I’m a sustainable energy engineer at work and at home. I’m using an emonTX Arduino shield on a Yun which reports directly to a server, which in my case is a GnuBee, a NAS with open source hardware. The GnuBee also runs a music server (that outputs digital to an external DAC connected to a stereo and tower speakers), calendar and contacts backup/sync, and file sync/backup.

The emonTX’s 4 CTs monitor a pair of heat pumps and a pair of heat pump water heaters that serve the four apartments in my house. I’m thinking of duplicating my emonTx+Yun to monitor a new washing machine and heat pump dryer along with the resistance heat in the tiny new laundry room that was carved out of a bathroom. The room is a square less than 2 m on a side and it has a new south facing glass door so I’m hoping it’s mostly passive solar heated.

I have another Arduino monitoring project: a remote monitor for my boat. It’s a sailboat on which I removed a gas inboard engine and replaced it with an electric motor and added a solar bimini for charging. In the past I’ve returned to the boat to find the batteries so low they were damaged beyond repair, or water in the cabin. So this Arduino’s job is to let me know if either situation starts to happen. I also want to do something with excess solar power, but I may be able to do that directly on the charge controller.