Do I need a solar controller?

[M and S LC 2]

I've recently purchased a small 10 watt solar panel .
The box says I can connect directly to my leisure battery to enable trickle charging whilst the van is in storage ( no mains available).
But do I need a controller?
I've searched online but seem to be getting conflicting information.
Any information would be appreciated

 

[Richard n Ann]

You're supposed to be ok up to about 15w but my 5w panel on the car sends the voltage up to 15+ on consecutive sunny days. And that's with the panel in the windscreen which significantly reduces output.

Fit a little £20 Bluetooth monitor and keep an eye on it. The thing with small panels + controller is if you're not careful the controller can use more power than the panel makes.

Amazon product ASIN B08F9ZN5XW

 

[M and S LC 2]

Thanks. I will check it out but ,to be honest, I'm thinking of ditching the 10watt( thought it was a good idea at the time!) and buying a foldable 80watt with controller.