How Long Does it Take to Install Solar Panels on a Roof

How Long Does it Take to Install Solar Panels on a Roof

Solar panels are not only cost effective they are a great investment and renewable energy solution for your home. There are two types of solar panels – solar thermal panels for producing hot water and solar PV panels for producing electricity.

The solar installation process:

  • Initial enquiry by e-mail/telephone
  • You should be contacted within 24 hours and an initial assessment of your property’s suitability for your chosen technology
  • Following an initial assessment the installer will carry out an on-site survey
  • A fully detailed quotation should be provided at this point.
  • Upon agreeing to terms you will receive an installation date for your system, usually within 3-4 weeks
  • The scaffolding is usually erected the previous day to installation
  • Installation usually takes 2-3 days, with disruption kept to a minimum
  • After installation the system will be commissioned & tested.
  • All scaffolding will be removed and your property left clean and tidy

The roof’s existing structure should be assessed at survey to determine whether any additional strengthening will be required, and any accidental damage to the titles or slates must be repaired prior to installation.

Installations should have 5 years installation warranty. Panels are typically guaranteed from failure for 5-10 years, depending on the manufacturer. They are also guaranteed for 25 years to give 80% of their output. All inverters are guaranteed for 5 years standard (this can be increased for up to 25 years at additional cost)

Frequently Asked Questions on Solar

Is my roof suitable for solar installation?

A pitched or flat roof is suitable, as long as it is within 90 degrees of south facing. Angled ‘A’ frames can be installed to flat roofs without fixing through the membrane, to allow panels to be installed to the correct angle.

How long will solar installation take?

Installation for solar PV and solar thermal typically takes 2-3 days, depending on the size of installation. However getting a date for the installation might take 3-4 weeks Scaffolding will usually be required and is usually done a day before the installation.

Do I need planning permission?

No, as long as the solar PV or solar thermal panels are installed on the roof of your property. It would only be required if you are in a conservation area, are installing on a listed building or installing solar panels away from your property.

How much will a Solar PV installation cost?

For a standard domestic system we would normally install a system that is between 2 and 4 kWp. This would cost you between around $15,000 and $20,000. Generally solar PV systems will offer you a return on investment of between around 12-15%.

How much will a solar thermal installation cost?

A typical evacuated tube panel which will meet the requirements for a 2-3 person household, fully installed cost including cylinder and VAT will cost from $5000 subject to site survey.

What is the typical payback time?

The typical payback time would be in approximately 6-10 years. After this time the remaining 15-19 years would be profit – this does not allow for future energy price increases, which would mean payback time would be reduced.

Is ongoing maintenance required for Solar?

Solar PV has no moving parts so maintenance is minimal. Solar panels are guaranteed by the manufacturer for 10 years, based on a performance of 90% of their original power output, and for up to 25 years after installation, based on a power output of 80%. There are solar PV installations approximately 40 years old that are still going strong!! Inverters are guaranteed by the manufacturer for 5 years, with an option to extend for up to 10 years.

Will My Property Value Increase with the Installation of Solar Panels?

Studies have shown people will pay up to $20,000 more for a property installed with renewable energy i.e. Solar PV. Your property will be more attractive to potential purchasers as it will have lower running costs.

What is the Difference between Solar PV and Solar Thermal?

Solar PV panels produce electricity, which when linked to the national grid through and inverter provide you with approximately 50% saving on your electricity bill, and a yearly income through Feed-in-Tarrifs. Solar thermal panels are used to heat the water in your hot water cylinder and can provide you with approximately 60% of your yearly hot water needs.

Will a Solar Panel Produce Electricity on a Cloudy Day?

Yes, even on a cloudy day there will be enough diffused light for the solar panels to produce electricity. However, the production of electricity is not as high as when the panels are placed in bright sunlight.

Will Solar Panels work when it’s cold or in winter?

Yes, Solar Panels will work equally as well on a cold day as solar PV panels work on light not heat.

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