Compact dual-battery solar charge controller for caravans, motorhomes, boats and yachts — manages two 12 V batteries (engine and leisure) with automatic priority and fault protection.

• Extremely high reliability: 5 year warranty and an estimated 15 year life
• Rated charging current 25 A; fully automated operation for 12 V systems; maximum solar input 400 W (or 25 A)
• Minimum battery voltage 1 V; 3 pairs of terminals (battery 1, battery 2, solar); terminals accept wire up to 16 mm²
• Self-consumption 5.5 mA at night, 10 mA when charging; negative common ground
• Working temperature -40 °C to +45 °C (-40 °F to 113 °F); size 168.8 x 55.1 x 34.5 mm (6.65 x 2.17 x 1.36 in); weight 260 g (0.57 lb)
• Protection features: reverse polarity, overcharge, short circuit and reverse current blocking; epoxy encapsulation and multiple mounting holes
• Four-stage series PWM pulse charging; battery type selection (sealed or flooded) and slow-switching mode for sensitive loads
• LED status indicator and RJ-11 socket for remote LCD meter; will deliver 100% charge to a single battery if only one is connected

Suitable for systems up to 400 W solar input. Product documentation: Data sheet for SSD-25 Morningstar SunSaver dual battery solar controller and instruction manual available.