Design of an Autonomous Solar Charging Station for E-Bikes
article
An autonomous solar charging station for e-Bikes has been developed. For an optimal design of all system components, both a prototype has been built, and a model has been created. Validation of the model has been done by taking measured irradiance and measured total electrical load profiles as input for a period of one month. The output in terms of PV yield, grid feed-in, SOC of battery bank, etc. has been compared with the real measured values of these parameters. This validation gives much confidence in the model, although care needs to be taken for low SOC values, at which a high accuracy of the model is mandatory to distinguish between ‘able to power’ and ‘unmet load’. Full year round modeling results are performed by using TMY-data for irradiance, and an electrical load very nearby real measured load patterns including some seasonal effects. These simulation runs show a reliability of 94.9% for the current configuration with 7 e-Bikes and a well-equipped charging station. The system was found to have a relatively high degree of reliability (>90%) even when the system was used with twice the number of bikes it was designed for. Turning the heavy consuming advertisement screen completely off, a perfect reliability of 100% is found. This demonstrates that the
designed system is quite flexible with the number of e-Bikes it can cater to and is far more sensitive to full-time auxiliary loads in the charging station.
designed system is quite flexible with the number of e-Bikes it can cater to and is far more sensitive to full-time auxiliary loads in the charging station.
TNO Identifier
873166
Collation
5 p.
Pages
2105-2109