On 26/08/2019 14:51, T i m wrote:

[1] Someone was asking me about the idea of a solar powered, battery
stored, portable waterpump for allotment use. The water is delivered
to IBC tanks via some plumbing (and water butts from the rain etc) but
needs to be delivered to the plants manually. I suggested that maybe a
leisure battery and suitable low power pump (possibly submersible)
could do the job but like you, suggested the panels might be on top of
a 'docking shed' or some such?

I have done this particular thing using a submersible solar powered pump
that was intended to run a fountain with about 3m head of water
pressure. It was programmed to run two slots of half an hour a day
morning and evening to run hoselock drop lines in my greenhouse.

The original came from bankrupt stock as the solar powered fountain was
distinctly unimpressive. Nothing wrong with the pump though when
connected to a decent supply it packed quite a punch.

Only complication was it needed a stocking fine filter on the inlet
otherwise mosquito larvae would jam the jets on the drip lines. Solar
power wasn't a design win for it though - it was much easier to lug a
charged 12Ah SLA battery up to the greenhouse and swap it as needed.

--
Regards,
Martin Brown