I have an Ecoflow battery to be used in a Volkswagen Caddy and which I'd like to keep connected to the Caddy's 12V accessory port (unless the car is OFF for more 1 or 2 hours). The Caddy has the 12V accessory ports always live. The Caddy manual gives the following warning regarding 12V accessories:
To avoid damage from voltage fluctuations, switch off connected electrical equipment before switching the ignition on or off and before starting the engine.
This means I'd have to (remember to) constantly plug and unplug the Ecoflow battery, which would be a tremendous hassle.
What's the reason for the warning in the Volkswagen manual and does it really need to be followed?