Solar Panel Installation Timeline: What Happens from Survey to Switch On

Most homeowners researching solar panels know that the installation itself takes one or two days on the roof. What they often do not know is what happens before and after that installation day, how long the full process takes from initial enquiry to actually generating electricity, and what they need to do at each stage. This guide walks through the complete timeline of a residential solar PV installation in Scotland so you know exactly what to expect when you book a survey.

The full timeline at a glance

For a typical Aberdeenshire residential installation, the full process from initial enquiry to system switch on takes 4 to 8 weeks. The breakdown:

• Initial enquiry to survey appointment: 1 to 2 weeks.
• Survey to written quote: 2 to 5 working days.
• Quote acceptance to installation date: 2 to 4 weeks.
• Installation: 1 to 2 days.
• Commissioning, certification, and SEG registration: a few days to 2 weeks.

The longest single block is usually the wait between quote acceptance and installation, which is driven by Faithful Spark’s installation schedule, scaffold availability, and equipment lead times. Larger or more complex installations can take longer at this stage. The actual installation work is short compared with the planning and certification work either side of it.

Step 1: Initial enquiry and free survey

The process starts when you contact Faithful Spark to request a survey. This can be by phone, email, or via the website contact form. The information we typically need at this stage:

• The property address.
• Approximate annual electricity consumption (the most recent annual statement from your supplier is ideal).
• What you are interested in: solar only, solar plus battery, solar plus EV charger, or a combination.
• Any specific concerns or constraints (listed building, conservation area, recently retiled roof, planned roof work, etc.).

A survey appointment is then booked, typically within 7 to 10 working days. The survey takes 60 to 90 minutes at the property. Faithful Spark assesses:

• The roof: orientation, pitch, available area, condition, structural type, and any obstructions or shading.
• The electrical supply: existing consumer unit capacity, single phase or three phase supply, available space for an inverter and battery.
• The household: typical consumption pattern, daytime occupancy, plans for an EV or heat pump in the next few years.
• Any planning or conservation considerations specific to the property.

The survey is free with no obligation to proceed. We provide an initial verbal indication of suitability and likely system size at the visit.

Step 2: System design and written quote

After the survey, Faithful Spark prepares a system design and written quote. This typically takes 2 to 5 working days. The design includes:

• Proposed panel layout on the roof, with panel count and total system capacity in kWp.
• Inverter specification matched to the array.
• Battery storage option (if requested).
• Estimated annual electricity generation calculated using the MCS methodology.
• Estimated annual financial return based on your consumption pattern and current SEG rates.
• All equipment, mounting, scaffold, certification, and grid notification costs.
• VAT confirmation (0% on qualifying residential solar and battery storage until March 2027).

The written quote is fixed price for the specified system. There are no hidden extras: scaffold, Electrical Installation Certificate, and grid notification are all included. You have time to consider the quote, ask follow up questions, and request adjustments to the specification before deciding.

Step 3: Quote acceptance and installation booking

Once you accept the quote, an installation date is booked. The lead time depends on the time of year and the complexity of the project. Typical lead times in Aberdeenshire:

• Standard residential solar in spring or autumn: 2 to 3 weeks.
• Standard residential solar in summer (peak season): 4 to 6 weeks.
• Solar plus battery installation: 3 to 5 weeks (slightly longer due to battery procurement).
• Larger 6kWp+ systems or complex multi pitch installations: 4 to 6 weeks.

During this lead time, Faithful Spark orders the equipment, schedules the scaffold company, and submits the G98 grid notification to SSEN where required (for systems above 3.68kW single phase). The G98 notification process is quick and runs in parallel with the installation preparation, so it does not delay the installation date.

If the property requires a planning application (for listed buildings or conservation areas), this is handled at this stage and may extend the lead time by 4 to 8 weeks while the application is determined by Aberdeenshire Council or Aberdeen City Council.

Step 4: Installation day

The installation itself typically takes 1 to 2 days. A standard 4kWp residential installation is usually completed in a single day. Larger systems or installations involving battery storage and significant internal cabling typically take 2 days.

The installation day timeline:

• 08:00 to 09:00: Scaffold erection and tools delivered. Faithful Spark team arrives and confirms the working areas with the homeowner.
• 09:00 to 12:00: Roof access established. Mounting rails fitted to the roof. Panels delivered to roof level.
• 12:00 to 14:00: Panels mounted and electrically interconnected. DC cabling routed from the array to the inverter location.
• 14:00 to 16:00: Inverter mounted and AC connection routed to the consumer unit. Battery installed if part of the package.
• 16:00 to 17:00: System energised, commissioning tests carried out, monitoring app set up with the homeowner, system handover.

