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3, 'Virtual Power Plants'. Another interesting plan to use batteries to avoid a grid upgrade. The utility covering Lebanon, a small New Hampshire town, is offering to subsidise household batteries for 300 homes. The aim is to avoid a $0.6m substation improvement cost but, more importantly, to reduce the need to import power into the area at times of high prices. The utility will be able to control the batteries during such periods. The supplier also wants to switch to a ‘time of use’ tariff for its battery-equipped homes, promising the owners savings of $500 a year. I suspect that this type of arrangement will become conventional: the utility will control the home battery and use this control to hold down demand peaks or to deal with unexpected grid events. The homeowner will see lowered bills if she transfers most electricity use to the cheaper hours of the day.
4, Batteries and grid reliability. The world’s largest battery, at Hornsdale in South Australia, has proved its value in its first months of operation. The Australian grid operator released a report saying that the 129 MWh Tesla battery ‘can provide a range of valuable power system services and including rapid, accurate frequency response and control’. It also stated that the unit ‘is capable of responding more rapidly to a contingency event than conventional synchronous generation’. The grid operator concludes that batteries should be rewarded more generously than other forms of electricity supply because of their greater responsiveness.
orrery wrote: »
Longer term, the Grid scale batteries are likely to be a different technology - Flow Batteries.
zeupater wrote: »
I expect the home battery system market to remain very slow until fully installed prices fall below £150/kWh and growth to accelerate quickly as prices approach £100/kWh.
Martyn1981 wrote: »
Just went into the Tesla site
Martyn1981 wrote: »
Just went into the Tesla site to show Wifey what the Model 3 looks like, well one can dream, and then drifted to the energy / Powerwall section for a quick look.
Whilst eyeing up the Powerwall II it dawned on me just how thin it is, so looked at the specs for some numbers, and saw it was 155mm for D for depth under dimensions.
My brain quickly pointed out to me that that's just over 6 inches.
Then noticed that the image had metric and imperial figures already on it ...... but ...... none of them match!
The height (or length) is out by over an inch, or 32.4mm to be pedantic.
Given Tesla's reputation for attention to detail, I can't help wondering if this is test/trick?
Reminds me of a holiday booking a couple of decades back. We were getting the tickets from the lovely lady in the high street store, when she told us our luggage allowance was two suitcases each of 20kg or 40lbs. I asked which was it, 20kg or 40lbs, and Wifey (to be) kicked me. :silenced:
Martyn1981 wrote: »
Well no reply from Tesla (so much for an upto 48hr response), and the specs haven't changed.
Item 1, Behind-the-meter batteries. A small New Hampshire utility wants to sell or rent 1,000 Tesla batteries to its customers to avoid the need to upgrade a distribution link. The grid work would have resulted in costs to customers of around $700,000 a year ($700 a battery). Customers will benefit from being able to shuffle their electricity use between high and low cost portions of the day. The utility will also save money by taking control of the batteries at times when it needs to adjust power demand.
In twenty years’ time, this will be the pattern worldwide: batteries will be provided by utilities or third parties who will offer ways the residential customer can save money but will retain final control over whether the battery is charging or discharging at any particular moment. There’s much still to be worked out, but some variant of the New Hampshire scheme will become universal.
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