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This is a very exciting project. I would like to suggest an enhancement that could use some of the key components for dual purposes. I’ve been studying low-cost photobioreactors (PBRs) that can grow microalgae at scale. IBCs (Industrial Bulk Containers) are convenient vessels, but the light path for photosynthesis is not good in high volume-to-surface area systems. Flat panel & tubular types are preferred, but these are costly. Fresnel lenses are one solution. Pumps for water circulation is another essential requirement, and of course a source of remote electrical power.
So, when irrigation is not needed on a regular basis, significant components of the solar powered irrigation system could be switched over to PBR support. This synergistic sharing of resources could provide a CAPEX reduction. Microalgae can also be used as a bio-stimulant to enhance crops yields and provide other revenue streams.
Please do get in touch if you are working on this project and you would like to discuss further. Thanks, Matthew Shearn.