projects
For large-scale industrial applications, SJG Electrical provides robust and high-capacity solar energy systems. Our industrial solar solutions include the installation of 1100kW systems, designed to meet the substantial energy demands of factories, warehouses, and other large facilities. These systems are engineered to deliver reliable and efficient power, helping industries to cut down on their electricity costs and reduce their carbon footprint. With our extensive experience and technical expertise, SJG Electrical is your trusted partner for implementing large-scale solar projects that drive significant energy savings and support corporate sustainability initiatives.
Personalised Customer Service
At SJG Electrical, we believe in building strong relationships with our customers. We listen to your needs and provide personalised solutions that best suit your home and lifestyle. Our friendly and professional team is always ready to offer advice and support, ensuring you receive the highest standard of service from start to finish.
Contact SJG Electrical & Security for all your Solar needs on 01205 870236 and experience the difference of working with a company that truly cares about its customers.
Solar Install
- Victron Solar Panels
- Fully on-grid off-grid based on SOC level,
- 30kva output,
- 15kva charging from generator,
- 40kw solar ground mount,
- 82kwh of battery storage,
- Node-red used in control and fail safe setup.
“We are delighted to share our experience with SJG Electrical and Security, who has consistently proven to be an exceptional partner for our business. From the outset, they have demonstrated remarkable reliability, ensuring that every project is completed on time and within budget. Their services offer incredible value, and we have been consistently impressed by the level of technical advice they provide.
A standout project was the installation of solar PV panels on our warehouse roof. This installation has been a massive benefit to our business, significantly reducing our energy costs and enhancing our sustainability efforts. The expertise and guidance provided by SJG throughout the process were invaluable, ensuring a smooth and efficient transition to solar power.
Their team is not only skilled and knowledgeable but also incredibly supportive and responsive to our needs. We highly recommend SJG to any business seeking reliable, high-quality electrical services and expert technical advice”
Matthew Chamberlain Operations Director
Domestic Solar Installation FAQ’s
1. How will you determine the optimal system size, panel layout, and orientation for my specific roof geometry and energy consumption profile?
A competent contractor should begin with a detailed site-specific assessment rather than offering a generic system size. This includes analysing your historical electricity consumption (ideally half-hourly smart meter data), roof pitch, azimuth (orientation relative to south), and any shading from nearby obstructions such as chimneys, trees, or adjacent buildings.
Expect them to use modelling software (e.g. PVsyst or equivalent) to estimate annual yield (kWh/year) and performance ratio. They should explain trade-offs between maximising generation versus self-consumption, especially if export tariffs are low.
A robust answer will also cover how panel stringing is designed to mitigate mismatch losses and whether optimisers or microinverters are justified for your roof conditions.
2. What inverter topology do you propose, and how does it align with system efficiency, scalability, and fault tolerance?
The contractor should clearly justify whether they recommend a string inverter, hybrid inverter, or microinverter system. String inverters are cost-effective but can suffer from performance losses if panels are shaded or mismatched, whereas microinverters or DC optimisers allow panel-level optimisation and monitoring.
Ask how inverter efficiency curves (Euro efficiency vs peak efficiency) impact real-world performance, and whether the system design allows for future expansion or battery integration.
A technically sound response will also address DC-to-AC ratio (oversizing the array relative to inverter capacity) and how clipping losses are managed.
3. How will the system integrate with my existing electrical installation, and what considerations are made for load balancing and export management?
A high-quality contractor will assess your consumer unit, phase configuration (single-phase vs three-phase), and existing load distribution. They should explain how the solar PV system will connect, typically via a dedicated circuit, and how generation is prioritised for on-site consumption.
Expect discussion of export limitation strategies (if required), dynamic load management, and compatibility with smart home systems or EV chargers. They should also address how the system handles voltage rise on the local network, which can affect inverter performance and export capability.
4. What are the expected performance degradation rates and maintenance requirements over the system’s lifecycle?
Solar panels degrade gradually, typically around 0.3–0.5% per year, but this varies by manufacturer and environmental conditions. The contractor should provide realistic long-term performance projections rather than relying solely on initial peak output figures.
Ask about inverter lifespan (often 10–15 years), potential replacement costs, and monitoring systems that track generation performance and fault conditions. A thorough answer will include cleaning requirements (generally minimal in the UK due to rainfall), as well as how system diagnostics are handled, whether remotely or via periodic inspections.
5. How do you model financial returns, including self-consumption optimisation, energy price assumptions, and payback period sensitivity?
Rather than quoting a simplistic payback period, the contractor should present a nuanced financial model. This should incorporate projected generation, your household’s consumption profile, and assumptions about future electricity prices.
Key variables include self-consumption ratio (how much solar energy you use directly), export rates for surplus electricity, and potential integration of battery storage to improve utilisation.
A rigorous response will include sensitivity analysis, demonstrating how changes in energy prices or usage patterns affect return on investment and should distinguish clearly between nominal and real (inflation-adjusted) savings.
