Zwolle is the capital of the Dutch province of Overijssel. And as in so many densely populated city centres, there is not much space in Zwolle for e-charging infrastructure and the ever-larger cars. Nevertheless, municipalities are obliged to provide charging stations. When a suitable area was available directly in front of its own office, the project developer Prowind took the opportunity to realise a charging park in combination with a PV system with zero feed-in and imbalance trading – and to break new ground in the process.
The power grid in the Netherlands is reaching its capacity limits almost everywhere. The grid con-nection of the Prowind site in the city centre of Zwolle is also limited to 176 kW – too little to oper-ate a charging park with a total of 22 charging points efficiently and economically.
To leverage this potential nevertheless, Prowind installed a lightweight, modular canopy from the greenhouse construction above the parking lots – mounted on it: 680 photovoltaic modules with a peak output of 306 kWp. In good sunlight, the system reliably supplies electricity for on-site charg-ing – and at the same time provides shade for vehicles during the charging process.
But how can vehicles that are connected overnight be charged? And how can we take advantage of the periods of negative electricity prices, which are not uncommon in the Netherlands?
The answer lies in the intelligent interplay of PV generation,battery storage and EV charging: A modern battery storage system compensates for peak loads, shifts battery charging processes to economically advantageous time windows and enables the sale of surplus energy – for example to the adjacent office space, whose electricity demand is particularly high during the day.
The storage system thus takes on much more than a supporting role – it becomes the heart of the entire business model. It is only through this that the charging park can be operated economically despite limited grid connection capacity.
After Prowind came across the large German charging park in Hilden during research, the choice fell on the German provider TESVOLT. Prowind then installed the TS HV 80 E-storage system in its own operating room at street level. With an output of 150 kW and a capacity of 480 kWh, the sys-tem ensures intelligent load management, secures the grid connection and enables economical charging as well as electricity marketing and Made in Germany.
Thanks to the intelligent energy management system, the storage system is charged in a targeted manner when electricity prices are low. At peak times, the battery supplements the grid connec-tion and provides energy for the charging stations. In winter, predictive recharging based on weather data ensures that no load peaks occur during the day. Other advantages:
Maximum cost-effectiveness
With 100% depth of discharge, the system guarantees to get the most out of the capacity provided.
10-year system + 10-year capacity guarantee ensure long-term investment security
Uncompromisingly powerful
1C power for fast loading and unloading
Scalable: up to 4 systems per inverter
Optimized for long-term industrial use and heavy duty
Higher energy density allows use of smallest possible energy storage room
Highest security
TÜV-certified system
Samsung SDI cells with individual monitoring
PGS 37-1 compliant
"The battery works perfectly in our system – especially in combination with the EMS. Thanks to TESVOLT, we can make optimal use of the flexibility of our energy."
– Prowind BV
"The Solar Transferium is a smart answer to the question of how we can reduce the enormous load on the electricity grid."
– Tijs de Bree, Deputy Province of Overijssel
by Cicero Design
German
