Cribbj
Our plug supports up to a 15A resistive load. Since your water heater is a resistive load and consumes 1200W, it should be within the supported range.
Please make sure the water heater plug, the smart plug, and the wall outlet are all firmly connected. A loose connection may cause extra heat while the water heater is running.
If you are looking for a platform that can manage most smart devices, Home Assistant would be a good option. You will also need a Zigbee dongle to use Zigbee devices with Home Assistant.
Echo Dots do not have a built-in Zigbee hub, and Alexa does not support the energy monitoring function for this device. Alexa would only provide basic on/off control, so it may not be the best option for your use case.
When setting up Home Assistant, ChatGPT can also be a helpful resource. :)
Please let us know if you have any further questions. We will be glad to help.