Solar API Integration

You should try my device type for the Envoy - it talks to your envoy on the local LAN which removes the need for a developer account and all rate limits and such):

Note that I have only tried this with the “old-style” Envoy - if you have an Envoy-S some tweaks might be needed (though I would gladly help you out to extend the device type to support those as well in case the API is different).