Review design packages, installation standards, and commissioning procedures for compliance with project and DNO requirements., Inspect installation quality for PV arrays, inverters, combiner boxes, transformers, switchgear, cables, and SCADA systems., Ensure all equipment is installed according to UK electrical standards, OEM manuals, and safety regulations., Verify HV/MV installation readiness for energisation, including substations, RMUs, switchgear, and protection systems., Lead onsite commissioning activities for all solar electrical systems, including string testing, IV curve testing, inverter commissioning, HV/MV cable tests, transformer tests, protection relay testing, and SCADA validation., Coordinate with DNOs/ICPs for energisation, witnessed tests, and grid compliance (G99)., Identify, troubleshoot, and resolve commissioning issues such as communication faults, inverter trips, protection issues, and performance deviations., Validate system performance, including PR, voltage regulation, reactive power capability, and plant controller operation., Ensure successful completion of G99 commissioning tests and all DNO‑required checks., Produce commissioning documentation, test reports, redlines, and handover packages., Support PAC/FAC milestones and close out punch‑list items.