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Communication with a smart home system is definitely not required. The smart home system should control the charger not the car. The bsoc of the Twike is not relevant for how much you need to charge over night. It is the next day planned usage that determines de amount that needs to be charged overnight. That overnight charge amount will be user input in your domatica system. Bidirectional charging with your Twike is an expensive solution. A home battery is 4 cent per kWh. The price per kWh on the Twike will be 10 times more expensive.
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We agree that the smart-home system should remain responsible for the overall energy management. However, we would not treat the TWIKE battery like a separately purchased home battery.
The traction battery is primarily purchased for vehicle range and is already available whenever the vehicle is parked and connected. For its use as an additional home-storage resource, the relevant economics are therefore mainly the incremental effort for integration, control and communication rather than the full battery cost.
If bidirectional charging can be implemented without causing disproportionate additional battery ageing, it can make sense to use part of the available capacity alongside a stationary home battery. Especially considering calendar ageing, useful additional use of an existing traction battery can be more efficient than leaving most of its capacity unused while the vehicle is parked.
For us, the key question is therefore not “TWIKE battery versus home battery”, but how both can be integrated intelligently and used where each makes the most sense.
— TWIKE Team
