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20 Amp Solar Control - For Dual Battery Systems (Boat & RV)

Dual Battery Charging - charges two separate batteries using only one solar module. Perfect for boats, RVs and other systems with two batteries. Charges both batteries together, optional battery 1 priority charging first (S10D only)

3 Stage Charging - 1. Bulk charging (three flashes), 2. Absorption charge where voltage is limited (two flashes), 3. Float charge when the battery has been at the charge set point for a long time the voltage is reduced to a lower setting (one flash).


Models: S20D, (-24V)

Features
• Protection (PV & Batt), against short-circuit* & reverse polarity*, overload, over temperature & battery removal (*except 24V model)
• Extreme design –40° to +50°C (-40° to +120°F)
• Temperature Compensation
• Reliable - 100% solid state
• No need to derate
• Stainless steel case
• 5 year warranty
• Manufactured with solar power
• Designed and built in North America


Electrical Specifications
Voltage configurations 12 or 24 volts (custom voltages 6 to 36 volts)
Consumption 0.2 mA at night, 0.6 mA, 3.3 mA when charging
Max. input 40 volts (12V control), 60V (24V control)
Max. Charging current 20 amps DC
Status Light: 1 LED (3 flashes charging, 2 flashes at Bulk Voltage, 1 flash in Float Mode)
Regulation method Pulse Width Modulation PWM, positive side switching
Typical set points: Bulk:14.4 Volts, Float:13.6 Volts, Temperature Compensated (custom voltages available)

General Specifications
Temperature range: –40° to +50°C or +120°F
Case: Stainless steel case
Weight: 440 grams (15.6 oz)
Size (H x W x D): 8 x 14 x 4.5 cm (3.125 x 5.5 by 1.75 inches)
Mounting: wall mountable
Terminals: 12-24 AWG


Options
PWM Off (to ensure no radio interference)
Temperature Compensation Off
Custom voltage setpoints
Custom wire lead lengths
Lithium Battery (no charging below 4C)


Install Manual (pdf)

S20D

S20D
VOLTAGE