Introduction
The WARP Charger or WARP Energy Manager can directly access data from other third-party devices.
This includes data from energy meters (for example at the grid connection), data from PV inverters about current generation, as well as data on battery storage power or power consumption data from loads. The read data can be used by a WARP Charger or WARP Energy Manager to control chargers (PV excess charging), for PV excess utilization of a heat pump, or for dynamic load management.
The WARP Energy Manager additionally records the collected data locally on its SD card. Via the web interface, the recorded data can be analyzed in the Energy Analysis.
To access the data, we depend on the interfaces provided by the respective device manufacturer. Depending on the device and manufacturer, the appropriate interface must be configured in the web interface under Energy Meters on the WARP Charger or WARP Energy Manager.
The list of compatible devices can be found here: List of Compatible Devices
Measurement Location of Device Data
We distinguish between four different measurement locations for data sources. These are listed below. Some devices support multiple measurement locations simultaneously. For example, there are hybrid inverters that provide data for all four measurement locations.
The measurement locations are used to assign and consolidate individual data sources and to create an energy overview from them.
Energy meters without a fixed role can be manually assigned to a measurement location. Thus, an energy meter can be installed to measure, for example, the load. It is also possible to install an energy meter at the grid connection and assign it the measurement location "Grid Connection" if no readable energy meter is available.
Grid Connection
If a PV system is already installed, a meter ("smart meter") is usually also installed at the grid connection. This is then connected to the PV inverter and can often be read via the inverter. We support various ways to access these meters.
PV
PV inverters (including hybrid inverters) often provide data on their current PV generation.
Battery Storage
A hybrid inverter is a combination of a photovoltaic inverter and a battery inverter. These inverters often provide not only data on PV generation but also data on the current battery power (charging/discharging). There are also pure battery inverters that can be accessed.
In the future, control of the storage will also be possible for many models.
Load
To capture where the generated power flows, there is the measurement location "Load". Some inverters also have a readable load output.
Applications
PV Excess Charging
For PV excess charging, the WARP Charger or WARP Energy Manager must have access to an energy meter at the Grid Connection (Grid), as only there can the actual PV excess be determined.
For PV excess charging, an energy meter must be configured that contains at least the following value: Active Power (Import minus Export); Σ L1, L2, L3 [W]
This value is used for control. Additional values can be configured but are not technically necessary.
If a battery storage is additionally available and can also be read, it makes sense to also configure it so that PV excess charging can take it into account.
PV excess charging controls the sum of active power so that excess power is charged into a vehicle instead of being fed back into the power grid.
Dynamic Load Management
For dynamic load management, the WARP Charger or WARP Energy Manager must have access to an energy meter at the Grid Connection (Grid), as only there can the current phase currents be determined.
For dynamic load management, an energy meter must be configured that contains at least the following values:
- Current (Import minus Export); L1 [A] or Current (Import plus Export); L1 [A] or Current (Import); L1 [A]
- Current (Import minus Export); L2 [A] or Current (Import plus Export); L2 [A] or Current (Import); L2 [A]
- Current (Import minus Export); L3 [A] or Current (Import plus Export); L3 [A] or Current (Import); L3 [A]
These values are used for control. Additional values can be configured but are not technically necessary. Whether "Import", "Import minus Export", "Import plus Export" must be selected depends on the respective energy meter. This can be tested if in doubt.
Dynamic load management controls charging processes so that the maximum configured phase current is not exceeded on any phase (L1, L2, L3).
Battery Control
For controlling battery storage, there is a dedicated page: Battery Storage