REST API command/platform fails on POST to external URL (solcast)

[wills106 (Will)]

I am using a SolaX Inverter and the a 4.5kWh Triple Power Battery.
I want to add a second battery hopefully at the end of the month.

I created the following to control the Battery and Read the Inverter states.

Universal Solar Inverter over Modbus RS485 / TCP custom_component (Growatt, Sofar, SolaX, Solis)

I have finally got full battery control working! I can now prevent and alter the current that the battery charges and discharges at. I can also alter the min discharge percentage. (Please do not alter the min value on the slider to below 10!) I wanted to be able to charge my car from Solar without draining my house battery as the inverter would push that electricity out as a priority. Now prior to charging I can alter the discharge Amps slider to zero and charge my car preserving the electric…