Advanced Solar Installations
Advanced Solar Installations | Solar Installation | Electrical | Winchester
At HEP in Winchester, we transform rooftops and open spaces into high-performance energy hubs. Our team pairs cutting-edge photovoltaic technology with meticulous electrical craftsmanship, delivering a solar installation that blends aesthetics, durability, and maximum output. From the first site assessment to the final meter reading, every component is selected and wired for peak efficiency, so you can watch your energy bills shrink while your property value climbs.
Residents and businesses across Winchester trust us because we handle everything in-house: custom design, permitting, grid integration, and 24/7 system monitoring. Backed by industry-leading warranties and local technicians who arrive when you call, we make clean power effortless and worry-free. Choose HEP for an advanced solar installation that lets the Hampshire sunshine pay your bills—and powers a greener future for our community.
FAQs
How much roof space do I need for an advanced solar PV system in Winchester?
Most homes in Winchester require roughly 6–20 m² of unshaded roof to install a 2–5 kWp system, which is the typical size range for households. A good rule of thumb is 4 m² of clear roof per kilowatt of panels. During our free site survey we measure usable roof area, check orientation and pitch, and design the array so that it maximises generation while meeting local planning guidelines.
Will my existing electrics need to be upgraded for a solar installation?
Often only minor work is needed, such as adding a dedicated solar breaker, generation meter, and a small AC isolator near the consumer unit. Homes with older fuse boards or limited spare capacity may need a new consumer unit or a small sub-board. Our NICEIC-approved electricians complete a full inspection, bring your system up to 18th-edition wiring regulations, and provide the Electrical Installation Certificate (EIC) required by Building Control.
Do I need planning permission or permits in Winchester for solar panels?
In most cases, roof-mounted solar arrays fall under ‘permitted development’ in Winchester, so formal planning permission is not required. Exceptions include listed buildings, homes in conservation areas, or arrays that project more than 20 cm from the roof plane. We handle all paperwork, including the DNO (Distribution Network Operator) G98/G99 notification, and advise if a Householder Planning Application is needed.
How long does the entire installation process take?
From signed proposal to switch-on typically takes 4–6 weeks. The timeline breaks down as follows: (1) site survey and design – 1 week, (2) DNO approval – 2–3 weeks, (3) scaffolding and panel installation – 1–2 days, (4) electrical wiring, inverter and battery fit-out – 1 day, (5) testing, commissioning and customer hand-over – same day. Larger or commercial systems may extend to 8–10 weeks due to additional engineering and permitting steps.
How well do solar panels work in Winchester’s climate?
Despite Southern England’s mixed weather, Winchester receives about 1,700 sunshine hours per year, yielding 900–1,050 kWh of electricity per installed kWp. A 4 kWp system will therefore generate roughly 3,600–4,200 kWh annually—covering 60–70 % of an average household’s needs and saving about 1 tonne of CO₂ each year. High-efficiency panels, optimisers and a smart inverter ensure strong performance even on cloudy days.
What after-sales support and warranties are included?
Our advanced solar packages include a 25-year performance warranty on Tier-1 panels, a 10–12 year manufacturer’s warranty on inverters (extendable to 20 years), and a 10-year workmanship warranty backed by the IWA protection scheme. Remote monitoring via your smartphone is provided at no extra cost, and we perform a free health check in year 2. Optional annual maintenance plans cover cleaning, system diagnostics and firmware upgrades to keep your array operating at peak efficiency.