When Is the Best Time to Get Solar Panels in Scotland?
Solar price analysis by the Solar Installers Scotland team | Updated March 2026
Quick Answer
The best time is now — before the 0% VAT deadline in March 2027. Installing before this date saves you £1,200-£2,200 in VAT alone. Beyond the tax incentive, every month of delay costs you £45-£65 in electricity savings you are not making. For the shortest waiting times, autumn and winter bookings are 4-6 weeks faster than spring/summer.
The 0% VAT Deadline: Your Biggest Financial Incentive
0% VAT on Solar Ends
31 March 2027
After this date, 20% VAT applies to all residential solar installations
£1,200
VAT saving on a £6,000 system
£1,600
VAT saving on an £8,000 system
£2,200
VAT saving on an £11,000 system with battery
Why you need to act well before March 2027
As the deadline approaches, installer waiting lists will grow significantly. In the months before the Feed-in Tariff ended in 2019, waiting times stretched to 6+ months. We expect similar demand surges in late 2026 and early 2027. To guarantee installation before the deadline:
- •Start getting quotes by September 2026 at the latest
- •Confirm your installer by November 2026
- •Schedule installation for January-February 2027
- •Starting now gives you the most flexibility and choice
Seasonal Demand: When Are Installers Busiest?
Spring (Mar-May)
Peak demand. Longest wait times (8-12 weeks). Homeowners motivated by longer days and approaching summer. Book early or expect delays.
Summer (Jun-Aug)
High demand. Still busy (6-10 weeks). Best weather for installation but higher prices due to demand. Some installer holiday closures.
Autumn (Sep-Nov)
Best value window. Shorter wait (4-6 weeks). Installers more flexible on pricing. System ready for winter/spring generation.
Winter (Dec-Feb)
Quietest period. Fastest bookings (3-5 weeks). Best negotiating position. Installation is fine in cold weather — panels actually perform better when cool.
From First Quote to Working System: The Timeline
Week 1-2: Get and Compare Quotes
Request quotes from 3-4 MCS-certified installers. Most provide initial quotes within 3-5 working days based on your address and electricity usage. Compare like-for-like on panels, inverter, and warranty.
Week 2-3: Choose Installer and Pay Deposit
Select your preferred installer, confirm the specification, and pay the deposit (typically 10-25% or £500-£1,500). This secures your place in their installation schedule.
Week 3-4: Site Survey
An engineer visits your home to confirm roof suitability, structural integrity, wiring capacity, and optimal panel placement. The survey takes 1-2 hours. Any design adjustments are finalised here.
Week 3-6: DNO Notification (Parallel Process)
Your installer notifies the Distribution Network Operator (Scottish Power or SSE) of the planned installation. This happens in parallel with other steps and takes 2-4 weeks. No action needed from you.
Week 4-12: Installation Day (1-2 Days)
The installation itself takes just 1-2 days for a standard system. Scaffolding goes up in the morning, panels and inverter are installed, wiring is completed, and the system is commissioned and tested. You have solar power by end of day.
Week 5-14: MCS Certification and SEG Registration
Your installer completes the MCS certification (mandatory) and you register for the Smart Export Guarantee to earn money from exported electricity. This process takes 1-2 weeks after installation.
Strategic Timing for Different Situations
Planning home renovations
If you are re-roofing, adding an extension, or upgrading electrics, coordinate solar installation with these works. You save on scaffolding costs (£300-£600) and can run wiring during the renovation rather than retrofitting.
Buying an EV in the next 12 months
Install solar before the EV arrives. Size the system to include EV charging capacity now — adding panels later costs significantly more due to return scaffolding and inverter upgrades. A 6-7kWp system covers both home and typical EV charging.
Considering a heat pump
Solar and heat pumps are the perfect combination. Install solar first as the savings help offset heat pump running costs. Size your system at 5-6kWp minimum to support both home electricity and heat pump consumption.
Selling your home within 2-3 years
Solar panels add £4,000-£8,000 to property value according to recent studies. Even with a short ownership period, the combination of 2-3 years of savings plus increased property value typically exceeds the installation cost, especially with 0% VAT.
Your Action Plan: What to Do This Week
- 1
Check your annual electricity usage
Log into your energy supplier account or check your smart meter. Note your annual kWh consumption.
- 2
Look at your roof from the street
Note which direction your main roof slopes face (south, east/west), any shading from trees or buildings, and visible obstructions like dormers.
- 3
Request 3-4 quotes from MCS-certified installers
Use our comparison tool to get matched with vetted, local installers. Quotes are free and take 3-5 working days.
- 4
Compare quotes and ask questions
Use our after-getting-quotes guide to compare like-for-like and make a confident decision.
Takes 2 minutes. No obligation. MCS-certified installers only.