Solar powered raspberry pi that can turn on/off the boat's inverter remotely.
- http://www.maplin.co.uk/p/yuasa-6v-sealed-lead-acid-battery-12ah-1-pack-yj67x
- http://www.maplin.co.uk/p/solar-charging-regulator-n82au
- http://www.maplin.co.uk/p/4w-solar-briefcase-n05hn
- http://www.maplin.co.uk/p/12-24v-micro-dc-to-1a-usb-adapter-a50jk
- http://www.amazon.co.uk/2-Channel-Module-Shield-Arduino-Electronic/dp/B009P04ZKC/ref=sr_1_3?ie=UTF8&qid=1410527182&sr=8-3&keywords=relay+board
Might have some relays in my box at the Hackspace.