Solar panel and pond pump

[pirate]

This is another solution, for sprinklers on a golf course, so relevant to a pump for a pond.
What happens is the screwnuts and that black cylinder get wet when it rains, causing a short and stopping the sprinkler from firing up. Later, when everything dries up, it is obvious that the greens need water, so the sprinkler turns on. Simple.

The gate valve is supported by a custom moulded concrete block, and the solenoid is cleverly balanced on a strategically placed, erm...bit of concrete...which is wedge shaped, to allow easy regulation of height.

 

[pirate]

I should point out these are everywhere on the course...the only downside is that the cables often get pecked by the peacocks...

 

[bigspark17]

If it’s a big enough battery it doesn’t need to be charging whilst running the pump. The change over switch will just switch the pump on whilst taking the battery off charge

Still dont see what your gaining. Why would you stop it charging if say pump run time was during the day. Seems a very unnecessary idea!