Can someone explain exactly what the D050S is and does? It seems like it is nothing more than a DC to DC converter (58V output) that functions as a CV charger that will adjust the output current depending on the input power. Is that correct?
I got one for my EB240, the main reason to be able to use the car-charging 12v cigarette lighter socket on my vehicle to act as a top-up option when mobile and working.
If you look through the various bluetti solar battery lines, you can find a few uses for it (as a second charger for the AC300 versions if using solar iirc) that they show in those products video examples.
So yes it has a limited set of uses, but depending on what exactly you are trying to do, it increases the usability of certain solar-generators. Make sure the use you are thinking off is covered before buying it.
I understand the uses. I am asking more about the functionality.
what you said is correct, its a DC to DC converter. The AC wall charger takes the AC and converts it to a specific DC voltage which you then plug into the Bluetti unit for charging. This is a dedicated charging port for the AC charging brick that wants to see a specific voltage. The D050S is basically a MPPT charge controller. It takes a unknown DC voltage and regulates it up (or down) to the required voltage that you would use the wall charger with. You can then plug it to that port (for the AC charger) This allows you to plug in solar in the normal port and if you dont have AC available you can now plug in additional solar (or a DC source) via the D050S to that other port and now charge up even faster. It increases the flexibility of these units and give you more options for charging. For instance. I have the B230 expansion battery. The only way I can charge it is through my AC 200 max or i can use the AC wall charger that came with my AC 200 max. With the D050S I could also use solar panels connected to it and then into the charging port for the AC charger. Its a good thing but not absolutely necessary. In my case I elected not to get one but it definitely has its place for some users.
In the case of the EB150, there is only one input. It is a DC input that accepts 16V to 60V. For the AC200 models it is nice to have a secondary charging port. A little off topic, but the AC200 is a very nice unit. Unfortunately, it is not currently available where I live, so I opted for the EB150. I like it, but I wish that it could be charged directly via a 12V battery. That is where the D050s comes in. They are also not available here at this time. Anyway, it seems like some people are purchasing their own DC to DC converters and wiring in the appropriate cables to do the same job for $20 to $30.
You could build your own if its done correctly. Bluetti has put theses systems together for us in a nice neat package but you can buy all the components and build your own with a little effort, All it takes is a credit card and some knowledge. It may not look as nice as what Bluetti makes but it will function the same.