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PV hot water units

PV hot water units: solar power for hot water

PV hot water units divert surplus solar power into a hot water cylinder instead of feeding it into the grid. The collection is aimed at owners of a PV system with a hot water cylinder who want to increase their self-consumption and make sensible use of a heating element or boiler.

Output is important: heating elements and controllers are available with 2, 3 and 9 kW, and from My-PV also single-phase or three-phase. Check whether a screw-in or immersion heating element fits your cylinder and whether the control needs an electricity meter. For SolarEdge systems, the brand's hot water controllers can be used.

Our range includes My-PV with AC ELWA 2, AC THOR 9s, heating elements and accessories such as Modbus and USB interface, electricity meter and temperature sensor, as well as SolarEdge hot water controllers with 3 and 5 kW. Sensors, controllers and complete units can be ordered individually.

Electrical connection and installation in the cylinder belong in the hands of specialists. If you have questions about the combination, you can reach us on +49 931 760 260 40 or kontakt@energie24.shop.

Frequently asked questions

Is a PV hot water unit worthwhile?

That depends on your surplus and how the cylinder is used. Those who feed in a lot and heat water electrically can benefit. We cannot promise a binding level of profitability.

What is the difference between ELWA and THOR?

Both divert surplus power into a heating element. The ELWA is designed as a ready-made hot water unit, the AC THOR as a power controller for heating elements. The product pages describe the setup and connected load.

Do I need an electricity meter as well?

For surplus-based control, grid consumption is measured. Manufacturers offer meters and measuring clamps as accessories for this. Whether your device needs one is stated in the data sheet.

  • My - PV AC ELWA 2

    My-PV My-PV AC ELWA 2

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    Our AC ELWA 2 is a hot-water heating unit, continuously controlled from 0 to 3.5 kW, for grid-connected photovoltaic systems. The AC ELWA 2 uses surplus photovoltaic energy for your hot-water heating and thereby optimizes the self-consumption of the existing PV system. At the same time, self-sufficiency is increased – this protects against unpredictable or rising operating costs. Thanks to the continuous control, the PV feed-in power is regulated down to zero.The AC ELWA 2 has our proven optional hot-water assurance: even if the sun is not shining enough for a while, the hot water can be brought to the desired temperature using energy from the public power grid. The device can be installed in hot-water and buffer tanks.Advantages of the AC ELWA 2: More power: 3.5 kW instead of 3.0 kW Simplest mounting: the heating element and the control unit can be attached one after the other. Easy operation thanks to a display like the AC•THOR Multiple communication options: in addition to Ethernet RJ45, also Wi-Fi, RS485, PWM-in, potential-free switching output External temperature sensor included An external 3 kW heating element can be connected Even more compact design than its predecessor Fixed wiring, no cable with Schuko plug Easy conversion of the AC ELWA-E to AC ELWA 2

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    819,99 €

    inkl. MwSt.

  • My - PV AC THOR 9s

    My-PV My-PV AC THOR 9s

    Arriving soon  Voraussichtliche Lieferzeit

    The My-PV AC THOR 9s is a photovoltaic power manager, continuously controlled from 0 to 9 kW, for hot water, electric heat sources and, optionally, space heating. It automatically distributes surplus solar power depending on the PV energy available and the heat demand. It is therefore aimed at everyone who wants to convert their solar power directly into heat. Highlights Continuously variable up to 9 kW: The power manager controls the output smoothly and controls up to 3 electric heat sources. 3 controllable outputs: Easy loading of three zones with 3 kW each, also for 3-phase heating elements with a common neutral conductor. Plug & play: All connections are pluggable; there are no terminal points and no need to laboriously open the housing. Touch display: Operation is possible directly on the device without additional equipment. Flexibly combinable: Can also be combined with a heat pump; two-zone space heating is also possible. Open system: Suitable for various inverters, battery systems and smart homes. Technical specifications Description Value Grid voltage 3 x 230 V, 50 Hz Outputs 0-3000 W continuously controlled, three outputs, max. 9000 W Grid connection 3-phase with neutral conductor Load connections Plug contacts Display Colour graphic, touch screen 2.83" Dimensions (W x H x D) 135 x 195 x 65 mm Who is it for? According to the manufacturer, the AC THOR 9s is particularly suitable for single-family and multi-family homes, farms, commercial and industrial applications, hotels and tourism businesses, and local and district heating networks. With up to 85% PV self-consumption even without battery storage, it is an interesting addition for photovoltaic systems that want to make good use of their surplus. Good to know If needed, any missing residual energy can be drawn from the public power grid. Installation and connection to your building services should be carried out by a qualified electrician. We will gladly clarify with you in advance whether the device suits your system. We will gladly advise you personally: phone +49 931 760 260 40 or e-mail at kontakt@energie24.shop. Pickup at our Veitshöchheim warehouse is possible by arrangement.

