Got a call from Phantom last evening to inform us that there was a "power down" on the caravan battery,in other words it was flat.
Strange as it had not occurred before.
Visited storage this morning to swap the battery over to discover we had left the master switch on and the light on the voltmeter had flattened the battery.
Lesson learned,check the master switch before locking up.
At least Phantom were on the ball.