RV50 power modes and alarms

My understanding of the 3 power modes for the Raven RV50 :
ON – the CPU and the radio are on. The current draw is 900 mW (75 mA @ 12 VDC) when the gateway is idle (i.e. no traffic is being sent or received)
STANDBY – the CPU and radio are off, but can be enabled by an I/O input or at a configured time. Current draw is 53 mW (4.4 mA @ 12 VDC)
OFF – all power is switched off. Ignition is low, but Vin remains connected. Current draw is 11 mW (0.9 mA @ 12 VDC)

We are currently powering the RV50 ON and OFF to conserve power for a solar powered remote telemetry application. However, during an Alarm condition, it takes a couple minutes to power ON the RV50 so it’s ready for TCP connection. If we were to use the STANDBY mode, how long would it take to be ready to upload data?