Are you certain that you have a 500W solar panel that only has an open circuit voltage of 30V?
I only ask since I have a 325W from Canadian solar that is 37V open circuit voltage. Normally manufacturers prefer higher voltage since the current can be lower as higher current means thicker cable to run.
My panels are putting out 325W @ 37V = ~8.7A. Connecting 3 of them in series is giving me 975W which is over-paneling for my AC200MAX so I end up with 900W and change in full sun on cool days.
Can you post a picture of the plate on the back of your panel?
the EP500pro input specs are this:
PV Input or T500 Input:
So it can accept two strings of solar panels with VOC (and Vimp) from 12V to 150V.
It will be powered at each strings Vimp at up 12A per string (and up to 1200W per string).
Watts = Volts * Amps.
So it will be powered at optimally 100V at 12A or 1200W, per string.
So if your 500W panel is 40V at 12.5A (for example), then 3 of them in series will give 120V at 10A = 1200W to the EB500pro.
2 strings of 3 in series will give 2400W.
See it depends on the VOC, Vimp, Imp of the panel whether it is over the max VOC (bad!), under the min Vimp (unusable by itself) or cropped to the max amps or watts.
I have an AC300 with several panels in series supplying 140 V and 6 A on each of the two DC input. I have seen over 1700 W coming in on solar energy, and if I had more panels in parallel I may get over 2400 W of DC input. The Bluetti units are well engineered.
As others have implied, this must be achieved using much higher solar/PV input voltage. It’s not false marketing, it just requires proper solar system knowledge as all power stations are designed up to a certain max amperage rating to keep costs within reason.
The 12 Amp maximum applies across the input range of 12-150V and is per MPPT controller, of which there are two in your EP500 Pro. So, we can calculate exactly the minimum voltage required to achieve the 1200W max per controller: 1200 Max Watts / 12 Max Amps = 100 Volts.