my-PV AC ELWA 2 water heaters up to 3.5 kW for grid-connected PV systems

The AC ELWA 2 from my-PV (MPN: 16-0150 ) is a 3.5 kW, flexibly controlled water heater for grid-connected PV systemsthe successor to the ELWA-E uses surplus photovoltaic energy to optimize your self-consumption and increase self-sufficiency. This automatically reduces your operating costs. Thanks to the infinitely variable control, the surplus energy is used optimally. Even when there is little sunshine, it ensures a constant supply of hot water by using the public power grid. The device can be installed in both hot water and buffer storage tanks. The my-PV Cloud is available to help you keep track of everything and respond quickly. In off-grid applications, the ELWA 2 can operate in frequency mode. It is compatible with leading brands such as Victron Energy, Growatt, Huawei, Studer, and SMA.

about the water heater

• Stepless control from 0-3.5 kW, depending on PV surplus
• Frequency mode in the off-grid sector
• External expansion with a 3 kW heating element
• Can be installed in hot water and buffer tanks
• Optional hot water supply
• Everything at a glance—thanks to my-PV Cloud
• Fixed wiring – no cable with Schuko plug
• Easy operation thanks to touch display
• Many different communication options
• Compatible with manufacturers such as Victron, Growatt, and Huawei

German Design Award Winner 2024

"The AC ELWA 2 converts surplus solar power into hot water, thereby increasing self-sufficiency. A useful product that clearly expresses its high-tech and performance standards with its clear and dynamic design language." With these words, the jury of the renowned award praises the continuously adjustable hot water heater for grid-connected photovoltaic systems.

Functional modes in various combinations

...with WiFi Meter
In combination with the my-PV WiFi Meter, the AC ELWA 2 uses only the surplus energy from your photovoltaic system. The heating element regulates its output continuously, so that almost no energy is fed into the grid and your own consumption is maximized. The connection to the router is easy via a patch cable or wirelessly via WLAN.

... with battery storage
The water heater is compatible with many well-known battery storage systems and optimizes the use of your PV yield. First, the battery storage is charged. Once it is full, the AC ELWA 2 efficiently stores the surplus energy as hot water. Water is a particularly cost-effective storage medium and can be ideally supplemented with chemical storage batteries. This way, the electricity you generate stays with you and is not fed into the grid.

...with Smart Home
Thanks to its open system control, the AC ELWA 2 can communicate seamlessly with commercially available smart home and energy management systems. Your smart home system takes over the control, so that even complex controls with priority settings for different consumers are possible. In residential construction, this technology enables the cooperation of several devices. Remote monitoring and energy cost billing at the apartment level can be easily implemented.

No sun, but still hot water?

With the optional hot water supply, the ELWA 2 ensures a reliable hot water supply even in bad weather. Simply and conveniently plug it into a power outlet. No grid feed-in is required, so no metering point is necessary. Enjoy a convenient and reliable hot water solution, even in bad weather.

Areas of application

Single-family home – The water heater is the perfect solution for your hot water tank. It works completely independently of the power grid, ensuring a continuous supply of hot water even during power outages. Thanks to its extremely low starting current, the ELWA 2 starts up even with minimal sunlight, impressively underlining its outstanding performance and reliability.
In residential buildings – With decentralized storage and hot water preparation, you avoid the usual energy losses in the pipes and enjoy hygienically treated hot water at the same time. The AC ELWA 2 impresses with its particularly high solar coverage ratio.

my-PV Cloud

With the my-PV Cloud, you can keep an eye on your sustainable and cost-efficient heat generation at all times – in real time. The live view shows you the current output, the collected daily energy, and the history of temperature and charging power. Your customizable dashboard gives you quick and clear access to all important information. Remote settings are also possible at any time.

• surplus from the PV system
• Power usage
• Water or heating temperature development
• Level of grid feed-in and grid consumption
• Device power/PV power
• Temperature display

Technical

• Heating output: 0-3500W + 16A switching output
• Fuse protection: 13A or 16A
• Mains connection: 3-pole terminal, 2.5mm² 230V, 45-65Hz
• Standby consumption: <1.5W
• Efficiency: 99.3% at rated power
• Starting torque: 50Nm
• Max. operating pressure: 10 bar
• Communication interfaces: LAN, WLAN, RS485, PWM
• Operating temperature range: Ambient temperature at housing 0°C - 40°C
• Storage temperature: -20°C to +70°C
• Protection class: IP21
• Weight: 2 kg
• Dimensions: 580 x 133 x 177 mm

Scope of delivery

1x my-PV AC ELWA 2 water heater
1x accessory box