EMS "Wattster One" in front of a granite wall

Wattster: Connecting to the future

Our energy management system enables simple AC connection to almost any household grid. This is because the Wattster turns an existing cable into an AC cable for feeding in the PV power. Plus: The bridge also eliminates the RS485 cable from the inverter to the meter.

Smart interaction

In combination with a wireless data connection to the meter, the SIMPLUG feed-in technology developed by Wattando ensures that the maximum permissible current carrying capacity of the feed-in line is not exceeded at any time with Wattster.

The required data from the domestic grid comes via a secure wireless connection from a non-invasive measuring sensor on the main distribution board. The system is optimized with a second sensor on the line into which the power is fed.

Wattster uses this information to control the inverter via the RS485 interface. The feed-in is carried out in accordance with the regulatory requirements and the local parameters of the electrical installation. This enables national specifications for zero feed-in such as customer-specific models of net metering and - if a battery is connected - peak shaving.

The abstract diagram schematically illustrates how Wattando's Wattster energy management system works. The solar modules are connected to the inverter. Optionally, a battery can branch off from the inverter. Only the ready-to-plug-in Wattster box is connected between the inverter and the house grid without any intervention. In this way, the electricity enters the house circuit without having to rebuild the grid meter or lay new cables.
The EMS Wattster in an abstract view

For significantly less installation effort than with conventionally connected PV systems

The Wattster Set

Market launch: Q2/2024

Book without obligation
Inverter / home storage

Huawei SUN & LUNA

At product launch, Wattster is compatible with HUAWEI's residential portfolio of inverters. This means high flexibility for single-phase and three-phase systems, with and without battery.

  • Wattster supports in principle all common inverters of numerous well-known manufacturers with SunSpec Modbus interface (example picture: a model of Huawei)
  • Detailed information on models and services will follow at product launch
Inverter Huawei SUN 2000 5KTL
Smart Sense+ 1/RM
Smart Sense+ 1/RM
Smart Sense+ 1/S
Smart Sense Pro+ 1/S
Hall Sense 1/C
Smart Sense+ 3/RM
Smart Sense Pro+ 3/RM
Smart Sense+ 3/S
Smart Sense Pro+ 3/S
Hall Sense 3/C

Smart Senses and Hall Senses

To ensure that you remain flexible at the customer's site, we offer numerous monitoring solutions with our Smart Senses for recording on the house network. These range from analog current clamps to digital electricity meters for the DIN rail. A special feature is our pluggable solution (Smart Sense+ 1 or 3/S). You can install these directly on the circuit breaker or between the supply terminal and the main fuse.

  • 1-phase sensors: Smart Sense+ 1/RM and Smart Sense+ Pro 1/RM, Smart Sense+ 1/S and Smart Sense Pro+ 1/ and Hall Sense 1/C
  • 3-phase sensors: Smart Sense+ 3/RM and Smart Sense+ Pro 3/RM, Smart Sense+ 3/S and Smart Sense Pro+ 3/ and Hall Sense 3/C

Four steps.
That's how fast and easy integration is now:

Set the feed socket

Up to 7 kW Wieland or comparable feed-in sockets (in Germany single-phase feed-in limited to max. 4.6 kW), for higher powers: CEE plug connections

Install the system components

Set PV modules, inverters, Wattster and selected measurement sensors incl. bridge at the main distribution and/or at the sub-distribution.

Configure with the Wattster app

Specification of the system: installed components, meter type, control profiles, fuse rating and other local parameters of the electrical installation.

Put into operation

When the inverter is switched on, the system is in operating mode and can feed electricity into the domestic grid

With these connections directly into the AC house network

Frontal view of a Wieland socket as a power feed socket, which must be replaced with a household socket.

From 1 kW to 7 kW

For the solar system on the garden shed, on the carport or on the roof, an existing household socket is replaced by a feed-in socket. For a specialist, this is a matter of five minutes. Apart from the non-invasive installation of measuring sensors on the phase(s), there is no need for any further intervention in the electrical installation.

Frontal view of a CEE power connection with open protective flap as a power feed socket up to 70 kW

From 3 kW to 70 kW

As soon as a three-phase power connection (CEE plug) is available or planned, Wattster enables the pluggable integration of solar systems from 3 kW Watt to 11 kW. For outputs above 11 kW, there will be the Wattster 3XL solution. Interesting for private households as well as for commercial properties.

One app for startup.
And one for every day.

Wattster App - The overview pages of the Wattster Pro for professionals and the end user app are shown.

for once

The Wattster Pro app guides you through the commissioning of the system and inverter in clear, comprehensible steps:

  • Automatic recording of the specifications of all components (serial number, model number, performance data, etc.)
  • Adaptation of the system to local parameters of the electrical installation
  • via web browser, soon also available as native app for iOS and Android

Energy monitor
for every day

Wattster Home offers your customers a compact overview:

  • on the production
  • the quota of own consumption
  • theCO2 emissionssaved
  • the current consumption
  • the data of the connected memory
  • and much more

A special highlight: The Wattster app works on all end devices with WLAN. Even as an application directly in the browser or completely offline: A ready-to-plug-in system with the WATTSTER Box can always be put into operation.

Technical specifications

For single-phase supply from 800 watts to 7kW
For the three-phase supply from 3 kW to 11kW
185-250 VAC, 50/60 Hz
max. 10 W
from -20 °C to 40 °C
Plastic (PC); RAL 7035
275 mm x 150 mm x 85 mm
IP 65
1x RJ45 for Ethernet
2x for RS485 Modbus RTU
4x Bi-Color LED
USB port
SD card slot
Ethernet 10/100
RS485 half-duplex (inverter)
433 MHz LoRa radio chip
Dual WiFi 802.11b/g/n (client mode, access point)
Bluetooth 4.2 BLE
Spring-loaded terminal connections for PE, N, L 1-3 (mains and inverter side),
Terminal connections RS485
2x M25 cable gland
2x M20 cable gland
Bridge (provides wireless data connection to the house installation)
3.8 -32 VDC via USB port or Micro-MaTch
max. 10 W
from -20 °C to 40 °C
Plastic (ABS, UL94V-0, fire-resistant); off-white
100 mm x 68 mm x 22.5 mm
IP 20
1x SMA antenna connection
2x Micro-MaTch for RS485 Modbus RTU (Main/Secondary)
1x Power LED
1x USB-2.0 connection
1x Micro USB-A connection (Power only)
3x 3.5 mm jack connections for Hall Sense
1x RJ45 for S0 sensor
1x RS485 half-duplex
1x 433 MHz LoRa radio chip
1 x USB-2.0
2x Micro-MaTch RS485
1x USB-2.0 connection
1x Micro USB-A connection (power only)
(preliminary, subject to change)