    Arriving soon  Voraussichtliche Lieferzeit

    969,99 €

    inkl. MwSt.

  • My - PV AC THOR Energy Manager 3 kW

    My-PV My-PV AC THOR Energy Manager 3 kW

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    Hot-water heating and space heating with solar power AC•THOR is a 0 - 3 kW continuously controlled photovoltaic power manager for hot water, electric heat sources and, optionally, space heating. Simple & efficient: the AC•THOR controls electric heat sources depending on the availability of PV energy and heat demand, for both hot water and space heating. It looks after your personal comfort fully automatically. In a residential building constructed or renovated to today's thermal standards, the AC•THOR replaces conventional water-based building services. Any missing residual energy can be drawn from the public power grid. Of course, the AC•THOR can also be integrated into conventional water-based systems such as buffer tanks. Its flexibility leaves nothing to be desired. Thanks to the built-in touch display, it can be operated at any time without additional devices. And it is child's play to install. Advantages 30% cost saving compared with conventional systems thanks to self-generated energy Maintenance-free thanks to cables instead of pipes Smaller utility room required Open system for various inverters, battery systems and smart homes Enables affordable living in housing construction as well Up to 85% PV self-consumption even without battery storage Technical specifications Grid voltage: 230 V, 50 Hz Outputs: 0-3000 W continuously controlled + switching output 16 A Grid connection: single-phase, earthing-contact plug Load connection: earthing-contact socket for resistive loads Display: Colour graphic, touch screen 2.83" Connection cable: 2.8 m Dimensions (W x H x D): 135 x 210 x 65 mm

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    809,99 €

    inkl. MwSt.

  • My - PV Digital Meter P1 Interface for AC - THOR/AC - THOR9s

    My-PV My-PV Digital Meter P1 Interface for AC-THOR/AC-THOR9s

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    The P1 digital meter interface is intended exclusively to connect the AC•THOR and AC•THOR 9s PV power managers to the P1 digital meter via the Modbus RTU gateway, so that information on surplus power from the photovoltaic system can be evaluated without an additional meter. Any other use may damage the P1 digital meter interface. Before commissioning, read the AC•THOR installation instructions and the operating manual available online carefully. Connect the RJ12 plug of the interface to the right-hand socket of the electricity meter P1. Connect the Modbus RTU gateway of the AC•THOR to the terminal block of the interface using a shielded three-core cable (length: max. 1000 m). Connect points A and B on the AC•THOR side of the cable with the supplied 120 Ω resistor.

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    69,99 €

    inkl. MwSt.

  • Last items in stock My - PV Screw-in Heating Element 3kW

    My-PV My-PV Screw-in Heating Element 3kW

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    The My-PV screw-in heating element 3kW is a heating element for installation in fresh-water and buffer tanks. It was developed in particular for use with the AC THOR photovoltaic power manager and is the easiest way to increase self-consumption of solar power. It is aimed at operators of photovoltaic systems who want to use surplus power for hot-water preparation. Highlights Continuously adjustable: Control is provided by the photovoltaic power manager AC THOR or AC THOR 9s. Adjustable target temperature: The desired hot-water temperature can be set with a rotary knob (bimetal thermostat). Standby mode: The AC THOR detects the shutdown and automatically switches to standby mode for minimal self-consumption. Safety: A compliant safety temperature limiter is integrated. Gentle design: The special design results in very low thermal surface loads on the heating elements and contributes to product service life. Standard thread: The standard 1.5-inch thread makes installation easier. Technical specifications Description Value Heating output 0 - 3,000 W Grid connection Single-phase, earthing-contact plug, 230 V, 50 Hz Protection rating IP45 Connection cable 2.8 m Dimensions (W x H x D) 88 x 88 x 518 mm Thread 1.5-inch standard thread Who is it for? The screw-in heating element is suitable for users who heat fresh water or buffer tanks with solar power and use a My-PV photovoltaic power manager AC THOR or AC THOR 9s for this. For projects with higher temperatures, for example when a buffer tank is to be charged to above 90°C, versions without a thermostat, with only a safety temperature limiter, are also available according to the description. The temperature sensor supplied with the AC THOR and AC THOR 9s then ends the heating process. We will gladly advise you personally: phone +49 931 760 260 40 or e-mail at kontakt@energie24.shop. Pickup at our Veitshöchheim warehouse is possible by arrangement.

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    189,99 €

    inkl. MwSt.

