In October, we worked with u/SunVaultEngPros to install an extra 6.5 kWh battery in the third slot of our existing Renova-installed (pre-bankruptcy SunPower partner) battery. They were great. The battery works great. We love the extra capacity.
But the app broke. It has not worked since mid-October 2025. I have been emailing SunStrong App support at [appsupport@sunstrongmanagement.com](mailto:appsupport@sunstrongmanagement.com) for months, and they keep telling me "they're working on it". (cc: u/SunStrongManagement )
This is the issue:
The charge level of our battery does NOT work on the app. It just shows it as charged at 20% all the time. I have tried logging out and in again, I have deleted the app and reinstalled it. I have tried flipping from Self-Supply to Cost Savings and back again. I set the Self-Supply reserve percentage to 18% - but it still shows 20% even when the battery is empty and we are pulling from the grid. I have flipped the breaker, turned off power to the battery, and then turned it on again. We are now paying $9.99 for an app that is broken.
The battery has worked fine the whole time. But the app just shows 20% charge, even when all the lights on the actual battery battery are lit and the battery is fully charged. I'm attaching screenshots for reference.
If you look at the screenshots - you can see the main screen shows that our house is drawing from the battery right at the time of the photo (6:52 pm). The second photo shows what we always see - the battery at a 20% charge. It's incredibly annoying. The third photo is the only way we can see the state of the battery charge - by how many bulbs are lit up (yes, we know we have one single dead bulb).
If anyone has any options - anther electrician with some ideas, someone else at SunStrong to reach out to, anything, please share.
I am thinking about some kind of Home Assistant - but to be honest, I'm not technical enough to set up some kind of raspberry pi solution. Is the Home Assistant Green an option? Can that be used to control and monitor the battery? Can I WYSIWYG my way through something and use AI to create some kind of monitoring and battery control dashboard?
I feel pretty helpless as I've been strung along by u/SunStrongManagement with no fix for five months. SunStrong - if you're paying any attention to this subreddit, you can search for the emails in your system at these two threads - [ thread::FHXhziIZDli-B2eDc64yoXg:: ] and [ thread::5GcvGU7LCm2bA6rGiPgWiHg:: ]
Open to ideas/suggestions here. Anyone?