Forecasting loading: Use clean and cheap solar power optimally

Forecasting loading: Use clean and cheap solar power optimally-clean

Electromobility is the current political answer to the progressive climate change. The traffic of the future should not strengthen climate change and, above all, protect valuable resources. For this, the electric car needs a good climate balance. For example, if E cars continue to load electricity from fossil energy sources, this purpose is not fulfilled. The charging management to design that as much green flow is loaded, is an important step. Loading the electric car with electricity produced is the most sustainable option.

Through renewable energy law, many households and companies have installed PV systems that produce 54 GW electricity in Germany (booth 2020). The falling feed-in tariff and at the same time increasing electricity costs are currently making it cheaper to consume the electricity itself.

The integration of the solar power in the charging process is therefore essential to load as cheap and sustainable as possible. The combination of the PV system with an electric car is worth it – this increases the self-consumption of the solar power and the vehicle loads resource-saving with the power of the sun.

However, the problem in power generation through renewable energies is the dependence on fluctuations in its availability. If the charging management of the electric vehicles is coordinated with the energy management of the house, this disadvantage can be counteracted. With appropriate home tank, a 7 kWp solar system can load the electric vehicle to 80% with its own solar power (starting from an average power consumption of 2.500 kWh). This saves up to 50% of charging costs compared to the household stream.

Furthermore, the insight into vehicle data is advantageous to increase the self-consumption rate of the PV system. Specifically, this is about the current boost. If the car has a charging management that has access to this data, a buffer for the expected solar yield can be kept free. If this possibility is to be exploited optimally, it needs exact forecasts. Exact feed-in forecasts not only ensure some security against the volatility of renewable energies, but also enable higher cost savings.

It is therefore important to include forecasts so that the efficiency and cost-effectiveness of the PV system is maximized. Also in consideration of subsidized plants, forecasting loading is of great importance, as some EEG support programs require a limitation of the maximum PV feed-in power at the network connection point. This means that when PV systems produce too much energy, they need to be sealed. Solar current is then produced, in the truest sense of the word, in vain. In addition, especially on sunny days, a lot of PV energy is available, which causes the battery to be fully charged. Since the PV feed is limited at an early stage, the memory can no longer record the excess energy.

In order for electromobility to be a solution in the future, the electric car must be integrated more comprehensively into the energy management of buildings. It requires intelligent charging management systems that control charging processes so that as much renewable energies and favorable electricity can be used. In addition, data-based systems can make the charging even more efficient and more sustainable.

The Flensburg startup IO Dynamics developed with the IO-ELON software a vehicle data-based loading and fleet management that applies to companies forecast-based PV loading and thus significantly increases the solar-owned consumption of electrical fleets.

About the author: IO-Dynamics is a lot to inform about the potential of electromobility and new technologies in the charging management. Marie Colditz takes care of the communication at IO-Dynamics and makes it understandable about these topics. It can be reached under Marie.Colditz @

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3 thoughts on “Forecasting loading: Use clean and cheap solar power optimally”

  1. There is even more than described in the article. I pass my car (Tesla M3 and Ca. 15 000 km driving power P.a.) And my complete household with electricity from the 10 kWp PV system. In February, I came to a self-sufficiency cycle of 75% and in January to 35%, from April to September to almost 100% and expired to 80%. My annual consumption is (incl. E-car) at 6700 kWh. The PV system supplies to the 10.000 kWh p.a.
    That really pays off.

  2. There are already wallboxes that start the charging process when a lot of eco flow is on the net?

    If the sun is seeming or the wind blowing is the storage of the surplus the challenge, inB since (private) PV operators usually have no memory and get their surplus remunerated even if this is not needed.

  3. That does not reach far enough. Also be BEV, as Ottos also, make a lot of unnecessary and generate this amount loss. Sono with the Sion have recognized this. The Sion has a bidirectional charger. This allows the vehicle battery to be used as a house memory. So to speak the Power Bank on 4 wheels and the energy of his built-in 4m2 PV system he has, can also be consumed in the house. I’m waiting with the next car purchase until he is buying.


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