Looks like there were some internet drop outs a few days earlier but at that time it just stopped.
8/03/19 00:10:05 WiFi disconnected.
8/03/19 00:10:06 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=9, RSSI -82db
8/03/19 00:10:15 WiFi disconnected.
8/03/19 00:10:19 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=1, RSSI -82db
8/07/19 12:40:00 PVoutput: Fatal response
8/07/19 12:40:00 PVoutput: Stopped.
8/09/19 11:32:57 WiFi disconnected.
8/09/19 11:32:58 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=1, RSSI -80db
8/10/19 01:00:11 WiFi disconnected.
8/10/19 01:00:15 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=11, RSSI -81db
8/12/19 21:08:58 WiFi disconnected.
8/12/19 21:11:42 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=11, RSSI -78db
8/12/19 21:11:52 WiFi disconnected.
8/12/19 21:11:55 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=1, RSSI -78db
8/12/19 21:14:37 WiFi disconnected.
8/12/19 21:14:52 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=1, RSSI -79db
8/13/19 21:03:57 timeSync: Six week routine restart.
** Restart **
SD initialized.
8/13/19 11:03:59z Real Time Clock is running. Unix time 1565694239
8/13/19 11:03:59z Reset reason: Software/System restart
8/13/19 11:03:59z Trace: 1:3, 1:4, 1:3, 1:4, 1:3, 1:4, 1:3, 1:4, 1:3, 1:4, 1:3, 1:4, 1:3, 1:4, 1:1[2], 1:2[3], 9:0[3], 9:0, 9:1, 8:4, 8:6, 8:8, 8:9, 9:3, 9:5, 9:9, 1:2, 1:3, 1:4, 1:5[20], 20:0, 20:1
8/13/19 11:03:59z ESP8266 ChipID: 2991982
8/13/19 11:03:59z IoTaWatt 4.x, Firmware version 02_04_00
8/13/19 11:03:59z SPIFFS mounted.
8/13/19 21:04:01 Local time zone: +10:00
8/13/19 21:04:01 Using Daylight Saving Time (BST) when in effect.
8/13/19 21:04:01 device name: IotaWatt
8/13/19 21:04:01 MDNS responder started for hostname IotaWatt
8/13/19 21:04:01 LLMNR responder started for hostname IotaWatt
8/13/19 21:04:02 HTTP server started
8/13/19 21:04:02 timeSync: service started.
8/13/19 21:04:02 statService: started.
8/13/19 21:04:02 dataLog: service started.
8/13/19 21:04:06 dataLog: Last log entry 08/13/19 21:03:55
8/13/19 21:04:06 historyLog: service started.
8/13/19 21:04:07 historyLog: Last log entry 08/13/19 21:03:00
8/13/19 21:04:12 PVoutput: started
8/13/19 22:04:03 WiFi disconnected more than 60 minutes, restarting.
** Restart **
SD initialized.
8/13/19 12:04:04z Real Time Clock is running. Unix time 1565697844
8/13/19 12:04:04z Reset reason: Software/System restart
8/13/19 12:04:04z Trace: 20:1, 20:2, 20:3, 20:4, 20:42, 1:6, 1:1[4], 1:2[5], 9:0[5], 9:0, 9:1, 8:4, 8:6, 8:8, 8:9, 9:3, 9:5, 9:9, 1:2, 1:3, 1:4, 1:5[20], 20:0, 20:1, 20:2, 20:3, 20:4, 20:42, 1:6, 1:3, 1:4, 1:5[21]
8/13/19 12:04:04z ESP8266 ChipID: 2991982
8/13/19 12:04:04z IoTaWatt 4.x, Firmware version 02_04_00
8/13/19 12:04:04z SPIFFS mounted.
8/13/19 22:04:06 Local time zone: +10:00
8/13/19 22:04:06 Using Daylight Saving Time (BST) when in effect.
8/13/19 22:04:06 device name: IotaWatt
8/13/19 22:04:06 MDNS responder started for hostname IotaWatt
8/13/19 22:04:06 LLMNR responder started for hostname IotaWatt
8/13/19 22:04:07 HTTP server started
8/13/19 22:04:07 WiFi connected. SSID=Telstra82C2AA, IP=10.0.0.173, channel=1, RSSI -77db
8/13/19 22:04:07 timeSync: service started.
8/13/19 22:04:07 statService: started.
8/13/19 22:04:08 Updater: service started. Auto-update class is MINOR
8/13/19 22:04:08 dataLog: service started.
8/13/19 22:04:12 dataLog: Last log entry 08/13/19 22:04:00
8/13/19 22:04:12 historyLog: service started.
8/13/19 22:04:14 historyLog: Last log entry 08/13/19 22:04:00
8/13/19 22:04:15 Updater: Auto-update is current for class MINOR.
8/13/19 22:04:17 PVoutput: started
8/13/19 22:04:17 PVoutput: System King Creek 1, interval 5, freeload mode
8/13/19 22:04:18 PVoutput: Start status beginning 08/07/19 12:35:00
8/13/19 22:04:20 PVoutput: Fatal response
8/13/19 22:04:21 PVoutput: Stopped.
8/14/19 12:45:00 historyLog: primary log file read failure. Service suspended.
8/15/19 09:05:36 Restart command received.