Solar energy has moved firmly into the mainstream. With rising electricity costs, smarter tariffs and better technology, more homeowners and organisations are asking serious questions about solar panels and battery storage.
Below, we answer the most searched questions on the internet about solar PV systems and batteries – the same questions our team at SolarTherm UK deal with every day.
How do solar panels work?
Solar panels use photovoltaic (PV) cells to convert daylight into electricity. This electricity is used in your home first, reducing your reliance on the grid. Any surplus can be exported or stored in a battery for later use.
Do solar panels work in the UK?
Solar panels work efficiently in the UK and generate even on cloudy days. While output is lower in winter, long summer days typically produce surplus energy, making solar viable year round.
How much electricity will solar panels generate?
Generation depends on system size, roof orientation and pitch, shading and location. A typical UK home system can generate 3,000-4,000 kWh per year, covering a significant portion of household electricity demand.
What size solar PV system do I need?
The size of the system you need with depend on your annual electricity usage, your daytime consumption patterns and whether you plan to add battery storage or have an EV. At SolarTherm UK we design your system around real usage data, not generic package sizes and tailor them to your property, usage and future energy needs.
Do I need planning permission for solar panels?
In most cases planning permission is not required. Solar panels fall under permitted development rights for residential properties. Exceptions apply if your home is a listed building or in a conservation area.
How long do solar panels last?
Modern solar panels last a minimum of 25 years, with many going on to perform effectively for 40 years or more. Performance gradually reduces over time, but quality panels continue producing long after the warranty expires.
What maintenance do solar panels require?
Solar PV systems have no moving parts so require minimal maintenance. At SolarTherm UK we recommend periodic visual checks and regular cleaning, with a system maintenance check carried out by a professional every 3-5 years. Monitoring software usually alerts you to any performance issues, reducing downtime for repairs.
Will solar panels reduce my electricity bills?
Solar panels reduce the amount of electricity you need to import for the grid. With rising energy prices, the value of self-generated electricity continues to increase, with most homeowners seeing up to 80% reduction in their electricity bill.
What happens to excess solar energy?
Any electricity that you do not use in your property or store in a solar battery, is exported back to the grid. The Smart Export Guarantee (SEG) pays you for surplus electricity that is exported.
What is a solar battery?
A solar battery stores unused solar electricity generated during the day so it can be used later – in the evening, overnight or during peak tariff periods.
Do I need a battery with solar panels?
While not essential, the benefits of battery storage are becoming increasingly clear. Battery storage increase self-consumption, further reducing your reliance on the grid. A solar battery also gives you access to smart tariffs, allowing you to benefit from cheaper off peak electricity that you can use to charge your battery and use during high rate periods.
Can I add a battery to an existing solar system?
Many batteries can be retrofitted to existing solar PV systems, even those installed years ago.
What size battery do I need?
Battery size depends on daily electricity usage, solar generation and whether you want partial or maximum grid independence. Oversizing isn’t always cost effective, correct sizing is key. At SolarTherm UK we recommend choosing a battery that covers your daily electric demand, especially that used during peak rate periods.
Can batteries charge from the grid?
Batteries can be charged from the grid and it is recommended that you research for the best time of use tariff. Charging your battery on cheaper overnight tariffs for use during expensive peak periods, can save you money and make your energy system more efficient.
Will a battery power my home during a power cut?
Some batteries can provide backup power, but this requires specific configuration and hardware. Backup capability should always be discussed at the design stage. In the UK, most areas experience low levels of grid failure, requiring minimal backup, usually a single socket to allow you to charge devices or run a light will suffice.
How long do solar batteries last?
Most modern lithium batteries last 10-15 years or thousands of charge cycles. Performance depends on usage patterns and depth of discharge.
Are solar batteries safe?
When installed by an accredited installer, battery systems are safe. Battery systems must meet strict UK safety standards and be correctly located and ventilated.
What happens when the battery is full?
Once the battery is fully charged, electricity is used in the home or can be diverted to other loads such as EV chargers or hot water systems. Surplus electricity can be exported to the grid, or you battery can be discharged to the grid.
Should I install more panels or a bigger battery?
It depends on roof space, usage patterns and tariffs. Often, maximising solar generation first provides the best long term value. The best solar PV results are seen when your solar PV system is sized correctly for your property.
Can I charge an electric vehicle with solar batteries?
Solar compatible EV chargers allow excess solar electricity to be diverted directly into your vehicle. Smart chargers can be programmed to automatically charge your EV when there is surplus solar power available.
Are solar panels and batteries worth it?
For most households, yes. With rising energy prices, smart tariffs and falling technology costs, solar and battery systems offer:
- Lower bills
- Energy security
- Long term protection from price volatility
Why Choose SolarTherm UK?
SolarTherm UK is a long established, experienced solar installer with a proven track record across residential, commercial and education sectors. Every system is:
- Properly designed
- Professionally installed
- Fully compliant
- Built for long term performance
We believe solar works best when it’s done properly, not rushed or oversold.
Thinking about Solar or Battery Storage?
If you’re considering solar panels, battery storage or upgrading an existing system, speak to a team that understands real world installations, not just sales figures.
Contact SolarTherm UK today for a free, no obligation quote and design, tailored to your property, usage and future energy needs. No hard sell, just honest, expert advice.
Your home. Your energy. Your future.
