NV Energy contracts 400MW of solar and 1,600MWh of batteries as one product, first power 2029

EDF power solutions North America, a San Diego-based developer, has signed two power purchase agreements with NV Energy covering the combined output of a 400 MWac solar project and a 400 MW/1,600 MWh battery system, together called the Winston Energy Project ^[1][2]. The project sits on private land in Lyon County, Nevada, and expects to start delivering electricity in October 2029 ^[3].

The structural detail is that the solar and the battery are sold as one contracted output, not two assets with two revenue lines ^[2]. At 1,600 MWh against 400 MW of power, the battery is a four-hour system ^[1], which is the duration utilities buy when they want to move midday solar into the evening peak rather than trade energy arbitrage opportunistically. The source describes exactly that use: shifting output from high solar production to periods of greater demand, plus smoothing and flexibility ^[11].

The arithmetic around the headline output is worth doing. The project expects roughly 1,110,000 MWh a year ^[6], which against 400 MW of nameplate implies a capacity factor near 31.7 percent ^[2]. Average output across the year is therefore about 127 MW, meaning a single full battery charge holds roughly 12.6 hours of the project's average generation ^[3], or about 53 percent of what the plant produces on an average day ^[4]. That is a plant whose deliverable shape is substantially under the utility's control, which is the point of contracting the pair.

The "100,000 Nevada homes" figure implies 11.1 MWh per home per year ^[5], a useful reminder that home-equivalents are a modelling convention, not a load forecast. EDF also cites avoided CO2 equivalent to more than 187,000 passenger vehicles driven for a year ^[7]. Local economics: over 400 workers at peak construction, and approximately $100 million in tax revenue over the operating life ^[4][5]. The source does not state the operating life, so that figure cannot be annualised, and it does not disclose a PPA price or contract term ^[12].

The timeline is the part that constrains other people's plans. The most recent dated item in the announcement material is a May 2026 five-year framework with Ford Energy for up to 4 GWh of storage annually and up to 20 GWh over the term ^[10]; measured from there, first power at Winston is roughly 41 months out ^[6]. Anyone building load in Nevada that assumes new firm-shaped renewable supply arriving sooner than that is assuming a resource that has not been contracted yet. EDF says it has developed 26 GW of wind, solar and storage over more than 35 years ^[9], and its origination lead, Jacqueline de Fresart, framed the deal as continued partnership with NV Energy and additional paired solar and storage ^[8]. That is a supply pipeline, not spare capacity.

What to watch: whether NV Energy's next solicitations keep specifying paired generation and storage as a single contracted product, since that changes who carries shaping risk; whether the four-hour duration holds as evening peaks lengthen; and whether the October 2029 date slips, because interconnection and equipment queues are where these dates usually go ^[3]. Also watch for a disclosed contract length, which would tell you what NV Energy thinks a four-hour battery is worth over time ^[12].