What about this controller?
PWM Solar Charge Controller USB 20A LCD Fully 4-Stage PWM Charge Management for Max 50V 480W Solar Panel RTD-20A NEW Regulator
PRODUCT FEATURESHigh accuracy control by advanced microprocessor
4-Stage intelligent PWM charging with temperature compensation
External true ambient temperature sensor
1.Build-in industrial micro controller.
2.Big LCD display,with 5V USB charger
3. PWM charge management.
4.Build-in short-circuit protection,open-circuit protection,reverse protection,over-load protection.
5.Dual mosfet Reverse current protection ,low heat production.
