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Integriertes PV-Überschussladen mit poweropti von powerfox
Funktionsprinzip & Kompatibilität: PV Überschussladen mit poweropti von powerfox
Vorteile & Installation des poweropti von powerfox
Integrated PV Surplus Charging with Poweropti by Powerfox
All new and existing DaheimLaden wallboxes (including those already delivered in the past) come with a free feature upgrade for direct, targeted PV surplus charging via the DaheimLaden Cloud. This is controlled through the DaheimLaden app and online portal without detours.
The PV surplus charging function of DaheimLaden wallboxes is independent of the inverter, making it suitable for both upgrading existing older systems (which may lack modern software features and interfaces) and installing new systems with inverters from any manufacturer.
DaheimLaden wallboxes meet the requirements of the KfW 442 “Solar Power for Electric Cars” funding program and have been classified by KfW as eligible wallboxes.
You can find all details and features of the DaheimLaden wallboxes with 11kW or 22kW output here.
Functionality & Compatibility: PV Surplus Charging with Poweropti by Powerfox
The PV power you generate is supplied to your home and its consumers via the inverter. During this process, all active electricity consumers in the house are supplied first. Any unused electricity is fed into your grid operator’s network. The amount of electricity fed into the grid is measured by the bidirectional three-phase meter. For the electricity fed into the grid, you receive a feed-in tariff from your grid operator. Currently, the feed-in tariff for new PV systems is approximately 7–8 cents per kWh.
Instead of selling electricity to your grid operator, the PV surplus charging function of the DaheimLader allows you to direct that electricity straight into your electric vehicle.
To enable direct PV surplus charging, a power sensor (Smart Energy Meter) — the poweropti by Powerfox — is required.
The poweropti is available in three variants, compatible with over 95% of three-phase meters, and costs between €89.95 and €99.95. The poweropti is installed as a smart meter sensor on your three-phase meter.
It continuously monitors the electricity purchase and sale of your meter. Using its Wi-Fi antenna, the poweropti transmits the respective electricity values. The DaheimLaden wallbox software, through the existing internet connection of the wallbox, can use the consumption values from the poweropti in real-time.
This eliminates the need for additional wiring between the power sensor and the wallbox with a control cable. For PV management, both the poweropti by Powerfox and the DaheimLaden wallbox only need to be connected to your router.
Based on this, the charging process can then be automatically and precisely controlled.
To ensure as continuous a charging process as possible and to avoid frequent short starts and stops, the wallbox control normalizes the consumption values over a 2-minute time window.
You can order the poweropti by Powerfox directly from powerfox.
Benefits & Installation of the poweropti by powerfox
The Poweropti by Powerfox is a smart energy meter equipped with a Wi-Fi interface that can continuously read data from your three-phase meter (current electricity purchase or feed-in). This eliminates the need for individual measurement of inverter data. With this solution, all PV systems (inverters), regardless of their age or manufacturer, can be made compatible with PV surplus charging.
Through the Poweropti’s Wi-Fi internet connection, information about the PV surplus can be seamlessly transmitted to the DaheimLaden portal in the cloud without requiring any additional components.
The Poweropti by Powerfox also offers exceptionally easy installation. If your DaheimLader is already installed, you don’t need an electrician for the installation of the power sensor—you can install it yourself! Here, you’ll find a quick guide to the installation requirements and step-by-step instructions.
During installation, the Poweropti by Powerfox is simply attached to the correct position on the three-phase meter using its magnet.
Next, you need to connect the 230V power supply of the Poweropti by Powerfox and attach the Wi-Fi antenna. In the final step, you can set up your Powerfox account and use the Powerfox app to connect the Poweropti to your Wi-Fi.
For reading the electricity meter, you may require a security PIN from your grid operator. This PIN is usually sent to you by mail free of charge within 2-3 days.
Prerequisites and Wallbox software status
To ensure everything runs smoothly from the start, please make sure that the wallbox has a stable internet connection. This can be achieved either through LAN (minimum CAT6) or a strong Wi-Fi signal. To fully utilize all features, ensure the following wallbox firmware versions are up to date:
You can find the software version displayed in the bottom-right corner of the wallbox screen. For PV surplus charging, we recommend the following software versions:
DaheimLader Smart: Minimum AC_SCE_3.17DA
DaheimLader Touch: Minimum AC_DG3_1.19
If your DaheimLader Touch does not have the required software, please press the “Update” button located in the “Settings” menu in the bottom-left corner.
If your DaheimLader Smart requires an update, please contact our customer service via email at info@daheimladen.de. Be sure to include the serial number of your wallbox, which is displayed on the wallbox screen.
Setting up integrated PV-surplus charging
To activate the PV mode of your wallbox, you will need your Powerfox login credentials. Therefore, the first step is to complete the installation of your Powerfox poweropti. Please note that most three-phase meters are protected with a PIN, and regular data updates are only possible with this PIN. You can obtain the PIN from your grid operator.
