How the Installation Process Works

A solar installation involves five main stages: survey, system design, DNO notification (for systems above 3.68kW), installation, and commissioning. From survey to a working system typically takes 4–8 weeks, with DNO approval often the longest step.

1. Survey

A surveyor visits to assess your roof orientation, pitch, structural condition, shading, and existing electrical installation. This takes 45–90 minutes. We check whether your consumer unit has capacity for the system and whether any upgrades are needed, and confirm scaffolding requirements.

2. System design

Based on the survey data and your energy consumption, we size the system, select the panel layout, inverter, and battery if applicable, and produce a design document for your approval. This includes shading analysis and a generation estimate.

3. DNO notification

Systems above 3.68kW require a G98 or G99 notification to your Distribution Network Operator. G98 is a standard notification that proceeds automatically unless the DNO objects within 20 working days. G99 applications require formal approval and can take 8–12 weeks — the most common cause of delays on larger systems.

4. Installation day

For most homes this is a single day. Scaffolding goes up first if required, then panels are mounted, the inverter installed, cables run, and the system connected to the consumer unit. Loft access and access to the consumer unit are needed throughout.

5. Commissioning

The system is tested, the inverter configured, and monitoring set up. You receive the MCS certificate — essential for SEG registration — all documentation, and a handover walkthrough covering the monitoring app and how to read your generation data.