3KW PWM MPPT Solar Heater Charge Controller for Photovoltaic Panels

Model: ACTii AC7392

EAN: 6931240073926 SKU: 739260731

• PWM regulator for heaters with MPPT maximum power point tracking algorithm from photovoltaic panels. The regulator enables powering standard electric DHW boilers from solar panels
• The regulator is equipped with a temperature sensor, which allows stopping boiler heating above the set temperature. It is possible to change the set temperature.
• Two displays - one shows the current DHW temperature, the other by default shows the current power or, after switching, the panel voltage and peak power.
• Built-in charge buffer. Allows for higher efficiency (up to 30%) and reduction of interference caused by PWM regulation. Transistors with a large margin (ensure long, trouble-free operation)
• The regulator is powered from PV panels. There is no need to connect an external power supply. (The RJ45 socket can also be used to power the controller when there is no voltage from the panels)
• Large heatsink ensuring passive cooling, so there is no need to use a controller fan
• The regulator has thermal protection and active cooling depending on the temperature of the actuator and power.
• RS485 communication port allowing the reading of operating parameters from a computer.
• Heatsink and housing interior temperature control. Built-in acoustic alarm
• The regulator can be turned off and on (plus and minus button)
• Relay output informing about heater heating interruption. It can be used to connect external devices
• Made in EU

Description

PWM regulator for heaters with MPPT maximum power point tracking algorithm from photovoltaic panels.

The regulator enables powering standard electric DHW boilers from solar panels

A photovoltaic panel operates at maximum power only at the optimal voltage. Connecting a heater directly to a photovoltaic panel causes it to be overloaded too much and, as a result, a voltage drop. At a reduced operating voltage, the panel produces even several times less current than at the optimal voltage. The use of a charge controller eliminates this problem. Even on cloudy days, it will be possible to heat water in the boiler.

Built-in charge buffer, which allows for higher efficiency (up to 30%) and reduction of interference caused by PWM regulation.

The regulator is equipped with a temperature sensor, which allows stopping boiler heating above the set temperature.

The device is equipped with an additional relay output (potential-free) allowing notification of external devices that water heating has been completed (set temperature reached) or that a device failure has occurred. This output allows connecting additional devices.

Specification

Parameters

Supply voltage: controller power supply from PV panels

Panel voltage: From 10V to 350V DC

Panel current: MAX 13A

Maximum heater power: 3kW

Maximum panel power: 3kW

Power consumption: 0.08 A

Temperature measurement accuracy 0.1 degree

Method of operation

Configuration consists of setting the target temperature that domestic hot water is to reach. This is done by pressing the MENU button until an intermittent sound appears from the controller. Then "S.tE" appears on the upper display, which means setting the target temperature. It is possible to reduce the operating voltage by the regulator, but this option is recommended when using an external power source. The start voltage can be reduced by holding down the minus button until an intermittent signal appears from the buzzer. The default starting voltage is 150V.

Turning the regulator on and off:

The regulator can be turned off by briefly pressing the MINUS button (voltage stops being supplied to the heater)

Turning on is done by briefly pressing the PLUS button. By default, after turning on the power, the regulator automatically starts working (supplying power to the heater using the MPPT maximum power point tracking algorithm.) if the voltage exceeds the minimum value. The regulator can only work with photovoltaic installations; it cannot be used for wind turbines. Apart from the settings described above, the regulator does not require any additional maintenance. Adjustment of operating parameters happens automatically and depends on the panel capabilities and load. The regulator must be loaded ONLY with heaters used in boilers. Do not use air resistance heaters or other electronic devices.

Additional information

Temperature sensor cable length: approximately 100cm

What kind of heater should I use AC or DC and what power?

Since the only parameter describing the heater is resistance, you can use an AC or DC heater.

The heater should be matched to the photovoltaic panels.

If your photovoltaic panels nominally provide 140V DC 7.14A 1000W, the most suitable will be the use of a 140V DC heater with a power of 1000W,

but you can also use a 230V AC or 110V AC heater. You only need to match the heater power to the PV panels. (we provide an online calculator to calculate the proper heater).

According to the above, (since the only parameter of the heater is its resistance, as well as current intensity) it is possible to match a 230V heater to work with PV panels of a different voltage, using Ohm's law. 140V / 7.14A = 19.61 Ohm. Our heater is to have 19.61 Ohm. For a 230V heater P=U*U/R.P=230*230/19.61=2697W. For 140V 7.14A PV panels, we can therefore use a 230V AC heater with a power of about 2700W.

Heaters can have two independent coils. One coil can be used to heat water from PV panels and the other from the 230V network.

During normal operation, the following parameters are displayed on the screen: current power and DHW temperature. Flashing of the OUT LED indicates that power is being supplied to the heater.

The device is equipped with an additional relay output (potential-free), allowing notification of external devices that

water heating has been completed (set temperature reached) or entering emergency mode (actuator failure).

Set contents

Regulator with charge buffer

Packaging

Manual

Temperature sensor

Cable connectors

Certificates and standards

CE, RoHS

Dimensions, Weight

Product dimensions: 130 x 140 x 120 mm (D x W x H)

Package dimensions: 140 x 150 x 140 mm (D x W x H)

Product weight: 930 g

Weight with packaging: 950 g

Zum Download

• User Manual
• CE Declaration
• SAFETY COMPLIANCE