Steca PR 3030 PWM Solar Charge Controller, 30A, 12V/24V, with LCD Display

The Steca PR 3030 (MPN: PR 3030) is a PWM solar charge controller for 12 V and 24 V photovoltaic systems with a maximum charge and load current of 30 A. It is suitable for charging lead-acid, AGM, and gel batteries and combines reliable battery charging with integrated load control and a convenient LCD display for monitoring and configuring the system.

Product Highlights

• PWM charge controller for 12 V and 24 V battery systems with automatic voltage detection
• Maximum charging and load current of 30 A
• Suitable for lead-acid, AGM, and gel batteries
• Large LCD display showing state of charge, battery voltage, charge and load current, and energy meters
• Integrated load control with deep-discharge protection and evening and morning light functions
• Comprehensive electronic protection functions against reverse polarity, short circuits, overheating, and over- and undervoltage
• Temperature compensation for optimized battery charging (internal sensor, optional external sensor)

Clear system monitoring

Unlike the Steca PRS series, the PR 3030 features a graphical LCD display that shows all key operating data directly on the unit. In addition to the battery’s state of charge, the display can show battery voltage, module current, charging current, load current, and the amp-hours charged and discharged, among other things. This allows you to monitor the status of the entire off-grid system at any time without using additional measuring devices.

PWM Charging Technology for Lead-Acid Batteries

The charge controller uses PWM (Pulse Width Modulation) charging control. The charging process is controlled based on the battery’s state to ensure the gentlest and most reliable charging possible. It supports open-type lead-acid batteries as well as sealed AGM and gel batteries. The appropriate battery type can be selected directly on the controller, which automatically applies the corresponding charging characteristics.

Intelligent Load Control and Battery Protection

In addition to battery charging, the controller also supplies power to connected 12 V or 24 V loads via the integrated load output. The intelligent load control protects the battery from harmful deep discharge by automatically shutting off loads when the battery charge level is critical and reconnecting them once the battery is sufficiently charged. In addition, various operating modes are available for load control. These include continuous load supply, an evening light function, and a morning light function, which allow, for example, lighting to be automatically switched on and off according to the time of day.

Comprehensive protection features

• Reverse polarity protection for the battery, solar module, and loads
• Short-circuit protection at the module and load outputs
• Protection against excessive charging and load current
• Reverse current protection to the solar module
• Overvoltage and undervoltage protection
• Overtemperature protection with automatic load shutdown
• Deep discharge and overcharge protection for the battery

Typical Applications

• Garden and weekend homes
• Camping and Caravan Sites
• RV
• Boats
• Small commercial and recreational facilities
• Off-grid power supplies with lead-acid batteries

Technical Specifications

• Battery voltage: 12 V / 24 V (automatic detection)
• Max. charging or module current: 30 A
• Max. load current: 30 A
• Maximum module open-circuit voltage: < 47 V
• PWM frequency: 30 Hz
• Self-consumption: 12.5 mA
• Float charge: 13.9 V / 27.8 V
• Boost charge: 14.4 V / 28.8 V
• Equalization charge (liquid electrolyte): 14.7 V / 29.4 V
• Temperature compensation: -4 mV/K per cell (internal sensor, optional external sensor)
• Protection rating: IP32
• Mounting: Wall-mounted
• Terminals: up to 16 mm² (stranded) or 25 mm² (solid)
• Permissible ambient temperature: -10 °C to +50 °C
• Storage temperature: -20 °C to +80 °C
• Weight: approx. 350 g
• Dimensions (L × W × H): 187 × 96 × 44 mm

Package contents

1x Steca PR 3030 PWM solar charge controller, 30 A
1x User Manual