Maximum Power Point Tracking (MPPT) solar charge controllers are significantly more efficient than the cheaper Pulse Wave Modulation (PWM) solar charge controllers. Please be very careful when buying this type of MPPT charge controller as there are charge controllers on the market which have model numbers such as MPPT T40 which are only PWM charge controllers. See YouTube review videos below. A true MPPT solar charge controller needs a large transformer coil and capacitors inside, it is a bigger heavier unit and will usually takes at least 100V-150V input.
An MPPT solar charge controller in cool conditions can produce 25-30% more battery charging power than a simple PWM controller and you can connect high voltage panels to lower voltage battery banks. By using higher voltage on the panel side will also benifit by less volt drop and can use thinner cables. On large arrays we run everything at 100V - 150V.
EPSolar charge controllers have established themselves for almost 10 years. We are offering their latest EPEver range of excellent value Tracer A series and iTracer MPPT solar charge controllers. Epsolar/ EpEver has passed ISO9001. All products have CGC-solar, CE, ROHS, FCC and ETL certificates and are sold in over 120 countries worldwide
Cheaper PWM charge controllers are a good low cost solution for small systems only. To fully exploit the potential of MPPT charge controllers, the solar panel array voltage should be substantially higher than the battery voltage and is generally recommended for systems of 100-150W and upwards. The MPPT controller enables higher PV system voltages which can then reduce cabelling costs by allowing for smaller cable cross sectional areas. The MPPT controller will also harvest substantially more power when the solar cell temperature is low (below 45°C), or very high (above 75°C).
To calculate which size controller you need, take the peak solar panel watts and divide by the / battery voltage to give the MPPT rated charge current in Amps, for example 150W/12V = 12.5A, therefore a 20A rated charge controller is recommended.
iTracer – product features
Hi efficiency energy harvest with advanced MPPT algorithm
advanced maximum Power point tracking (MPTP) technology, with efficiency no less than 99.5%
high quality components with maximum conversion efficiency of 98% and full load efficiency of 97%
Powerful dual core CPU control architecture for ultra quick system responce speeds
multiphase peak conversion efficiency 98%
12/24/36/48V auto charging or user defined
Ultra fast tracking speed and guaranteed tracking efficiency
reliable automatic limit function of maximum PV input power, ensuring no overload risk.
Wide maximum PowerPoint operating voltage range
Die-Cast aluminium casing for heat disserpation
supports 4 charging options, sealed, gel, flooded and user defined
battery temperature compensation function
Real time energy statistics function
includes RS-485 and RS-232 communication bus interface and mod bus communication protocol
RS-485 plug socket port can be used for PC monitoring via USB connection and internet connectivity, this socket can also be used for connecting the MT50 external display unit to show real-time data checking and parameter settings.
Includes remote temperature sensor cable to remotely detect battery temperature allowing MPPT technology to adjust parameters.
The controller has three stages battery charging algorithm (bulk charging, constant charging and flow charging) for rapid, efficient and safe battery charging.
high reliability including reverse connection, overcurrent and short circuit protection
run data and event recording
Technical - iTracer IT6415ND
Nominal System Voltage 12/24/36/48V Auto
Battery Input Voltage Range 8V ~ 68V
Max Charge/ Discharge Current 60A
Max. PV Open Circiuit Voltage 150V (At minimum operting environment temperature)
Max. PV Open Circiuit Voltage 138V (At 25 DegC operting environment temperature)
MPPT Voltage Range +2V ~ 108V
Max Rated Charging Power (60A), 800W (12V), 1600W (24V), 2400W (36V), 3200W (48V)
Max. PV Array Input Power 2400W (12V), 4800W (24V), 7200W (36V), 9600W (48V)
Wiring Connections, Solar +/-, Battery +/-, Power Output +/-, Temp Sensor, RJ485, RJ232
Working Environment Temperature Range - 25 to +45 DegC
Humidity Range <95%
Dimensions 440mm x 231mm x 110mm
Power Terminals 5AWH (16mm sq)
iTracer - Accessories Included
Remote Temperature Sensor Cable, 3M
USB to RS-485 PC Connection cable, 1.5M
Solar Station PC software CD used to monitor each controller using a network