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Yeah, a mate did a summer internship with them back when they were EcoInnovation. Some interesting stories. Like the time they plumbed a school in Stratford or Inglewood for solar hot water. They...

I've got the guts of a smart drive if you want to have a crack at making a hydro setup. But yeah, solar probably simpler for keeping a rarely used battery bank charged.

Sent from my SM-T800 using...

These guys: http://shop.powerspout.com

Based in Taranaki somewhere. Off the shelf options seem a bit pricey, but I guess you're trading $ instead of the time spent to do all the research...