Hi, been hunting for something suitable and not having much luck.

Our property is fully fenced with a very tall and solid gate. Great for keeping children in and unwanted visitors out. However this has created a problem when we have a visitor that we may not necessarily be aware they are wanting to get in!

Currently we use a wireless weatherproof gate bell which is battery powered but the battery seems to go flat fairly quickly.

The ideal for me is a solar powered option, if anyone is aware of something along those lines?

Would need at least a 30 meter range.