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A charge controller is required to prevent over-charging battery and short circuit the solar panel diode under load.
A charge controller also provide battery status which is vital to the user.
Solar panel installation is calculated based on winter requirements. Summer sun can produce up to 3 times as much power compared to winter which WILL overcharge the battery!
Battery State-of-Charge indicator
Large terminals (up to 16mm)
PWM-regulation (shunt type)
Boost & float charging method
Integrated temperature compensation
Solid-state overvoltage protection
Reverse polarity protection
Self power consumption < 4Ma
Battery State-of-Charge display with 3 LEDs
Acoustic load disconnect pre-warning and indication
Load short circuit and overload indication
PWM-regulation (series type)
Boost, Equalize and Float charging, also for VRLA
Automatic 12/24 Volt detection
Integrated temperature compensation
Large terminals (up to 16mm2 wire size)
SOC and voltage controlled LVD
Fully electronically protected
Self power consumption < 4Ma
Maximum Power Point Tracker
Maximum Power Point Tracking Technology increases the efficiency of your PV system
Allows for the use of less expensive grid-connected modules for 12 / 24V stand-alone systems
Automatic 12 / 24 Volt detection
Temperature-Compensated Three-Stage I-U Curve Charging Regulation
Up to 16 units can be operated in parallel
Fully electronic protection (Reverse Polarity, Over Current, Short-circuit, Over Temp.)
Negative grounding
Up to 95V solar panels connected in series, or 4 of our 175W panels to generate 600W of power to operate a small office using computer, printer/copier, light and radio.
With innovative maximum-power-tracking technology, MPP tracker ensures maximum performance from your solar array at all times and in all weather conditions. The MPPT can yield an energy gain of up to 30% from your PV array (with the average gain being 10%-25%)
MPPT includes a sweep-function which runs through the whole solar-panel voltage range once every 2 hours to find the point of the absolute maximum power output.
The temperature-compensated three-stage I-U curve charge regulation algorithm significantly extends the lifespan of your battery.
The possibility to use less expensive grid-tied large solar panels with up to 95V open circuit voltage for 12V or 24V stand-alone systems will significantly reduce the cost of the total system.
Nominal Voltage (V) 12V/24V
Max. Solar Input Voltage Voc (V) 95V
Max. PV Input Power 300W@12V, 600W@24V
Max. Battery Charge Current 20A
Power Conversion Efficiency (%) up to 97 %
Temperature compensation -4 mV/cell*K
Max. wire size (mm2) 32mm2
Dimensions (W x H x D) 185 x 150 x 115mm
Weight (Kg) 1.6kg
Temperature range (°C) -40 to +50 °C
Type of protection IP22
The most important function of the solar panel is to charge the battery.
Therefore, battery monitoring is the primary function of our controllers. Our "smart" controllers are designed to protect and monitor your battery.
$25
#35004 4 Amp Solar Controller
For 12V panel and 12V battery only.
$50
#35010 10 Amp Solar Controller
For 12/24V panels and 12/24V batteries. Panels can be connected in parallel up to 150 watts.
$300
#35020 MPPT 20 Amp controller
To charge battery using solar panel that is not 12V or 24V, a MPPT controller is needed. Connect solar in series and a MPPT solar charge controller will automatically convert to 12/24V.
Copyright CD Technology 2011. All rights reserved. Custom Design Technology, Inc. Santa Clara, California.