The Wevo back office platform integrates with SolarEdge’s inverters and meters to get a real-time view of solar production and grid consumption. Combining this with EV charging data creates a holistic site view.
Pure solar charging
Once the SolarEdge inverter and meter are connected, the Wevo Energy system can be configured to charge purely from the sun. When this mode is active, charging only happens when excess solar production is exported to the grid.
Pure solar charging is great for sites with lots of energy exports. It can save a lot of money if the import and export rates differ.
For example, assume that the utility pays 10c/kWh for grid export and charges 40c/kWh for grid imports. Let’s explore two scenarios at a typical workplace:
Without solar charging | With solar EV charging |
08:00 am – Employees arrive at work and plug their cars. Since solar production is still low, cars will charge using grid power (at 40c/kWh). 10:00 am – Solar production is still low. However, most vehicles are full and do not need any more charge. 02:00 pm – The sun is now high in the sky, and solar production is at its peak. All solar power is exported to the grid (at 10c/kWh) since no cars require any charge. Average cost per kWh charged: 30c | 08:00 am – Employees arrive at work and plug their cars. The system places the cars on pause. 10:00 am – Solar production is starting to ramp. The system optimizes vehicle charging to self-consumption. 02:00 pm – The sun is now high in the sky, and solar production is at its peak. All vehicles are now charging using solar power. Vehicles will be full by 3:00 pm and ready for employees starting to leave work. Average cost per kWh charged: 10c |
Solar charging saved 66% of the costs in the example above.
To learn more about Solar EV charging, visit our blog. To enable Solar charging in your site please contact us.