Solar PV FAQ

If you are new to Solar PV you probably have a few questions that need answering. Here are a few answers.

Solar FAQ

Frequently Asked Questions

My roof doesn't face South, does that matter?

No, although it is best if your roof faces south you easily generate electricity from  a roof facing in most directions. When you get a free survey your surveyor will be able to advise you on the estimated generation figures for your property using the Ofgem figures.

How many solar panels do I need?

There are a few things that define how many panels you need. The available roof space and your lifestyle are important. Our surveyor will measure your roof and calculate your energy usage to make sure it's suitable.

Can I see how much electricity I have generated?

Yes, there are several ways you can do this. Everyone who has a solar installation gets a generation meter. Much like an electricity or gas meter this gives basic information and a lifetime generation figure.
If you have an Enphase or SolarEdge installation you will get access to detailed generation statistics online or on an App for your smart-phone. This allows you to see exactly what your solar system is doing.

How long will my system last?

The panels have at least a 25 year, 80% output warranty but they will continue working after that. Sunpower panels have a useful life of 40 years as they degrade by just 0.25% per year.

What is an EPC and do I need one?

An EPC is an Energy Performance Certificate that assesses how energy efficient your home is.
The requirement for an EPC of D or above has been lifted. The Smart Export Guarantee (SEG) does not have any energy efficiency requirements.

What is the Smart Export Guarantee??

The Smart Export Guarantee is a new system whereby energy companies (of more than 150,000 customers) must pay solar power generators for putting excess electricity back into the Grid. The payment will differ from one company to another and may be paid based on the current energy wholesale price. You will need to have a smart meter to measure how much electricity you supply to the Grid.

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