Morningstars ProStar is the worlds leading mid-range solar controller for both professional and consumer applications. This second generation ProStar: * Adds new features and protections using highly advanced technology * Provides longer battery life and improved system performance * Sets new standards for reliability and self-diagnosticsFeatures * Versions available: 15 or 30 amp, 12 / 24 or 48 volt, negative or positive ground * Estimated 15 year life * PWM series battery charging (not shunt) * 3-position battery select: gel, sealed or flooded * Very accurate control and measurement * Jumper to eliminate telecom noise * Parallel for up to 300 amps * Temperature compensation * Tropicalization: conformal coating, stainless steel fasteners & anodized aluminum heat sink * No switching or measurement in the grounded leg * 100% solid state * Very low voltage drops * Current compensated low voltage disconnect (LVD) * LEDs indicate battery status and faults * Capable of 25% overloads * Remote battery voltage sense terminalsElectronic Protections: * Short-circuit solar and load * Overload solar and load * Reverse polarity * Reverse current at night * High voltage disconnect * High temperature disconnect * Lightning and transient surge protection * Loads protected from voltage spikes * Automatic recovery with all protections