> The high cost of EV (electric vehicle) chargers may lead you to believe that they’re complex systems. [...] They’re actually quite simple — basically just glo

> The high cost of EV (electric vehicle) chargers may lead you to believe that they’re complex systems. [...] They’re actually quite simple — basically just glorified switches [...] It really isn’t any more complex than a $15 smart outlet Yeah, this alternative is really low cost, except the £80 RCBO [1] he uses for the DC current leakage detection. Something an EVSE does need to provide. Oh, and also a full-featured EVSE will generally: * Supply more than the 10A this provides, which you could get with a granny charger * Monitor the current being drawn, cut power if the car draws more than negotiated, or more than the cables/relays are rated for. * Have a reverse protection diode on the relays * Use two double-pole relays controlled independently, so one always breaks the load (putting it at risk of damage) while the other never does (so when the first one fails, the backup is fresh and ready). * Detect stuck relay contacts * Sense temperatures on the board, at the main connectors, and monitor the release switch on the cable (if present) * Manage relay coil power dissipation (a bigger problem with bigger relays, if your EVSE does more than 10A) * More waterproofing - for example, conformal coating on the PCBs * Don't put cable glands on the top face of the box, where water can pool up against the seal * Don't involve a video showing someone poking wires into live electrical sockets, connected to bare circuit boards they hold in their hands. Something tells me the person who watched this video has never read the specifications of a real EVSE, or watched a teardown by mikeselectricstuff or EEVblog... [1] https://ecoharmony.co.uk/collections/6ma/products/bituo-technik-rcbo-rcd-pd-type-a-rccb-type-c-mcb-30ma-pulsating-dc-sensitive-6ma-dc-rcm https://ecoharmony.co.uk/collections/6ma/products/bituo-tech...