{"id":1692,"date":"2023-04-27T15:14:58","date_gmt":"2023-04-27T13:14:58","guid":{"rendered":"https:\/\/logikeditor.de\/?post_type=best-practice&p=1692"},"modified":"2023-06-15T16:35:07","modified_gmt":"2023-06-15T14:35:07","slug":"balkon-pv-ueberschuss-fuer-zusatzverbraucher","status":"publish","type":"best-practice","link":"https:\/\/logikeditor.de\/en\/best-practice\/balkon-pv-ueberschuss-fuer-zusatzverbraucher\/","title":{"rendered":"Balcony PV surplus for additional consumers"},"content":{"rendered":"

Use balcony PV energy surplus<\/span><\/strong><\/h2>\n

Step by step.<\/span><\/strong><\/p>\n<\/div><\/div>

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<\/i>Associated logic group \"Balcony PV surplus energy<\/span><\/a><\/div>

If you have invested in a balcony PV system, you will probably find that at the time of energy production, more energy is generated than the household currently needs. Where to put the surplus energy? Those who already have an energy storage system can store this surplus for later without having to worry about the profitability of the storage. For those who feed surplus energy into the grid, it will be remunerated, but probably not adequately.<\/p>\n<\/div><\/div>

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How can consumption be sensibly adapted to energy production? <\/strong>
\nNowadays, households have a 3-phase electricity grid. The energy connection meter records the total energy as a sum across all phases. Despite energy balancing across the phases, there will be a PV energy surplus at time intervals. One can adjust to the sun and run consumers when the sun is shining. A sensible option is to switch on energy-dependent consumers that offer an additional benefit. For example, one can use the surplus energy to heat with an infrared panel, operate an air filter or use a pond or pool aeration (filter).<\/p>\n

The following example generates a switching pulse when there is an energy surplus in order to switch consumers or a socket. When the surplus is over, the switch-off takes place according to further specifications.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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What is needed?
\n<\/strong>The current total consumption of the household can be read in quite easily as a KNX measured value via an opto-coupler from the house connection meter. Other solutions are couplers or additional meters that make the power value available in the local network. These possibilities are, for example, the Shelly-EM measuring transformer or TASMOTA radio modules, where the measured values are queried via http request and transmitted to the KNX (see separate info sheet). The provision of values and the creation of switching thresholds for controlling the additional consumer is carried out in a logic group in the EIBPORT. In order to be able to use different consumers as required, the switching threshold must be changeable. The consumer (socket) is switched via a KNX switch actuator.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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For the evaluation, setting of parameters and display, the visualisation of the EIBPORT<\/strong> \"Control L<\/strong>\" used. Control L<\/strong> is web-based and can thus be run independently on mobile devices. To realise the above application, a logic group must be configured. For this purpose the LOGIK<\/strong>EDITOR at the EIBPORT<\/strong> and the logic group can be imported or created.<\/p>\n

Logic elements are required for the logic group and can be selected under \"+ Add\".<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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<\/i>To the logic group<\/span><\/a><\/div>
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The following 2 input values must be taken into account:<\/p>\n

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  1. The Release LG<\/strong>: This function enable of the logic group stops the cyclic transmitter.<\/li>\n
  2. The Additional service W<\/strong>: This adjustable power value determines the switching threshold for the additional consumer. The value depends on the consumption of the additional load to be switched, such as an IR heating plate (200 W), an air purifier (160 W) or a ventilation pump (50 W).<\/li>\n<\/ol>\n<\/div><\/div><\/div><\/div><\/div>
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    The function elements used in the example are:<\/p>\n