Solar Charge Controllers

A solar charge controller is used to regulate the energy flow from the solar panels to the battery by adjusting the parameters of Intensity (I) and Voltage (V). There are typically two types of charge controllers: MPPT charge controller and PWM charge controller.

Accepts Power

The controller takes in power from solar panels.

Controls Power

The controller regulates the amount of power that goes to the battery.

Monitors Voltage

The controller monitors the battery's voltage to prevent overcharging.

Controls flow

The controller only allows power to flow from the solar panels to the batteries.

MPPT Charge Controllers

The MPPT or ‘Maximum Power Point Tracking‘ controls are much more sophisticated than the PWM controllers and allow the solar panel to run at its maximum power point or, more precisely, at the optimum voltage for maximum power output. Using this smart technology, MPPT Solar Charge Controllers can be up to 30% more effective based on the attached solar panel’s voltage and voltage.

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Advantages of MPPT Charge Controllers

MPPT charge controllers convert all the solar electricity voltage possible into useable electricity. They operate at maximum power voltage (Pmp) which is higher than battery voltage. MPPT’s maximum conversion efficiency is ideal in intermittent sun and cloudy conditions, and in cold weather where they boost module output more than in warm weather.

PWM Solar Controllers

PWM controllers operate at battery voltage; are less expensive; and work well in locations where there is consistent, abundant, consistent sunshine, and economics favor installing more panels instead of more costly “balance of system” components. PWM controllers are simpler, smaller, and less expensive than MPPT controllers, and ideal for use in systems where extracting every last watt of electricity possible from a PV array is not a concern.

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Advantages of PWM Charge Controllers

There are indeed instances where a PWM controller can be a better choice than MPPT and there are factors which will reduce or negate the advantages the MPPT may provide. The most obvious consideration is cost. MPPT controllers tend to cost more than their PWM counterparts.

HHJ-60A & HHJ60-PRO

Upgrade Points


Temperature Probe Port
: Added a dedicated interface for external temperature probe support.

Parallel Communication Port: Supports parallel connection of up to 12 units for enhanced scalability.

Optimized Cooling Design: Improved heat dissipation with redesigned airflow channels for more precise thermal management.

POW-Keeper 1220/30/40

Upgrade Points


Added Total Power Consumption Monitoring
: Real-time tracking of overall system power usage.

Optimized Interface Layout: Improved page structure for a cleaner and more user-friendly experience.

Updated UI Switching Logic: Smoother and more intuitive interface transitions.

More Intuitive Battery Type Selection: Simplified selection process for different battery types.

POW-M60-PRO & POW-M60-MAX

Upgrade Points


Built-in Dedicated Wiring Terminals
: Plug and-play design simplifies installation and reduces setup time by up to 60%, while improving connection reliability. This makes on-site deployment faster and minimizes the chance of wiring errors during installation.

Larger Display Screen: Upgraded to a bigger screen for clearer system status and a more user-friendly monitoring experience. Key parameters and real-time data are now easier to read, helping users make quicker decisions.

POW-M60-PRO & POW-M60-ULTRA

Upgrade Points


Temperature Probe Port
: Supports external temperature sensing for improved battery management.

Parallel Communication Interface: Allows up to 12 units to be connected in parallel for greater power scalability.

Enhanced Cooling System: Added cooling fan for active heat dissipation and improved thermal control.

Customizable Charging Current Limit: Users can set a maximum charging current based on system needs.