SunHarvest

EV chargers

Linking a charger lets rules react to the car. The usual goal is to stop the Powerwall emptying itself into an EV while it charges.

What linking a charger gives you

Control › Rules always lists two EV signals, EV charging (charging or not charging) and EV charge power (kW); they read your charger once one is linked. The rule most people want has two rows:

  • When EV charging changes to charging, then set backup reserve 100%.
  • When EV charging changes to not charging, then set backup reserve back to your usual figure.

The Powerwall then stops draining into the car and goes back to normal when the car is done. AI mode sees the same reading and plans around it.

SunHarvest only ever reads the charger, about once a minute. It never starts, stops or adjusts a charge; that stays with the charger's own app. A Tesla Wall Connector paired to your Powerwall needs no linking at all: the Powerwall already reports it, and the signals read it automatically.

Set chargers up in Settings › Site › EV charger.

myenergi Zappi

  1. In the myenergi app, go to Account › Advanced › API key. Generate a key and copy it. You also need the hub serial number, which is on the hub and under Account › Devices.
  2. In SunHarvest, pick myenergi Zappi, paste the serial and the key, and press Connect.
  3. If the hub has more than one Zappi, you are asked which one.

The key can be regenerated in the myenergi app at any time. If you do, connect again here.

Easee

Pick Easee, enter the email or phone number and password of your Easee account, and press Connect. Easee swaps the sign-in for a token that renews itself, so the password itself is not stored. If Easee later refuses the token, for example because you changed the password, the card says so and you connect again.

Zaptec

Pick Zaptec, enter the email and password of your Zaptec Portal account, and press Connect. Zaptec's tokens expire and cannot be renewed without the sign-in, so the sign-in is kept, encrypted, and used only to read the charger.

The charger card, and when it goes wrong

The card shows the state in the charger's own words ("Charging at 7.2 kW", "Car plugged in, waiting"), when it was last checked, and how long the current charge has been running. Check now reads it straight away. Disconnect removes the stored sign-in.

If the vendor's service is down, the card shows its message and SunHarvest tries again with growing pauses, up to half an hour apart. If the vendor no longer accepts the stored sign-in, the card says to connect again and stops trying until you do.

Other chargers

Other makes (Hypervolt, Ohme, Pod Point, Wallbox, Andersen and so on) are not linked yet. Until they are, a rough stand-in is a rule on Home power rises above 6 kW sustained 10 min, with the reverse rule to undo it. A 7 kW charger is a distinctive step, though an electric shower will trip it now and then.