I am thinking about using a pressure washer to let me work at a reasonable height.
One of the applications is to clean my solar panels, which are now quite "lichened" after a few years - partly because some are modestly tree-compromised. This will require me to work from a flat roof over the garage, where the roof plane begins.
The top of the array of panels is about 5.5m vertically high above the garage roof.
I have a reasonably high end Nilfisk Excellent E160.1 model, which has a 10m hose so may well be suitable even sitting on the ground to avoid taking weight up even a short ladder to the flat roof, and can be fed either from a hose, or a barrel (ie wheelie bin) of water.
An alternative is to look at a portable item. I am a Makita setup, and they have a good portable item which costs £400 (!) without batteries. The alternative portable would be something cheap and cheerful.
I'm after experience as to what other people have done.
Thanks for any comment.
Ferdinand