Hi everyone! I’m really excited to share my recent project with the Bluetti AC200MAX and how I’ve been working to optimize its charging process using Home Assistant. For those who might not be familiar, the Bluetti AC200MAX is a fantastic portable power station that I’ve been using to power my outdoor adventures and small appliances around the house. However, I’ve always been a bit frustrated with the constant 500W draw from the charger when connected to the grid. It feels a bit inefficient, especially when I know I could be leveraging solar power to reduce that load.
So, here’s where Home Assistant comes into play. I’ve been experimenting with setting up a system where the charging power of the Bluetti can be modulated based on the output of my solar panels. The idea is simple: when the sun is shining brightly and my panels are generating plenty of power, the charger can run at full capacity. But when the solar output drops, especially during cloudy days or at night, the charger should adjust its power draw accordingly to avoid unnecessary strain on the grid.
The charger itself has a DC output of 58.8V - 8.5A, which gives me some flexibility to work with. I’ve been looking into using a device that can interface with Home Assistant to control the charging power dynamically. While I haven’t found a perfect off-the-shelf solution yet, I’ve been exploring some DIY options and even reached out to a few forums for ideas. One promising avenue is using a Raspberry Pi to monitor the solar panel output and adjust the charger’s power draw in real-time. It’s a bit technical, but the potential savings and efficiency gains make it worth the effort!
I’d love to hear from anyone who’s tackled a similar project or has some tips on how to make this work more smoothly. Have you integrated your solar panels with your portable power stations? How do you optimize charging during different times of the day? I’m all ears for any suggestions or experiences you’ve had!
Looking forward to hearing from you all and hopefully getting this project up and running soon! 
