Every Panel Brand Compared: 2026

Which is the best solar panel brand in the UK?

Every major solar panel brand available in the UK, compared on 6 metrics: BEST VALUE: LONGi Hi-MO 6 — 21.5% efficiency, 400-430W, 25yr warranty, £240-£280/panel trade. Best kWh per pound spent. BEST EFFICIENCY: SunPower Maxeon — 22.8%, 400-420W, 40yr warranty, £380-£450/panel. Premium but unmatched performance. BEST MID-RANGE: REC Alpha Pure-R — 22.3%, 430W, 25yr warranty at 92%, £300-£350/panel. Excellent balance. BEST BUDGET: JA Solar DeepBlue 4.0 — 21.3%, 420-435W, 25yr warranty, £220-£260/panel. Lowest cost per watt. OTHER BRANDS: Trina Vertex S+ (21.8%, £250-£290), Canadian Solar HiKu7 (21.4%, £230-£270), Jinko Tiger Neo (22.0%, £260-£300). RANKING BY 25-YEAR VALUE (lifetime kWh per £ invested): (1) JA Solar, (2) LONGi, (3) Trina, (4) Canadian Solar, (5) Jinko, (6) REC, (7) SunPower. Note: SunPower ranks last on value-per-pound but first on efficiency and warranty length. For limited roof space, SunPower generates more kWh per m². Sources: Manufacturer datasheets (2026 specifications), UK distributor pricing (Segen, Midsummer Energy), PV Magazine independent testing, MCS product directory.