Corporate Expense Reduction: Energy

One of the things we’ve done with our home automation is tracking energy usage – partially because we want to size out a solar installation and the net metering in Ohio is awesome unless you produce more electricity in a rolling 12 month period than you use. So the installation has to be really close to your actual usage. But also because electricity costs money. Similar approaches may be beneficial to corporations. I’m using our 11 cent per kWh rate as an example. Actual rates depend on location and usage.

Does a company want to devote resources to “office automation” like we have home automation? Coupling motion detectors with smart outlets {or even just office schedules – if the last person is off shift at 7PM, dropping some device power at 8 should have no impact} to turn off power might save a lot in standby draw.

Even without home automation, companies can gather usage data to allow resources to be devoted to their biggest energy draws. The first step is identifying the big draws. We use Aeon Labs zwave clamp on home energy meters, but there are stand-alone energy meters. I’ve seen DIY Arduino based ones (, or high end Fluke devices with clamps do the same thing (@5k+ for the Fluke … that’s a bit of an investment, but if someone’s got an energy metering capable fluke for other work ‘stuff’ … they may just need the 10$ clamps). Whatever equipment – clamp it on one circuit in a panel for a few days. Get a number, move it to the next circuit. Eventually you’ve got daily usage numbers for different circuits and just need to look at what is on those circuits to narrow down potential saving points.

We found obvious stuff – HVAC uses a lot of power. If a company leases a building with outdated equipment, use firm numbers in lease negotiation. The HVAC draws x kWh per year which costs us y $. A middle-road new system should draw z kWh which means we’re spending some concrete dollar figure per year because this system is so old. The same information can be used to cost-justify upgrades/replacements for company-owned buildings. Measure usage on lighting circuits. An office with old ballasts and florescent bulbs – what they are costing to run tells you if switching to LED {and there *are* LED T4/8 tubes that don’t require fixture replacements} makes any sense.

But we also found things I would never have even considered if I made a list of all of our non-trivial electrical draws. 20% of our annual electrical usage is the septic aerator (it literally uses more energy than the geothermal HVAC system in a year). We can get it down to 11% of our projected usage by cycling the thing on during even hours and off during odd (or on/off in twelve hour chunks, or 4 on / 4 off / 4 on / 4 off / 4 on / 4 off … new aerators have scheduling and do this themselves). Now that septic aerator savings is only like 250$ a year. Not a huge amount of money, but it’s 250$ I would never have realized we were spending otherwise.

From an IT perspective – if a server supports wake-on-lan … does a backup server and tape library need to be running 24×7? If someone kicks off a restore, can it be powered up (adds a minute, but saves power whenever restores aren’t running) and can it be programmatically powered on maybe half an hour before its backup jobs are scheduled to kick. Then power back down when no jobs report as running or scheduled for x hours. As a company, we mandate that all computers be left powered on so patches can be deployed overnight. What if the nightly patch check-in then powered the computer down (either because there are no patches or after installation in lieu of a reboot)?

Or a printer — there is no need for the printer to be in standby mode for the 15 hours a day no one is around to print. Or the weekends when no one is around. Or company holidays. One of the fairly large Xerox printers we have draws a continuous 11 Watts in sleep mode uses 71 kWh each year between 17:30 and 07:30 M-F and all day Saturday and Sunday. Maybe 72 kWh if you add company holidays. That’s not quite eight dollars a year in savings (and power consumption won’t be 0 if the device can be woken remotely) – but saving 6$ per printer in a company with 2000 printers is 12,000$ each year. Some of the older printers don’t even have a lower power sleep mode and draw 95 Watts in standby mode – 620 Watts per year when no one is around, and just under 70$ in electricity. Even better – HP offers an auto-off / auto-on on activity feature that allows energy to be saved during working hours.

Are there intangible benefits to energy saving initiatives? Get into the automation side of energy savings, would some tech magazine profiling the effort (free publicity, and tech magazines are a good place to advertise a company offering network services)? Can companies form partnerships with geothermal / solar / wind / whatever manufacturers to get cheap installations + publicity? Sadly, in some markets that may not play well (what, you don’t want to burn coal!?!) … but it might not be seen as a negative if it approached as a “save money, do right by stockholders AND customers” message instead of a “green, save the planet, global warming is bad” message.

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