Disruption to the household is minimal. The exterior work makes some noise during scaffold and panel installation. The interior work is brief and confined to the inverter location and the consumer unit. There is typically a short power outage of 30 to 60 minutes when the system is connected to the consumer unit.

Step 5: Commissioning and certification

At the end of the installation, the system is energised and tested. Faithful Spark runs through commissioning tests including insulation resistance, polarity verification, earth continuity, and live performance checks. The homeowner is shown the monitoring app, the inverter status display, and the manual isolation procedure.

The certification documents issued at handover:

• MCS installation certificate: This is the document required for the SEG application.
• Electrical Installation Certificate: Issued under NICEIC registration covering the AC electrical work.
• System design specification and generation estimate: The expected annual generation and panel layout.
• Manufacturer warranty cards: For panels, inverter, and battery (if applicable). Faithful Spark registers the warranty with the manufacturer at commissioning.
• G98 notification confirmation: Where applicable, confirming the installation has been notified to SSEN.

The MCS certificate is registered on the public MCS database, which is the source the homeowner’s electricity supplier checks during the SEG application.

Step 6: SEG application and switch on

With the MCS certificate in hand, the homeowner applies to their chosen electricity supplier for a Smart Export Guarantee tariff. This is a separate process from the installation and is initiated by the homeowner. The supplier verifies the installation against the MCS database and sets up the export tariff. Most suppliers complete the SEG application within 2 to 4 weeks of submission.

The solar system itself is fully operational from the moment of commissioning at the end of installation day. SEG payments only begin once the supplier confirms the export tariff, but the bill savings from self consumption start immediately. There is no need to wait for SEG approval before using the system.

For more on the SEG process and how to choose the best export tariff, see our guide on the Smart Export Guarantee in Scotland. For more on what MCS certification covers, see our guide on MCS certified solar installers in Scotland.

After installation: monitoring and support

The system is designed to be largely self managing. The inverter monitoring app tracks generation, consumption, and (where applicable) battery state. Faithful Spark provides ongoing support for any questions, fault investigation, and any future upgrades such as adding battery storage or an EV charger to the original solar installation.

Frequently asked questions

Can I speed up the timeline if I need solar urgently?

Some elements can be accelerated. The survey can usually be brought forward to 2 to 5 working days if Faithful Spark has availability. The written quote can be turned around within 1 to 2 days. The installation lead time depends on equipment availability and scaffold scheduling, which are harder to compress. The full process can typically be completed in 3 to 4 weeks for a standard installation if all parties prioritise.

Do I need to be at home for the installation?

Someone needs to be at the property at the start of the day to confirm working areas and provide internal access for the inverter installation and consumer unit work. After the initial 30 to 60 minutes, the work is mostly external. Many homeowners attend the start, leave for the working day, and return in the afternoon for the commissioning and handover.

What if the weather is bad on the planned installation day?

Roof work in heavy rain or high wind is unsafe and not permitted by the scaffold safety regulations. Faithful Spark monitors the forecast in the days before installation. If the weather is forecast to make safe roof work impossible, we contact the homeowner to reschedule, typically to within a week of the original date.

When do I pay?

The standard payment terms are a 25% deposit at quote acceptance, with the balance due on completion of installation. For larger projects, an additional progress payment may be agreed at the equipment delivery stage. The deposit is protected under the consumer code Faithful Spark is a member of, which provides deposit insurance against installer insolvency.

Will my electricity supply be off all day?

No. The supply is interrupted only briefly when the AC connection from the inverter is made into the consumer unit, typically for 30 to 60 minutes in the afternoon. This is timed to minimise disruption and the rest of the working day proceeds with normal electricity supply.

Book your free solar survey in Aberdeen or Aberdeenshire

Faithful Spark carries out free solar surveys across Aberdeen and Aberdeenshire and provides a written quote with no obligation. See our full guide to solar panel installation in Aberdeen for more on our standards and approach.

Book My Free Solar Survey

Faithful Spark Electricians. NICEIC approved. Local Aberdeen team. Serving Aberdeen, Peterhead, Ellon, Fraserburgh and across Aberdeenshire.