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PWM Solar Charger Controller

Your professional PWM solar charger controller supplier

The originator of longchi technology has rooted in the field of solar energy as early as in 1990s. Longchi factory was founded in 2011, occupies 56667 square meter and is located at the center of the yangtze river delta-huzhou,zhejiang.

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Types of PWM Solar Charger Controller

Mppt Solar Charge Controller Kings

Powertech Mppt Solar Charge Controller

80a Mppt Solar Charge Controller

Mppt Charge Controller For Two Battery Banks

Mppt Solar Charge Controller Kings
The MPPT Solar Charge Controller Kings is a state-of-the-art solution that redefines solar charging efficiency and reliability.

Mppt Charge Controller For Two Battery Banks
The MPPT Charge Controller for Two Battery Banks is a revolutionary device engineered to meet the diverse needs of modern solar energy systems.

Powertech Mppt Solar Charge Controller
This controller utilizes the most advanced Maximum Power Point Tracking (MPPT) technology to ensure that your solar panels operate at peak efficiency, extracting the maximum power possible regardless of changing environmental conditions.

36v Mppt Charge Controller
Rated charging current: 40A max. PV input power: 520W/12V for battery system, 1040W/24V for battery system Battery voltage range: 8V~32V Max. PV open circuit voltage: 100VDC

80a Mppt Solar Charge Controller
MPPT solar charge controller is an advanced solar charger with maximum power point tracking.Applying intelligent MPPT algorithm allows solar charge controller to extract maximum power from solar arrays by finding the maximum power point of the array.

Sps Mppt Solar Charge Controller
SPS MPPT is one of the best solar charge controller available with long service life. SPS MPPT Solar Charge Controller 40A comes with smart sensing feature and will automatically detect the battery voltage when connecting to a battery bank (12V/24V/48V) or can override this feature by setting prob button.

Advantages of PWM Solar Charge Controller

Cost-effective:Making them a popular choice for smaller solar systems with fewer panels and those within a tight budget. Additionally, PWM controllers are relatively simple in design and operation, which contributes to being user-friendly.

Durable:PWM controllers are also known for their reliability and durability. With fewer components and a simpler circuit design, there are fewer potential points of failure, making PWM controllers less prone to malfunctions. They are often considered a robust and dependable option for solar charging.

Reliable in hot climates:WM controllers are efficient in warm, sunny environments where the solar panel voltage is naturally lower due to heat. This brings the panel voltage closer to the battery voltage, minimizing efficiency loss.

The Difference Between PWM and MPPT Solar Charge Controllers

	PWM Charge Controller	MPPT Charge Controller
Array Voltage	PV array & battery voltages should match	PV array voltage can be higher than battery voltage
Battery Voltage	Operates at battery voltage so it performs well in warm temperatures and when the battery is almost full	Operates above battery voltage so it is can provide “boost” in cold temperatures and when the battery is low.
System Size	Typically recommended for use in smaller systems where MPPT benefits are minimal	≈ 150W – 200W or higher to take advantage of MPPT benefits
Off-Grid or Grid-Tie	Must use off-grid PV modules typically with Vmp ≈ 17 to 18 Volts for every 12V nominal battery voltage	Enables the use of lower cost/grid-tie PV Modules helping bring down the overall PV system cost
Array Sizing Method	PV array sized in Amps (based on current produced when PV array is operating at battery voltage)	PV array sized in Watts (based on the Controller Max. Charging Current x Battery Voltage)

Sizing a PWM Charge Controller

When sizing a PWM power controller, here are some basic principles to follow:
If the nominal voltage of a PWM charge controller is not equal to the nominal voltage of the solar array and the battery bank, you are going to lose a part of the solar generated power.

The solar charge regulator must sustain the maximum current of the solar array at the maximum ambient temperature.

The maximum voltage of the solar array must be lower than the maximum input DC voltage of the controller. Otherwise, the controller might get damaged at the lowest ambient temperature.

The DC voltage of the solar array must always be higher than the controller’s minimum DC voltage; this rule will ensure that the PWM controller will always work and track the solar array at the highest ambient temperature.

Mind that if the solar array only consists of solar panels wired in parallel, the solar array voltage is equal to the voltage of a standalone solar panel, while the solar array current will be a sum of the currents of the standalone panel.

Upon sizing the charge controller, here are the essential parameters of a single solar panel that are to be considered:
- Voc - the maximum open-circuit solar panel voltage at the lowest ambient temperature and the minimum open-circuit voltage at the highest ambient temperature.
- Isc - the solar panel short-circuit current at the highest ambient temperature.

Certificate

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FAQ

Q: Can a PWM controller be used with a solar inverter?

A: Yes, a PWM controller can be used with a solar inverter, but its application depends on the system design. A PWM charge controller is typically used in solar power systems to regulate the charging of batteries from solar panels.

Q: How efficient is a PWM solar charger?

A: An average PWM charge controller will only have 75 - 80% efficiency because of the simplified way the charging function was designed, meaning it does not convert all the solar panel's larger voltage potential into current.

Q: What is the difference between PWM and MPPT solar controllers?

A: MPPT controllers have higher efficiency, leading to increased energy output and faster charging times. PWM controllers are less efficient but still provide reliable charging capabilities.

Q: What size charge controller for 400W solar panel?

A: 400W Solar Panel: For a 12V battery bank: 400W / 12V = 33.3A. 33.3A x 1.25 = 41.63A. A 40A charge controller would be recommended.

Q: How does a PWM solar charge controller work?

A: Traditional solar regulators featuring PWM (Pulse Width Modulation) charging operate by making a connection directly from the solar array to the battery bank. During bulk charging when there is a continuous connection from the array to the battery bank, the array output voltage is 'pulled down' to the battery voltage.

Q: What is the principle of PWM controller?

A: Pulse width modulation or PWM is a commonly used control technique that generates analog signals from digital devices such as microcontrollers. In PWM technique, the signal's energy is distributed through a series of pulses rather than a continuously varying (analog) signal.

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