Simple Notify Alert Not Working

Hoping for some assistance with what should be a simple alert. I have a sensor created in my config yaml file (see below) that creates an output with a measurement of units being watts. I’m attempting to create a simple automation that sends me an alert when the watts drops below a set number - say 500. I’m including the automation below. For some reason I can’t get the automation to trigger. The notification works fine. Is the sensor not “numeric_state”?

Config Sensor info:

sensor:
  - platform: rest
    scan_interval: 10
    resource: http://192.168.1.186/cgi-bin/status.xml
    name: "Apex EB832_3"
    value_template: >
      {{ (value_json.status.probes.probe[29].value | int) +
      (value_json.status.probes.probe[30].value | int) +
      (value_json.status.probes.probe[31].value | int) +
      (value_json.status.probes.probe[32].value | int) +
      (value_json.status.probes.probe[33].value | int) +
      (value_json.status.probes.probe[34].value | int) +
      (value_json.status.probes.probe[35].value | int) +
      (value_json.status.probes.probe[36].value | int) }}
    unit_of_measurement: "W"
    force_update: true

Automation:

alias: Notify Apex Low Wattage Energy Bar 832_3
description: ""
trigger:
  - platform: homeassistant
    event: start
  - platform: numeric_state
    entity_id: sensor.apex_eb832_3
    below: 500
condition:
  - condition: numeric_state
    entity_id: sensor.apex_eb832_3
    below: 500
action:
  - service: notify.gmail
    data:
      message: Apex Energy Bar Low Wattage Alert - Check Apex
      title: HA Apex Alert Energy Bar 832_3
  - service: notify.pushbullet_notify
    data:
      message: Apex Energy Bar Low Wattage Alert - Check Apex
      title: HA Apex Alert Energy Bar 832_3
mode: single