GivEnergy has a post up now, so I guess I'll spill. Their cloud controlled energy management systems are in tens of thousands of homes. Hundreds of MWh of grid connected battery storage in total.
I used a lot of math to make myself an API token as "admin". I could've started them all charging or discharging simultaneously.
They get a gold star for their response: A calm, polite reply to my report, and a same-day fix. Pleasant follow-up communication.
Blog post with details to follow.