> Usually a system just needs to support a handful of use cases, like integrating with different payment providers. Building EV chargers is a good dose of elec

> Usually a system just needs to support a handful of use cases, like integrating with different payment providers. Building EV chargers is a good dose of electrical engineering combined with talking to dozens of car models and their own particular quirky interpretations of common protocols, which is like designing websites for a market with dozens of unique browser implementations. In spite of that, it seems half of the complexity is making sure people pay.