That's after 30% ITC subsidy, so unsubsidized price is probably more like 6.25 cents/kWh.
The price even includes a 30MW, 120 MWh battery.
For comparison, NV Energy signed a 100MW ppa without storage recently at $0.0387 per kWh after subsidy.
To state the obvious: The storage is intriguing, as it could address some of the issues with high solar penetration.
The combined system could output ~60MW during the day, and ~30MW for the four peak load hours, whenever they occur, so adding this system wouldn't increase the need for peaker plants as storage-free solar might.
And they could charge faster when grid power was cheap, which could help avoid negative power pricing.
(The four hour battery discharge time reminds me of the "clean peak standard" proposal, strategen.com/new-blog/2016/12/1/evolving-the-rps-a-clean-peak-standard-for-a-smarter-renewable-future )
Sources:
utilitydive.com/news/updated-tucson-electric-signs-solar-storage-ppa-for-less-than-45kwh/443293/
utilitydive.com/news/nv-energy-buys-utility-scale-solar-at-record-low-price-under-4-centskwh/401989/
The price even includes a 30MW, 120 MWh battery.
For comparison, NV Energy signed a 100MW ppa without storage recently at $0.0387 per kWh after subsidy.
To state the obvious: The storage is intriguing, as it could address some of the issues with high solar penetration.
The combined system could output ~60MW during the day, and ~30MW for the four peak load hours, whenever they occur, so adding this system wouldn't increase the need for peaker plants as storage-free solar might.
And they could charge faster when grid power was cheap, which could help avoid negative power pricing.
(The four hour battery discharge time reminds me of the "clean peak standard" proposal, strategen.com/new-blog/2016/12/1/evolving-the-rps-a-clean-peak-standard-for-a-smarter-renewable-future )
Sources:
utilitydive.com/news/updated-tucson-electric-signs-solar-storage-ppa-for-less-than-45kwh/443293/
utilitydive.com/news/nv-energy-buys-utility-scale-solar-at-record-low-price-under-4-centskwh/401989/
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