  • My-PV Screw-In Heating Element 9kW

    My-PV My-PV Screw-In Heating Element 9kW

    Incoming stock  Voraussichtliche Lieferzeit

    The easiest way to higher self-consumption. The 3 kW screw-in heating element was developed specifically for use with the AC•THOR photovoltaic power manager, and the 9 kW screw-in heating element for use with the AC•THOR 9s photovoltaic power manager. The screw-in heating elements can be installed in fresh-water tanks and buffer tanks. Their special design results in very low thermal surface loads on the heating elements, which directly extends the product's service life. Continuously adjustable via the AC•THOR or AC•THOR 9s photovoltaic power managerThe desired hot water temperature can be set with a rotary knob. The AC•THOR or AC•THOR 9s detects the shut-off and automatically switches to standby mode for minimal self-consumption. A safety temperature limiter that complies with regulations is of course integrated. Some projects, however, call for higher temperatures, for example when a buffer tank is to be charged to above 90°C. For this purpose, the screw-in heating elements are also available without a thermostat, with only the safety temperature limiter. To end the heating process, the temperature sensor supplied with the AC•THOR and the AC•THOR 9s must then always be used. Advantages With manually adjustable target temperature (bimetal thermostat) 1.5-inch standard thread Single-phase or three-phase Optionally without a thermostat, with only the safety temperature limiter Technical specifications 9kW Heating power: 0 - 9,000 W Grid connection: Three-phase, 3x230 V 50Hz Protection rating: IP45 Connection cable: 2.8 m Dimensions (W x H x D): 88 x 88 x 873 mm

    Incoming stock  Voraussichtliche Lieferzeit

    324,99 €

    inkl. MwSt.

  • My-PV Immersion Heating Element 1.5"

    My-PV My-PV Immersion Heating Element 1.5" - 230V - 3 kW / WITHOUT THERMOSTAT

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    The easiest way to higher self-consumption. The 3 kW screw-in heating element was developed specifically for use with the AC•THOR photovoltaic power manager, and the 9 kW screw-in heating element for use with the AC•THOR 9s photovoltaic power manager. The screw-in heating elements can be installed in fresh-water tanks and buffer tanks. Their special design results in very low thermal surface loads on the heating elements, which directly extends the product's service life. Continuously adjustable via the AC•THOR or AC•THOR 9s photovoltaic power managerThe desired hot water temperature can be set with a rotary knob. The AC•THOR or AC•THOR 9s detects the shut-off and automatically switches to standby mode for minimal self-consumption. A safety temperature limiter that complies with regulations is of course integrated. Some projects, however, call for higher temperatures, for example when a buffer tank is to be charged to above 90°C. For this purpose, the screw-in heating elements are also available without a thermostat, with only the safety temperature limiter. To end the heating process, the temperature sensor supplied with the AC•THOR and the AC•THOR 9s must then always be used. Advantages With manually adjustable target temperature (bimetal thermostat) 1.5-inch standard thread Single-phase or three-phase Optionally without a thermostat, with only the safety temperature limiter Technical specifications 3kW Heating power: 0 - 3,000 W Grid connection: Single-phase, earthed (Schuko) plug, 230 V, 50 Hz Protection rating: IP45 Connection cable: 2.8 m Dimensions (W x H x D): 88 x 88 x 518 mm

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    239,99 €

    inkl. MwSt.

  • My-PV Immersion Heating Element 1.5"

    My-PV My-PV Immersion Heating Element 1.5" - 3x230V - 9 kW / WITHOUT THERMOSTAT

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    The easiest way to higher self-consumption. The 3 kW screw-in heating element was developed specifically for use with the AC•THOR photovoltaic power manager, and the 9 kW screw-in heating element for use with the AC•THOR 9s photovoltaic power manager. The screw-in heating elements can be installed in fresh-water tanks and buffer tanks. Their special design results in very low thermal surface loads on the heating elements, which directly extends the product's service life. Continuously adjustable via the AC•THOR or AC•THOR 9s photovoltaic power managerThe desired hot water temperature can be set with a rotary knob. The AC•THOR or AC•THOR 9s detects the shut-off and automatically switches to standby mode for minimal self-consumption. A safety temperature limiter that complies with regulations is of course integrated. Some projects, however, call for higher temperatures, for example when a buffer tank is to be charged to above 90°C. For this purpose, the screw-in heating elements are also available without a thermostat, with only the safety temperature limiter. To end the heating process, the temperature sensor supplied with the AC•THOR and the AC•THOR 9s must then always be used. Advantages With manually adjustable target temperature (bimetal thermostat) 1.5-inch standard thread Single-phase or three-phase Optionally without a thermostat, with only the safety temperature limiter Technical specifications 9kW Heating power: 0 - 9,000 W Grid connection: Three-phase, 3x230 V 50Hz Protection rating: IP45 Connection cable: 2.8 m Dimensions (W x H x D): 88 x 88 x 873 mm

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    355,00 €

    inkl. MwSt.