Notes on Setting Up the Powerfox:
Installation & Orientation of the Sensor:
Follow the installation instructions strictly and ensure that the Powerfox is mounted correctly on the three-phase meter (pay attention to the white arrow on the housing, which must point upwards).
QR Code for Powerfox Setup:
Use the QR code found inside the packaging of the Powerfox poweropti. The QR code on the outer packaging of the device cannot be used for pairing.
Measuring Feed-In Power:
For PV surplus charging, the feed-in measurement must be enabled in the Powerfox poweropti. To activate this, go to the Powerfox app, then navigate to Settings > Registered Devices. Click on the gear icon for the poweropti and enable the option “To measure feed-in power”. Save the changes.
Activating Data Transmission:
Enable the data transmission from the Powerfox poweropti to the wallbox. In the Powerfox app, go to Settings > Data and Notifications and activate “Automatic transmission of consumption data (meter readings)” and “Automatic transmission of operating data.”
Once you have set up the Powerfox, you can enter your login credentials in the “PV Charging” menu of the DaheimLaden app or online portal.
To do this, click on your account settings in the top-right corner and open the PV surplus charging mode.
Now, enter your credentials for the Powerfox poweropti and assign a wallbox from your account that should use the PV surplus.
After saving your credentials, the DaheimLaden Cloud will regularly receive your PV output data from the Powerfox poweropti. Please check the dashboard of the DaheimLaden app to ensure updates are displayed regularly (“Data last received”).
You can easily activate and deactivate the PV mode using the on/off toggle switch.
Operating Modes for PV surplus charging
Once the Poweropti is activated in the app, you can choose from three different modes (the options will only appear if a Powerfox account is linked):
No PV Mode: In this mode, the wallbox charges using the set charging power without considering Powerfox data.
PV Only Mode: In this mode, the wallbox charges exclusively with PV electricity. A minimum PV output of 6A per phase is required.
For a single-phase plug-in hybrid, the minimum charging power is at least 1.37 kW.
For a fully electric vehicle with a three-phase AC charging system, the minimum charging power is 4.1 kW.
The charging power adjusts dynamically based on the PV output during charging. If a battery storage system is present, it will be fully charged in the house first, and the charging process will start afterward.
partial PV-Mode: In this mode you have to define the minimum PV surplus required to start charging and the maximum power (in kW) that may be drawn from the grid.
Settings PV-surplus charging:
Using the slider, you can set the PV surplus level required to start the charging process. By default, the settings assume a 3-phase charging process. If you are charging a vehicle using one or two phases, or if you are using an external load disconnect switch, you can adjust the number of phases in the wallbox settings. This adjustment reduces the minimum charging power to 1.3 kW for single-phase charging or 2.7 kW for two-phase charging.
To adjust the minimum charging current for PV mode, you can now specify the number of used phases in the “Settings” of the wallbox. This input is solely for configuring the PV mode and accurately converting charging power from amperes to kilowatts. It does not affect the operation of the wallbox itself (the output power will still correspond to the number of phases requested by the vehicle).
Settings for partial PV-Charging:
With the two sliders, you can define the PV surplus level required to start the charging process. Additionally, you need to specify the amount of electricity that can be purchased from the grid. It’s important to ensure that the minimum charging current required by the vehicle is met (usually 6A; vehicles from the Renault family (Zoe/Twingo) or the Smart EQ require 8A).
Minimum Charging Current for PV Surplus Charging
The DaheimLader wallbox does not feature software-based phase switching. Our stress tests have shown that the use of software-based switching places significant strain on the contactor of the wallbox (the only mechanical component), reducing the wallbox’s lifespan considerably. Additionally, many vehicles only partially support software-based phase switching and may enter a fault mode after switching.
We therefore recommend the use of physical load disconnect switches (e.g., 3 x ABB SHD201/16), which allow the wallbox to be manually switched between winter and summer modes.
This enables the load range for PV surplus charging to be adjusted appropriately to the PV system. For pure PV charging, the following minimum PV charging currents apply:
Single-phase operation: 1 x 6A / 1.37kW - 1 x 16A / 3.65kW
Two-phase operation: 2 x 6A / 2.74kW - 2 x 16A / 7.3kW
Three-phase operation: 3 x 6A / 4.1kW - 3 x 16A / 11kW
Integration of a Battery Storage System with Discharge Protection
We also offer a feature to protect your battery storage from over-discharge. You can decide how much energy from your battery is used for charging your electric vehicle. During a self-defined interval, the charging process is briefly interrupted with a 0A control command. The PV manager then checks how much electricity can be fed into the grid at that moment before resuming the charging process. If electricity was drawn from your battery in the meantime, it will first be replenished before charging continues. This results in a smooth, balanced charging curve.
To avoid unnecessary frequent charging and discharging cycles and to handle the battery with care, the battery check can be set at intervals of 30 minutes, 60 minutes, or 120 minutes.
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