Category Archives: Uncategorized

Flexible loads available in the NEM

The 2004 report http://www.energyrating.gov.au/library/pubs/200412-mepspools.pdf identifies that in Australia swimming pools and spas account for 3.3% of residential sector electricity. Pool pumps make a great “flexible” load; they are used for long periods of time even at times when it is … Continue reading

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Energy tip: Non-TOU metering and Solar Hot Water

Traditional metering (non time-of-use) often involves two meters. Non-TOU meters bill at a stepped rate: 19.09c/kWh for the first chunk of 1750kWh per 91 days; 28.05c/kWh thereafter The second meter bills the “Offpeak” circuit. This circuit is controlled by the … Continue reading

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ESCOs, iGrid, and the Regulator.

The “intelligent Grid” is more likely an evolutionary process rather than a centrally designed, administered, and controlled collection of technologies that “runs energy”. I think it will be driven by ESCOS, starting in the industrial and commercial area (it has … Continue reading

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Why Utilities like Zigbee

The amount of money made by privately owned Australian electricity distributors is directly proportional to their capital. They like Zigbee because Zigbee is a capital expense; other forms of communication involve either involve recurring costs or – horror – letting … Continue reading

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WattWatchers product status

Yesterday we received off-tool parts for WattWatchers Auditor and Appliance Manager products. The Auditor case clips together perfectly (no fasteners). Our industrial designer group and the toolmakers have done a great job. The Auditor will definitely be the best looking … Continue reading

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Nuclear?

This might be a bit off-topic, but I can’t resist comment on the nuclear debate. A common assertion is that the only available, and economic, alternative to coal is nuclear (with maybe gas filling in for a period of time … Continue reading

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Which Developer: Internal or External?

Your electronic system may include 3rd party subsystems such as GPS, WiFi, Zigbee, and Telco-connected radios. These subsystems may not be stable products, creating ongoing support and compliance issues. Instability is caused by firmware upgrades, hardware changes, parts and subsystems … Continue reading

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IP based power monitoring

WattWatcher Auditor pre-production is taking place this month. Off-tool samples of the custom plastic enclosures are due week3. Trials this year with 40 prototypes have driven several changes that simplify installation and provide for robust operation. Realtime data is web delivered through the OurGreenHome … Continue reading

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External WiFi antenna

The 2.4GHz antenna developed for the WattWatcher WiFi power meters installs directly onto 20mm electrical conduit, so is simple to install in an optimal location – outside a metal meter box, for instance. The power meters include an internal antenna, and a low loss … Continue reading

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Low power WiFi

WiFi devices can use very little power and have better system performance that other low power battery operated radio systems. The WiFi Access Point knows about sleeping devices, and stores any packets aimed in their direction. The Access Point includes information about stored packets in the beacons … Continue reading

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