Optimizing Energy from PV Arrays

Our MPPT (Maximum Power Point Tracking) and PWM (Pulse Width Modulation) solar charge controllers are designed with an optimal feature-to-cost ratio to minimize total cost of ownership of the off-grid system. For homes, cabins and RVs, our controllers are easy to use, reliable and include mobile device charging. Our controllers for industrial applications are designed to withstand the harshest conditions while offering industry-leading features like data monitoring to maximize reliability and prevent outage. For solar lighting systems, our controllers include an array of advanced control options including automatic seasonal adjustments as well as time, voltage and motion controlled dimming.

Our models offer these advantages:
  • CML: Designed for rural electrification and mobile device charging
  • ECO: Compact size and economical choice for low-power industrial applications
  • CXN: Advanced features and intelligence for industry and lighting applications
  • CIS: Built for the harshest environments with advanced lighting control features
  • Multi-purpose: Engineered for reliability in low- to high-power applications
CXNUP SERIES (10-40 A) - Datalogging and LCD
CXNup Series (10-40 A)
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CML-USB SERIES (5-20 A) - USB Charging Output
CML-USB Series (10-20 A)
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ECO-N (10 A) - Solar Charge Controller
ECO-N (10 A)
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CIS-N (10-20 A) - Solar Charge Controller - Lighting Control
CIS-N (10-20 A)
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CIS-N-LED (20 A)
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CM SERIES (4-10 A) - Charge Controller for Low Power Applications
CM Series (4-10 A)
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ECO-N-T SERIES (10-20 A) - Solar Charge Controller
ECO-N-T Series (10-20 A)
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What is a Solar Charge Controller?

A: A solar charge controller is vital to safely and efficiently charge batteries in a photovoltaic system. A charge controller is an electrical device that helps prevent the battery bank from overcharging and...

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How is a PWM solar charge controller integrated into an Off-Grid solar system solution?

A: The PWM solar charge controller draws its power from the battery bank. Using it’s pulse width modulation, or PWM circuit, it regulates solar power…

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Frequently Asked Questions

  • What does PWM stand for?

    PWM stands for Pulse Width Modulation and refers to a type of digital signals used to control electrical circuits. The signal has two states: ON and OFF. The amount of time used during each state can be varied. PWM is used in many applications such as motor drive circuits.

  • What is a Class 1 Div 2 certified solar charge controller?

    This refers to a solar charge controller that is safe to operate in certain hazardous locations. Hazardous locations are classified Class 1 if flammable gasses and vapors may be present in the area. Divisions define the likelihood of the hazardous material being present in a flammable concentration. Phocos provides several Class1 Division 2 solar charge controller options.

  • What is the main objective of a solar charge controller?

    The main goal of a solar charge controller is to extend and maximize the lifetime of batteries by controlling their charging and discharging mechanism.

  • What are the main tasks of solar charge controllers?

    A solar charge controller is a key component in a solar system solution to maximize the investment of all equipment. A high-quality solar charge controller optimizes performance, reducing periods of power disruptions and potential problems.

    • Battery charging
    • Battery Deep-discharge protection
    • Battery Over-charging protection
    • Battery State of charge monitoring
  • What type of solar charge controllers exist?
    • PWM or Pulse Width Modulation (Series and Shunt)
    • MPPT or Maximum Point Power Tracking
  • What is CV and CC for battery charging?

    CC stands for Constant Current and CV stands for Constant Voltage. The charging profile of a battery consists first of a CC phase, where a constant current is applied to the battery to increase its voltage up to a certain level. In solar systems, this current is the maximum current that can be delivered from the PV panel (this depends on the charge controller technology used) and may not be literally constant because of external conditions that affect the panel current such as irradiance. The CC phase is then followed by a CV phase when a certain target voltage is reached. During this phase, the voltage is kept constant.

Get In Touch Not sure what you need? Talk to the experts!


Phocos Americas, Inc.
Tucson, AZ USA
Phone +1 520 777-7906

Phocos AG
Ulm Germany
Phone +49 731 9380688-0

Phocos India Solar Pvt Ltd.
Puducherry - India
Phone +91 413 2972328

Phocos China Ltd.
Qingdao China
Phone +86 532 83837020
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