GWL/Power MPPT Solar Regulator 12/24 V, Tracer 20A Manual GWL-REG1224-20ME-Tracer-20A-Manual.pdf for 12V: 12V x 20A = max 240 Wp of the solar panels for 24V: 24V x 20A = max 480 Wp of the solar panels
GWL/Power MPPT Solar Regulator 12/24 V, Tracer 45A Manual GWL-REG1224-45ME-Tracer-45A-Manual.pdf for 12V: 12V x 45A = max 540 Wp of the solar panels for 24V: 24V x 45A = max 1080 Wp of the solar panels