for Waveshare Solar Power Manager Module (D), Supports 6V~24V Solar Panel
SOLAR IN6V ~ 24V (6V by default) 6V ~ 24V (18V by default) 6V ~ 24V. SOLAR POWER MANAGER. SOLAR POWER MANAGER (B). SOLAR POWER MANAGER (C). SOLAR POWER MANAGER (D). SOLAR PANEL RECHARGING EFFICIENCY~78%.