Frontier locks in $110m equity for WA's biggest solar-battery hybrid

Frontier locks in $110m equity for WA's biggest solar-battery hybrid The Perth developer's Waroona project clears its first funding hurdle, but two-thirds of the $310m cost still needs financing before stage one breaks ground. Frontier Energy has secured firm commitments for $110 million of new equity, the first hard money behind what would be Western Australia's largest solar-battery hybrid on the state's main grid. The Perth-based developer said the placement to institutions and family business offices covers nearly a third of the cost of its Waroona project, now configured as a 132 MW solar plant paired with an 81.5 MW battery storing 565 MWh over 6.9 hours.⁵ That matters because Waroona has stalled before. After several false starts and different configurations, the equity raise is the closest Frontier has come to a final investment decision, and it sets a template other WA developers will watch as they try to bankroll firmed renewables on a grid with no interconnector to lean on.⁵ The numbers are still provisional. The $110 million is conditional on shareholder approval, and Frontier needs to land roughly another $220 million to cover the $310 million build cost, plus $17 million in contingencies.⁵ Only after those transactions close does the company say it will start work on a stage two of similar size.⁵ The economics Frontier is pitching lean heavily on the battery. The developer expects $40.5 million in revenue from energy sales, frequency control services and large-scale generation certificates, and says most of that will come from selling excess output from the battery rather than the solar farm.⁵ After $10 million of operating costs, including an estimated $3 million to charge the battery, it projects EBITDA of $62.5 million and free cash flow of $32 million once debt and tax are paid.⁵ Those are the figures of a merchant storage play dressed as a solar project. The 6.9-hour duration is unusually long for a battery this size, which tells you Frontier is betting on capturing evening price spreads rather than chasing short-duration frequency revenue alone.⁵ The market it would plug into is already rewarding storage over gas. In late May (2026-05-29), big batteries swept a South Australian firming tender that was open to gas generators, winning contracts to supply firm capacity at times of system stress.⁴ South Australia power spot last settled at A$139.77 (2026-06-06), a reminder that WA's eastern peers are pricing volatility that storage is built to monetise. But the supply chain remains the brake on every battery thesis. BloombergNEF panelists in April said high battery pack prices, shipping bottlenecks and other constraints are dampening near-term deployments even as demand runs strong.³ Frontier's contingency line, $17 million on a $310 million build, reads as a hedge against exactly that cost risk.⁵ The grid value of storage is no longer in question. In Britain, National Grid's system operator used around 475 MW of battery capacity to restore frequency within four minutes of last August's blackout that hit some 1.1 million customers, and its final report this week (week of 2026-05-18) asked whether more reserve is needed.² Smaller markets are scaling fast too: Greece connected its first 16 MW of storage in May (2026-05-21) and plans 650 MW online this year.¹ Frontier's ambition runs further than stage one. The company envisages adding third and fourth stages that would take Waroona to around 1,000 MW of generation and up to 660 MW of battery capacity, roughly eight times the storage now being financed.⁵ That is a long way from $110 million of committed equity. The near-term read is straightforward. Stage one only proceeds if Frontier closes the remaining $220 million and wins shareholder approval, and the project's returns hinge on a battery arbitrage thesis that assumes WA evening spreads hold up as more storage floods the same trade.⁵ The risk is that everyone has spotted the same opportunity at once. What to watch is whether the debt and the second equity tranche land on the terms Frontier has modelled.⁵ If pack prices stay elevated through the build, that $17 million contingency could prove thin, and the EBITDA math that makes Waroona bankable starts to wobble.^5,3