... --+80°C ,accuracy ±1°CProtection GradeIP26 ProtectionSolar panel reverse-charge protection, Solar panel reverse-connect protection, Battery reverse-connect protection, ... 26-30(27.0)vunload start current (default)25ASolar panel Max power(12v/24v)150/300wMax open voltage(12v ... /24v)120/240 wOutput waylight sensitive switch, timing switch Controller software is optional, you can view system working status ...