REC Alpha Pure-RX 460W Solar Panel vs Canadian Solar CS6.1-54TM 450W Panel

The REC Alpha Pure-RX is the stronger panel: higher wattage, slightly higher efficiency, lower annual degradation (0.25% vs. TOPCon's typical curve), better heat performance at -0.24%/K, and a labor-inclusive warranty. The Canadian Solar CS6.1-54TM is a solid all-black TOPCon module with a slightly thicker 35 mm frame and a higher current output that suits string inverters. Buy the REC if you want maximum output per square foot, microinverter compatibility and the best long-term warranty; buy the Canadian Solar if your inverter is sized for higher current and you want a well-known budget-friendly brand.

• Choose the REC Alpha Pure-RX if you have limited roof space, plan microinverters or DC optimizers, or want the lowest degradation and a warranty that covers labor.
• Choose the Canadian Solar CS6.1-54TM if your inverter or string design handles 14A+ input current and you want a proven all-black TOPCon panel with a thicker frame.