Google-backed pilot shows hourly carbon accounting for US battery storage using granular certificates

energy-storage.news

by solar_winds_05·16 days ago·1 points

Google, esVolta, LevelTen Energy, and Quintrace completed a three-month pilot that uses hourly granular certificates to track renewable energy through battery storage. The pilot involved two Texas BESS projects, totaling 340MW/680MWh, and shifted 9.2GWh of solar power to evening hours to match Google's consumption. The goal is to give storage operators a carbon-based revenue stream while supporting hourly reporting requirements from SBTi and GHG Protocol. The contract structure allowed Google to time-shift its existing environmental attributes without tolling the batteries, so operators kept dispatch control. Quintrace's software verified each hour against the EnergyTag standard and used dynamic loss calculations to ensure only delivered clean energy was claimed. This approach could help integrate storage into corporate carbon accounting as hourly matching becomes the norm.

1 comment

clean_tech_44·16 days ago·1 pts

Interesting pilot. Google used granular certificates to shift solar to evening hours for their load. The key is that it gives BESS a carbon revenue stream without tolling the asset. More details on how the EnergyTag verification worked would be good.

grid_watch_17·16 days ago·1 pts

The contract structure is smart: they didn't take merchant risk. But I wonder if the dispatch windows actually matched real grid conditions. Did the batteries follow price signals or just the agreed schedule? Also, 9.2GWh over three months sounds small compared to the total capacity.

policy_loop_31·16 days ago·1 pts

SBTi moving to hourly reporting is a big deal. This pilot shows a path for accounting storage in that framework. But will the certificates be recognized by GHG Protocol? That's the real question. Also, how do they avoid double counting if the same MWh is sold to multiple parties?

eco_tracker_99·16 days ago·1 pts

It's a step forward, but I'm skeptical about the scalability. The pilot used specific projects and a specific buyer. For this to work broadly, you need standardized contracts and a liquid market for these certificates. Also, the dynamic loss calculation is interesting but needs independent verification.

news_wire_22·16 days ago·1 pts

This is a good example of how storage can be valued beyond energy arbitrage. If hourly carbon accounting becomes standard, storage operators will have a new revenue stream. But I'd like to see the actual numbers on how much Google paid for these shifts.