• 100% solid state
• Fully encapsulated in epoxy
rated terminals/anodized case
• Series design (not shunt)
• True 0 to 100% PWM duty cycle
• Setpoint accuracy to 35 mV
• Rated for 25% overloads
• Temperature compensation
need to derate
for 40 amps or more
• Green charging/Red LVD indicators
• Weight is 8 oz (0.23 kg)
Max Solar Current 20 Amps
Max Load Current
20 Amps 20 Amps
14.1 Volts 28.2 Volts
Flooded 14.4 Volts
11.5 Volts 23.0 Volts
Reconnect 12.6 Volts
Max PV Volts 25 Volts
6 to 10 mA
-40 to +85 C.
- 100% Solid State: All power switching
is done with FETs. No mechanical relays are used in the controller.
- Battery Charge
Regulation: Uses an advanced series PWM charge control for constant voltage battery charging. A true 0 to 100% PWM duty cycle
is very fast and stable for positive charge control under all system conditions.
Compensation: A sensor next to the green LED measures ambient temperature conditions. Corrects the constant voltage setpoint
–28 (–56 for 24V) mV per °C with a 25°C reference. This correction matches the battery charging to the
changing electrochemical properties of the battery, and works best if the battery and controller are in a similar thermal
- Sealed / Flooded Select: Flooded batteries require more vigorous charging
to avoid stratification, and sealed batteries require precise control to avoid outgassing. Constant voltage setpoints are
14.4 (or 28.8) volts for flooded batteries, and 14.1 (or 28.2) volts for sealed batteries.
Voltage Disconnect (LVD): The automatic load disconnect is an option. If the battery falls below 11.5 (or 23.0) volts, the
load is disconnected from the battery to protect against harmful deep discharges. A 2-second delay prevents load disconnects
from transients. The load is automatically reconnected when the battery voltage recovers to 12.6 (or 25.2) volts.
- Battery Disconnect: If the battery is disconnected during the daytime, the PV array will continue
to provide power to the controller. Will immediately go into PWM and provide power at a constant voltage to the load. This
may continue as long as power is available from the PV array.
- Parallel Controllers:
Work very well in parallel configurations. No blocking diodes are required. The only constraint is that each controller must
have an independent and separate PV subarray and load. Make sure that each controllers rating for PV and load current is not
- Auxiliary Generators: Engine generators and other sources of power may be
connected directly to the battery for charging. It is not necessary to disconnect the controller from the battery. However,
do not use the controller to regulate these other generators.
- Reverse Current: Prevents
the battery from discharging through the PV array at night. There is no need to install a blocking diode for this purpose.
- Noise: The controllers circuit minimizes switching noise and filters all noise output to extremely
low levels when the system is properly grounded. If noise is present in a telecom load, it is most likely a grounding problem
in the system.