FAQ for Residential Clients

These are some of the frequently asked questions. If your question is not here then email info@thegreenwaysolar.co.uk

Why would I install solar panels on my home?

There are lots of good reasons to use solar panels.

You will be:

  • safe from load-shedding
  • saving money on your electricity bills by reducing your dependence on expensive grid energy
  • helping to reduce the production of carbon dioxide and other greenhouse gases
  • earning money in the long run

What are is solar PV system? Don’t they only work in the summer?

Photovoltaics (often abbreviated as PV) is a simple and elegant method of harnessing the sun's energy.

Solar panel electricity systems, also known as solar photovoltaics (PV), capture the sun's energy using photovoltaic cells. These cells don't need direct sunlight to work – they can still generate some electricity on a cloudy day. The cells convert the sunlight into electricity, which can be used to run household appliances and lighting.

Do I really need a battery? Can’t I just have Solar?

Solar PV on its own will make a difference to your energy mix, saving you money and reducing your carbon footprint. However in most situations it is very difficult to optimise the self-consumption of the energy that has been generated without the use of additional technology such as batteries, immersion controllers or certain EV chargepoints. Remember, without the additional tech you can only consume the energy in the instant that your Solar PV array generates it, if you don’t use it you export it for a fraction of the cost of buying it back later.

What is an inverter?

Solar inverters, also called grid-tied inverters, convert the direct current (DC) electricity produced by your solar PV panels to alternating current (AC) electricity that can be used in your home and exported back to the grid.

Solar invertors also:

  • ensure compliance with regulations about feeding electricity into the grid, for example by immediately disconnecting if there is a power cut
  • maximise electricity production by constantly varying its resistance (load)

An inverter is an important integral part of your solar system. It’s like a control center for the system.

Do solar panels need to be maintained?

Solar PV needs little maintenance – you'll just need to keep the panels relatively clean and make sure trees don't begin to overshadow them.

How long does a system last?

Panels have a performance guarantee of 25 years and could even last longer. Inverters have complex electronics and we provide for replacement of inverters every 10 years or so as technology improves these get better and cheaper. Batteries can last anywhere between 5 and 15 years depending on how the system is configured. As a rule of thumb, the more electricity used during the daytime the longer the batteries will last.

I already have solar hot water system. Can this system also produce electricity or be integrated with a solar PV system?

No, these systems are different. Solar hot water systems use the heat from the sun. Solar electricity uses sunlight. Solar Photovoltaic (PV) is a technology that uses sunlight to generate direct current (DC) electricity. Solar hot water panels usually have copper pipes running through them filled with water.

What is the difference between kWp and kWh?

A kWp is the kilowatt ‘peak’ of a system. This is a standardised test for panels across all manufacturers to ensure that the values listed are capable of comparison.

When the solar PV panels are working they will over an hour convert the suns irradiance into energy, which is measured in kilowatt hours (kWh). A 3kWp PV system which is working at its maximum capacity (kWp) for one hour will produce 3kWh.


Unit 3A Broughton Grounds Business Park,
Broughton Grounds Lane,

Telephone: 01908 915 565
Email: info@thegreenwaysolar.co.uk

Telephone: 01908 915 565
Email: info@thegreenwaysolar.co.uk