  • My-PV ELWA / PV Water Heater, Rated Power DC 2kW

    My-PV My-PV ELWA / PV Water Heater, Rated Power DC 2kW

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    The My-PV ELWA is a 2 kW photovoltaic water heating device. Direct current from photovoltaic panels is fed straight into the built-in heating element and converted into heat immediately and without loss. It is aimed at PV system owners who want to heat water directly with solar power. Highlights Direct heat generation: The direct current from the PV panels goes straight into the built-in heating element. Built-in MPP tracker: It ensures that the PV array is always operated at its optimum operating point, similar to a PV inverter. Off-grid operation: No connection to the power grid is required for operation; the device is powered by the PV array. Easy operation: The desired hot water temperature is set with a rotary knob. Status display: LED indicators show the current device status. Technical specifications Description Value Type PV water heating device Rated power DC 2kW Operating mode purely off-grid operation, no grid connection required Operation Rotary knob, LED indicators Who is it for? The device is suitable for owners of a photovoltaic system who want to use solar power for water heating without detouring via the household grid. We will gladly clarify with you in advance which panel configuration fits. Since no grid connection is required, the device can also be used where only a PV array is available. Control is handled by the built-in MPP tracker, and you set the hot water temperature with the rotary knob. We are happy to advise you personally: phone +49 931 760 260 40 or email kontakt@energie24.shop. Pickup at our Veitshöchheim warehouse is possible by arrangement.

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    639,99 €

    inkl. MwSt.

  • My-PV ELWA Modbus Interface for ELWA

    My-PV My-PV ELWA Modbus Interface for ELWA

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    The ELWA Modbus interface acts as the link to a Modbus bus system. Because of the bus capability, bus addresses must be assigned when several devices are operated. The ELWA Modbus interface can be used with all ELWA devices with firmware version 1.30 or higher. Devices with serial numbers lower than 120100160810xxxx are equipped with earlier firmware versions.

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    112,00 €

    inkl. MwSt.

  • My-PV Temperature Sensor AC-THOR

    My-PV My-PV Temperature Sensor AC-THOR

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    The AC•THOR can also take over water heating and ensure the desired water temperature. The my-PV temperature sensor is required for this. Three single-phase heating elements can be connected, each of which can be equipped with its own temperature sensor. One temperature sensor is always included in the scope of delivery of the AC•THOR; additional sensors may have to be purchased separately.

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    40,50 €

    inkl. MwSt.

  • My-PV USB Interface for all ELWA / AC ELWA / PLA Devices My-PV USB Interface for all ELWA / AC ELWA / PLA Devices

    My-PV My-PV USB Interface for all ELWA / AC ELWA / PLA Devices

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    The ELWA USB interface is intended exclusively for operation with the electric water heating devices of the ELWA series. It creates the connection between a Windows PC and the internal IR interface. For this, a licence-free "Virtual Com Port Driver" from FTDI® must be installed on the PC.

    Out of stock  Delivery time depends on the product. Freight shipments take longer, by appointment. Items marked “To order” are only ordered from the manufacturer and may therefore be delayed.

    112,00 €

    inkl. MwSt.

  • My-PV WiFi Meter / Wi-Fi Energy Meter incl. 3x Clamps 75A

    My-PV My-PV WiFi Meter / Wi-Fi Energy Meter incl. 3x Clamps 75A Current Transformers (Split-Core)

    Available to order  Voraussichtliche Lieferzeit

    The my-PV WiFi Meter maximizes the self-consumption of your PV system in the simplest possible way. The my-PV WiFi Meter analyzes the power flows of the photovoltaic system. my-PV devices receive information wirelessly from the WiFi Meter. As a result, only the energy that is currently available is used for heat generation. There is therefore no feed-in to the power grid at all: PV self-consumption is maximized and the public low-voltage grid is relieved. The my-PV WiFi Meter is installed in the distribution cabinet directly after the utility's meter and measures the load flow via three external split-core current transformers. Configuration is very easy via a web interface.

    Available to order  Voraussichtliche Lieferzeit

    272,99 €

    inkl. MwSt.

  • SolarEdge SolarEdge Home Hot Water Controller 3 kW

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    Maximizes self-consumption by storing surplus solar energy as hot water.

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    268,00 €

    inkl. MwSt.

  • SolarEdge SolarEdge Home Hot Water Controller 5 kW

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    Maximizes self-consumption by storing surplus solar energy as hot water.

    Deliverable in 7–14 working days  Voraussichtliche Lieferzeit

    314,50 €

    inkl. MwSt.

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