This standard specifies the minimum performance, safety, and reliability requirements for DC charge controllers used in standalone photovoltaic (PV) systems. It covers both PWM and MPPT type controllers and outlines the test procedures required to verify their functionality and endurance.
Defines the minimum performance requirements and test methods for charge controllers used in standalone photovoltaic (PV) systems.
Quick Reference Values
Minimum controller efficiency>90% (typical, varies with type)
Maximum self-consumption<1% of rated current
Voltage regulation accuracy±1%
Operating temperature range-10°C to +50°C
Typical Low Voltage Disconnect (12V system)11.1 V
Typical High Voltage Disconnect (12V system)14.4 V
Key Formulas
Efficiency (%) = (Output Power to Battery and Load / Input Power from PV) * 100
Practical Notes
Ensure the charge controller's nominal voltage (e.g., 12V, 24V, 48V) and current rating are correctly matched with the PV array and battery bank.
The standard is crucial for product selection and quality assurance, forming the basis for tenders and procurement of off-grid solar components in India.
Pay close attention to the controller's self-consumption rating, as high self-consumption can significantly reduce the overall efficiency of a small PV system.