ASC 30 Watt and ASC 50 Watt
ASC30W Manual (pdf)    ASC20W Manual (pdf)                                  
$38 USD

 ASC50W Manual (pdf)
$42 USD

5.5 Amp
S5.5 Manual (pdf)
$49 USD

6 Amp - for extreme environments
• Extreme temperature –40° to +85°C (-40° to +185°F)
S6 Manual (pdf)
$59 USD

Unique no battery drain
- Battery standby power consumption is zero! In the dark they use absolutely zero power, ideal for PV systems where efficiency is important. Other controls, which have a standby current draw, will drain the battery on cloudily days or over the winter with no solar input, reducing the freeze protection of the battery.

Tough, easy to install and practically indestructible. Perfect for telecommunications, solar powered parking meters and other small PV systems. The zero battery consumption saves lots of power, especially in systems with cloudy winters. This means a smaller solar panel can be used saving you money. Starts charging at 2.5 battery volts.

Efficient Design – automatic nighttime shutdown with an intelligent design results in the controller using < 1/10th the power of the industry average. Other controls stay on all night, wasting precious power. Save up to 10% of the power from a 5 Watt module.

Safer - SunSport controls have more built in protection and safety features than any others on the market. They feature automatic over-temperature shutdown, protection from battery removal conditions, over-current, solar and battery reverse polarity, short circuit and over-voltage protection of the inputs and outputs. Eco Energy is the first to combine all of these safety features into one controller. In remote applications, there is no need to worry about accidentally damaging the controllers.

Optional Dual Charging - can charge two separate batteries using only one solar module. Perfect for boats, RVs and other systems with two batteries.

Many innovations in a new design. Going solar with confidence has never been easier.

ASC charge controllers provide you with many benefits over the Morningstar Sunguard.


• Unique - Zero Battery consumption
• Protection (PV & Batt), against short-circuit & reverse polarity, overload, over temperature & battery removal
• Can charge a completely discharged battery
• Series design (not shunt)
• Reliable - 100% solid state
• No radio interference
• Temperature compensation (.028V/C or .016V/F)
• Fully encapsulated in epoxy potting
• 5 year warranty
• Manufactured with solar power
• Designed and built in North America

Electrical Specifications
Voltage configurations 12 volts (custom voltages 6 to 20 volts)
Consumption daylight only, 3 mA, 7 mA with LED, 0.5mA when in standby
Battery consumption zero, 0.0 mA
Status Lights: 1 LED (charging)
Max. PV open circuit voltage 30 volts
Max. Charging current at 50 °C (S6 at 85°C)
Min. Battery voltage to begin charging 2.5 Volts
Regulation method Low frequency On-Off series type, positive side switching
Typical set points: Off: 14.2 Volts On: 13.2 Volts, Temperature Compensated

General Specifications

ASC30 & 50W
Temperature range: –40° to +50°C or +120°F
Case: ABS case, completely sealed in epoxy
Weight: 50 grams (approx. 2oz)
Size(H x W x D): 5.1 x 5.1 x 3.8 cm (2 x 2 x 1.5 inches) not including mounting tabs
Wire: 18 gauge leads 5 inches long

Temperature range: –40° to +50°C or +120°F
Case: ABS case, completely sealed in epoxy
Weight: 55 grams (approx. 2oz)
Size(H x W x D): 3.8 x 7.0 x 3.1 cm (1.5 x 2.75 by 1.3 inches)
Wire: 18 gauge leads 5 inches long

Case: Solid aluminum case, completely sealed in epoxy
Weight: 140 grams or 5oz.
Temperature range: –40° to +85°C -40° to +185°F
Size(H x W x D): 6.7 x 9.6 x 1.8 cm (2.6 x 3.8 by .8 inches)
Wire: 14 gauge leads 5 inches long
Optional CSA Class I Div II Certification for Hazardous Locations

Custom voltage setpoints
Dual battery charging option
Custom wire lead lengths

Single Battery Wiring Diagram

Dual Battery Wiring Diagram
Dual Battery