Leeward Renewable Energy said its 725 MW Oklahoma portfolio hit two milestones at once. The 125 MW Huckleberry Solar site in Mayes County and the combined 153 MW Twelvemile Solar I and II in Bryan County have entered commercial operation, taking currently generating capacity to 278 MW. Salt Branch Solar I and II (145 MW, Mayes County), Mayes Solar (102 MW, Mayes County), and Twelvemile Solar III (200 MW, Johnston County) remain under construction, for another 447 MW behind the operational tranche. Google is the power purchase agreement counterparty across the output stack, with the developer citing roughly $1.5 billion of investment across the five sites and $148.8 million of projected state and local tax revenue over the operating lives.
Why the timing matters
The commercial operation date landed three days after the One Big Beautiful Bill Act’s July 4 begin-construction deadline for the Section 48E clean electricity investment credit. Wood Mackenzie’s post-deadline tally, published the same weekend, put utility-scale solar safe-harbored between mid-2024 and July 4 at 216 to 240 gigawatts DC. That is a paper stockpile of physical work milestones and equipment purchase orders, not commissioned megawatts. The LRE portfolio is a first read on how fast the safe-harbored bank starts to convert.
Two features are worth flagging.
First, the financing is hyperscaler PPAs, not merchant or utility offtake. The story fits the pattern of data center demand pulling utility-scale solar into interconnection queues on shorter cycles than the utility procurement channel. Google’s PPA position covers output from all five projects, tying a data center operator’s forward power book to Oklahoma capacity through the 2020s.
Second, the 278 MW that came online is Section 48E-eligible under the deadline that just closed. The 447 MW still in construction was already inside the safe-harbored window. The build-out is not affected by the July 4 cutoff either way.
What to track next
The next signal is cadence. If the safe-harbored bank is going to carry US utility-scale solar volume through 2027 and 2028, monthly commercial operation announcements from developers with hyperscaler offtake are the leading indicator to watch. LRE’s cadence, plus similar reads out of NextEra, Invenergy, and Clearway on portfolios already tied to hyperscaler PPAs, will show whether the 216 to 240 GW paper stockpile is a real supply cushion or a permit-and-interconnection bottleneck in disguise. Underneath the deadline noise, the story is execution capacity, not policy.