template: fronius_last_collected_secs
families: *
      on: fronius.power
    calc: $now - $last_collected_t
   every: 10s
   units: seconds ago
    warn: $this > (($status >= $WARNING)  ? ($update_every) : ( 5 * $update_every))
    crit: $this > (($status == $CRITICAL) ? ($update_every) : (60 * $update_every))
   delay: down 5m multiplier 1.5 max 1h
    info: number of seconds since the last successful data collection
      to: sitemgr