Phocos CM 04 Charge Controller 4A, 12V

CM 04

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Product information

The Phocos CM 04 is a small and simple charge controller. It is a great choice for small PV systems where there is no need for battery low voltage disconnect (LVD). 

The CM 04 is a good charge controller to use with small solar panels up to 45W. Please note that Phocos CM models do not have a Low Voltage Disconnect (LVD), therefore the controller cannot regulate the discharge of the batteries and prevent them from over discharging. In the event that this is a desired feature, we recommend using a controller such as Phocos ECO-10, ECO-N-10-T or CMLup10, all of them with LVD and capable of handling up to 10A of charge/discharge current.

The controller features a LED indicator, large terminals for up to 16mm2 cable, efficient PMW charging, over voltage protection and reverse polarity protection.

Phocos CM 04 charge controller features:
-  Charging display with LED
- Large terminals (up to 16mm2)
- PWM-regulation
- Boost & float charging method
- Solid-state overvoltage protection
- Reverse polarity protection

Phocos CM 04 technical specifications:
Phocos model: CM 04
System voltage:  12 Volts
Max. charge current: 4 Amps
Float charge: 13.7 V
Boost charge: 14.5 V activation: battery voltage <12.2 V
Max. panel voltage: 30 V
Max. self consumption: 4 mA
Grounding: positive grounding possible
Ambient temperature: −40 to +50 °C
Max. altitude: 4,000 m above sea level
Battery type: lead acid (GEL, AGM, flooded)
Wire cross section: < 16 mm2
Weight: 68 g
Dimensions (W xH x D): 72.6 x 61 x 30.4 mm
Type of protection: IP22

Phocos was founded in Germany in the 1980’s. The original founders were engineers and researchers who studied renewable energy at the Ulm University of Applied Sciences. They mainly focused on off-grid applications, for use in remote areas with no connection to the electric grid. As the demand for renewable energy sources grew in remote areas, so did their range of innovations. Phocos maintains a priority to develop eco-friendly, simple to use, energy saving products that are also durable with high-end technology. Applications of their products range from rural, recreational, residential, to industrial. Phocos North America is located in Tucson, AZ. Phocos also has 12 other offices around the world. 

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Phocos CM04 and CM10

Technical specifications for Phocos CM04 and CM10 charge controllers

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Other Phocos PMW controllers

CM 04 and CM 10
The CM 04 and the CM 10 are the smallest and most inexpensive charge controller Phocos offers. They are ideal for small systems that do not require Low Voltage Disconnect (LVD).
Main feature: Does not include Low Voltage Disconnect (LVD)
PV capacity CM 04: up to 45W
PV capacity CM 10: up to 120W
Available voltage: 12V
Low Voltage Disconnect: No
Rating: Indoor

ECO 10
The ECO 10 is small and versatile, it is fully encapsulated and the connections are made via the provided wires. It does not have any moving parts and it is the best option for small systems (up to 120W) exposed to rough or corrosive environments.
Main feature: Fully encapsulated, no moving parts
PV capacity: up to 120W
Available voltage: 12V
Low Voltage Disconnect: Yes
Rating: Encapsulated for though environments

CMLup10 and CMLup20
The CMLup controllers are modern and lightweight. They are a convenient solution for small systems when the controller is in a dry and friendly environment. They feature a USB port for easy charging of portable electronics.
Main feature: Best option for indoor use, USB charging port
PV capacity CMLup10: up to 120W
PV capacity CMLup20: up to 240W
Available voltage: 12V, 24V with auto select
Low Voltage Disconnect: Yes
Rating: Indoor use

ECO-N-10-T and ECO-N-20-T
Indisputable a great controller for humid, dusty or corrosive environments. As the ECO 10 unit, the electronics in the ECO-N-T units are fully potted and cased in an aluminum cover, the main difference is that they come with terminals instead of wires to facilitate a secure connection.
Main feature: Excellent for humid, dusty or corrosive environments.
PV capacity ECO-N-10-T: up to 120W
PV capacity ECO-N-20-T: up to 240W
Available voltage: 12V, 24V with auto select
Low Voltage Disconnect: Yes
Rating: Encapsulated, corrosion resistant

Besides the front display, the first thing you will notice about the Dingo D2020N is the wide range of operating voltages 12V, 24V, 32V, 36V and 48V it provides out of the box. It is fully programmable and works with wind and micro-hydro power sources.
Main feature: Display and 5 fully programmable voltage set points
PV capacity: up to 240W (wind and hydro compatible)
Available voltage: 12V, 24V, 32V, 36V, 48V
Low Voltage Disconnect: Yes
Rating: Indoor use

The CMLsolid30 is the largest Phocos PMW controller, suitable for medium 12/24V PV arrays up to 360W. Provides 30A of charging capacity and LVD. It is compact and features a heat dissipator in the back. It has full electronic protection and is cased in a flashy orange aluminum cover. It also features a USB for charging small electronics.
Main feature: Compact size with 30A of charging capacity.
PV capacity: up to 360W
Available voltage: 12V, 24V with auto select
Low Voltage Disconnect: Yes
Rating: Protected electronics

CIS-N-10 and CIS-N-20
The CIS-N controllers are known for their built-in load timer. They are commonly used in solar lighting applications. They are fully encapsulated in an aluminum case and does not have any moving parts. It is suitable for 12V and 24V systems and it comes in 10A and 20A. Some CIS models can control two independent loads. Don’t judge it by it’s size, the CIS-N controller is loaded with features.
Main feature: Built-in timer for one or two independent loads.
PV capacity CIS-N-10: up to 120W
PV capacity CIS-N-20: up to 240W
Available voltage: 12V, 24V with auto select
Low Voltage Disconnect: Yes
Rating: Encapsulated, corrosion resistant

CIS-N-LED 350/600/700/1050/1400/2800mA
The CIS-N-LED controller includes all the great features found in the legendary CIS-N but it was designed specifically to operate with LED lights. The appearance and specs of the controllers are very similar, however, the CIS-N-LED features a LED driver and a light dimmer.
Main feature: Built-in driver for LED lights
PV capacity CIS-N-LED 350/600/700mA: up to 120W
PV capacity CIS-N-LED 1050/1400/2800mA: up to 240W
Available voltage: 12V, 24V with auto select
Low Voltage Disconnect: Yes
Rating: Encapsulated, corrosion resistant

Summary Table

ModelVoltageCurrentMax PV capacityLVDRating
CM 0412V4A45WNoIndoor
CM 1012V10A120WNoIndoor
ECO 1012V10A120WYesEncapsulated
Dingo D2020N12/24/32/36/48V20A240WYesIndoor
CIS-N-LED 350/600/700mA12/24V10A120WYesEncapsulated
CIS-N-LED 1050/1400/2800mA12/24V20A240WYesEncapsulated

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Phocos CM 04 Charge Controller 4A, 12V

Phocos CM 04 Charge Controller 4A, 12V

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