I’ve had my AC300 & 2*B300 batteries for around 8 months, and the solar panels I purchased for around 7 months, but I finally completed the solar array installation.
For the panels I purchase twelve used 250 watt panels from Santan Solar. The panels’ data is as follows: Voc is 37.6V, Vmp is 30.3V, Isc is 8.85A, and Imp is 8.27A. I have 3 panels in series and then parallel that with another 3 panels in series, for each of the 2 solar arrays. This gives me a theoretical 1500 watts for each MPPT controller, and 3000 watts total. Each array can give a maximum output of 91 volts and 16.5 amps, which will be regulated to around 1200 watts by the MPPT controller’s current limiting. I would have a theoretical maximum solar of 2400 watts into the AC300 with this setup. I’ve only had this in place for a week so I don’t yet have a lot of data yet, but even on these humid and hazy days I’m regularly seeing around 2000 watts coming in. My system has typically around 50% battery available at 7:30AM, and is full by 11:30AM.
My son and I worked out a mounting system design (he is a welder) that would be used for each array (so we had to build 2 mounts), and would allow the panels to be tilted monthly for the best solar exposure. The pictures below show some of the details of what we built.
Here is a picture of how we tilt the panels using trailer jacks re-purposed for this job. On the far side of the post you can see the arched bracket. On that bracket the small holes are drilled for each months’ angle, and the bolt is used to lock the angle in place. The large hinge-bolts are also tightened to maintain the tilt position.
Here is a picture of the back of the completed array mounting systems. Here you can also see the flexible conduit and boxes I used to bring the power cabling into the house.
Man, that is one heck of a cool installation! Do you have pointing tables figured out for the cells? Like, figure out what angle is best for average exposure with an angle indicator for them, so you can set them next year based off of what you learned for the period this year?
Since a number of the months repeat there are actually only 7 different angles needed. These angles are also stamped into the arched bracket for reference.
Yes, I’m rather excited to see myself. I still have to change what circuits my AC300 can supply via my transfer switch. I expect to use this to reduce my electric bill, as well as for power failures.
This looks so good. If the interface of Bluetti app have the solar angle tips for everyone that would be great. Wonder the company try to add some function that come with weather forecast to inform the user to adjust the solar panel.
Very impressive setup. This is exactly what my next phase of home power capability that I’m looking to achieve and your setup is inspiring to say the least. Are you within city limits? Did you have to deal with an HOA? I know both of those issues might keep me from pursuing your solution, but maybe not. Well done!
Fortunately for me it’s a “no” to both situations. I live in a rural area so it was no problem for me. I hope you don’t run into any insurmountable issues with installing solar panels at your home.
Just wanted to do a quick update. Today is a decent clear day, so it represents a good winter solar charging day. The system got down to 55% before charging really kicked in. This picture shows solar charging just a little while before getting to 100% full. It is still too early in the morning to get full charging from the solar panels as peak solar would be around 1:00 PM locally.
