What questions we usually get about solar services
Should I get a battery system for my solar panels?
Adding battery storage to your solar panel system can significantly increase your energy savings and independence. Batteries allow you to store excess solar energy generated during the day for use in the evening and night, reducing your reliance on the grid. This is especially valuable as electricity prices are typically higher during peak evening hours. With a battery, you can use up to 80% of your solar energy directly, compared to around 30-50% without storage. While batteries add to the initial cost, they can pay for themselves within 8-12 years and provide backup power during outages. Our experts can help you determine if battery storage makes sense for your home and energy usage patterns.
What roof direction is best for solar panels?
South-facing roofs are ideal for solar panels in the UK, as they receive the most sunlight throughout the day. However, southeast and southwest-facing roofs also work very well, typically generating 90-95% of what a south-facing roof would produce. East and west-facing roofs can still be effective, generating around 80-85% of optimal output. North-facing roofs are generally not recommended as they receive significantly less sunlight. If your roof isn't ideally oriented, we can still design an effective system - sometimes using a larger array or optimising panel angles. Our free survey will assess your roof's suitability and recommend the best configuration for maximum energy generation.
Can I install solar panels on a flat roof?
Yes, solar panels can be installed on flat roofs using special mounting systems that angle the panels toward the sun. Flat roof installations typically use ballasted or fixed mounting frames that tilt the panels at an optimal angle (usually 10-30 degrees) to maximise sunlight capture. These systems are designed to be weatherproof and don't require roof penetration, protecting your roof's integrity. Flat roofs can actually be advantageous as they allow for optimal panel positioning and easier access for maintenance. Our engineers will assess your flat roof's load-bearing capacity and recommend the best mounting solution. Planning permission may be required for flat roof installations if the panels exceed certain height restrictions.
What happens if I move house?
Solar panels typically add value to your property, so you can often recoup your investment when you sell. Studies show that homes with solar panels can sell for 3-4% more than similar homes without them. When you move, the solar panel system stays with the property and becomes part of the sale. The new owners will benefit from reduced energy bills and SEG payments. Some mortgage lenders view solar panels as a positive feature. If you're planning to move soon, solar panels can still be a good investment - they're attractive to buyers and can help your property sell faster. We can provide documentation about your system's performance and warranties to share with potential buyers.
What size solar panel system do I need?
The size of solar panel system you need depends on your electricity consumption, roof space, and budget. A typical UK household uses around 3,500-4,500 kWh per year. A 3-4kW system (10-14 panels) can generate 2,500-3,500 kWh annually, covering 60-80% of average household needs. A 5-6kW system (16-20 panels) can generate 4,000-5,000 kWh, potentially covering 100% or more of your usage. To determine the right size, we consider your current electricity bills, roof size and orientation, shading, and whether you want to add battery storage. Our free online quote tool helps you find the perfect system size for your home, and our experts can provide personalised recommendations during your consultation.
Why choose solar panel? Are solar panels worth it?
For many UK homes, solar panels are worthwhile. They can cut hundreds off annual energy bills, shield you from rising electricity prices and reduce your carbon footprint. While installation has an upfront cost, savings and the option to export excess energy mean most systems pay for themselves over time.
Panels also boost property value, and with battery storage, you can make even greater use of your own clean energy.
Do solar panels work in cloudy weather
Yes. Solar panels generate electricity from daylight, not just direct sunlight. On cloudy days, they still produce power, although output is lower than on bright, sunny days. In the UK, panels work all year round, even in winter.
While generation is highest in summer, many homes use batteries to store spare power, helping to smooth out usage and keep savings steady across the seasons, whatever the weather.
Will I need planning permission to install solar panels?
In most cases, you will not need planning permission because solar panels are classed as a permitted development in the UK. There are exceptions, such as if you live in a listed property, a conservation area, or if panels are fitted on a flat roof.
An expert iHeat installer will check these requirements for you and confirm whether permission is needed before your installation goes ahead.