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Pillar guide

The UK solar installation process

An honest, step-by-step walkthrough — from first enquiry to first export payment.

  1. 01

    Initial enquiry & desktop survey

    Installer reviews your roof on satellite imagery, sizes a system to your annual consumption (kWh/year from your latest bill) and provides an indicative quote within 24–72 hours.

  2. 02

    On-site survey

    30–60 minute visit covering roof structure, pitch, orientation, shading analysis (Solmetric/Solar Pathfinder), consumer unit capacity, cable routing and inverter location.

  3. 03

    Formal quote & contract

    Itemised quote including panels, inverter, battery (if chosen), scaffolding, MCS certification and DNO notification. 14-day Consumer Contracts Regulations cooling-off period.

  4. 04

    DNO notification

    G98 (for systems ≤3.68kW per phase) submitted by installer; G99 for larger or 3-phase systems requires DNO approval before install (4–8 weeks).

  5. 05

    Scaffolding

    Erected 1–2 days before roof work. Highway licences required if scaffolding overhangs the pavement (3–7 day council lead time).

  6. 06

    Installation

    Day 1: roof hooks, rails, panels, DC cabling. Day 2: inverter, AC cabling, isolators, battery, generation meter, commissioning.

  7. 07

    Commissioning & handover

    Inverter commissioned, app set up, customer walked through monitoring. MCS certificate issued within 10 working days; required for SEG registration.

  8. 08

    SEG registration

    Apply with your chosen export-tariff supplier (Octopus, E.ON Next, OVO etc.) using the MCS certificate. Payments typically start within 4–6 weeks.

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Frequently asked questions

01.How long does a solar installation take?

A typical 4kWp residential install takes 1–2 days on the roof, with scaffolding up for 3–4 days. From signed quote to commissioning is usually 4–8 weeks including DNO notification.

02.Do I need to be home for the install?

Yes for at least part of the commissioning day, when the installer commissions the inverter, walks you through the monitoring app and provides handover paperwork.

03.Will the installer notify my DNO?

Yes — a reputable installer files G98 (for systems ≤3.68kW per phase) or G99 (larger systems) on your behalf. Insist on a copy of the notification confirmation.