Black solar panels integrated into a tiled roof

Choosing Solar Panels: A Practical Buying Guide

Choosing solar panels is about finding a suitable complete system for your roof and electricity use. This page originally covered a 2024 shortlist. Product ranges have moved on, so a historical ranking should not decide a current installation.

Start with roof fit

Compare exact panel dimensions and the usable roof area after allowing for access, edges and obstructions. A higher wattage panel may also be physically larger. The number that fits can matter more than a single panel’s headline rating.

Compare annual output, not just peak watts

Ask for a generation forecast based on the property’s location, orientation, pitch and shade. Module efficiency is useful where space is constrained, but annual kWh and installation cost are more useful for comparing complete proposals.

Read our solar panel efficiency guide and peak-output explanation.

Check the inverter pairing

Voltage, current and approved compatibility matter alongside panel wattage. Ask why the proposed string inverter, hybrid inverter, microinverters or optimisers suit your roof. Compare any forecast clipping and shading benefit.

Read the warranty terms

Distinguish product cover from the performance warranty. Check registration requirements, exclusions, the claims route and whether labour or roof-access costs are included. A long headline warranty is not a guarantee of unchanged output.

Compare the whole quotation

Include mounting, scaffolding, electrical work, monitoring, commissioning and aftercare. Review expected self-consumption and export assumptions. Our Edinburgh solar cost guide explains quote scope.

Manufacturer datasheets and a property assessment are stronger evidence than an undated “best panel” award. We will explain the equipment proposed for your project and the reasons behind the choice.

Solar design for your property

Renew-Able Solutions assesses roofs and electricity use across Edinburgh, East Lothian and wider Central and East Scotland. Explore our solar PV installation service or contact us for an assessment.

Reviewed 27 September 2026.