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Does a motor mover really flatten the battery.

GUMPY

GUMPY

Just done a 5 minute move to get the van out of storage for its service it used 3% of battery capacity and drew a maximum of 50amps when first started.
Much less than I had been led to believe 🫣1000005722.png
 
You’ve confirmed what Prof John/RogerL has been saying for years, is that movers don’t use much battery capacity for most times of use. Of course there will be exceptions for some owners depending on their particular needs.
 
We had our caravan in storage for 3 months when we moved house. I was concerned the battery would be flat and the motor mover wouldn't work. When we went to get it the battery showed 30% and the mover worked fine.
 
Motor manufactures have to quote maximum current consumptions, so appliance designers can be sure to specify suitable motors for their products. The difficulty for electric motors is the maximum current a DC motor will draw is when it's stalled, or starting from stationary with no back EMF being generated. Most designers will ensure the motors torque will be able to driver the appliance, so it instant the motors shaft does start to turn, the back EMF ramps up and opposes the inrush current which diminishes as the shaft speed increases.

The reason most people need a reasonable sized leisure battery, is to ensure the battery has enough cold cranking amps to start a caravan mover where the wheels may need to climb a kerb. In general even a small car starter battery will have enough cold cranking amps for any mover, but the construction batteries is different and leisure batteries can stad being discharged for longer than conventional car batteries.
 
Our caravan sits on the drive by the side of the house, the drive slopes down once level with the front edge of the house - getting it off the drive is no problem and so far it’s managed the kerb and incline back up the drive without issue.
It weighs circa 1460 kgs and I have actually managed to push it up the drive on my own once ( as soon as you get it rolling it’s manageable), but it’s not something I would want to do regularly.

Just off now for my three shredded wheat🤣🤣🤣

Captain Chaos
 
Steve1962 said:
Our caravan sits on the drive by the side of the house, the drive slopes down once level with the front edge of the house - getting it off the drive is no problem and so far it’s managed the kerb and incline back up the drive without issue.
It weighs circa 1460 kgs and I have actually managed to push it up the drive on my own once ( as soon as you get it rolling it’s manageable), but it’s not something I would want to do regularly.

Just off now for my three shredded wheat🤣🤣🤣

Captain Chaos
Click to expand...
Nor is it something I would recommend! A 1.5 tonne caravan on a slope can do serious damage to humans and property.
 
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