I am currently in communication with Bluetti support about how to wire an eb3a to the main panel (only on some essential load). I am getting conflicted information and I’m struggling with communication.
I have EB3A Europe version and I specifically am enquiring about the type of transfer switch to use (switch both neutral and live or just the live) and the wiring of the neutral.
Note: I am not using solar, the EB3A will be charging straight from the grid via the AC input.
Bluetti says that it is forbidden to connect the Bluetti input neutral to the output neutral.
So then presumably, I need to use a transfer switch that switches both neutral and live. right?
BUT, if I cannot connect the output neutral to the input neutral, how am I supposed to reference one of the two output legs L1/L2? does that mean I should keep L1 and L2 completely floating?! is that safe?
if I’m not allowed to connect one of them to neutral (presumably will break the inverter? or what is the reason?), I assume I’m also not allowed to connect one of them to Earth either for the same reason, since neutral and earth have similar potential, and will also break the inverter? is this correct? so is there a solution?
disclaimer: my electrical knowledge is somewhat basic, so there may be mistakes in my reasoning. Please correct me if I got things wrong.
Also, I do not plan to do the wiring myself. I will get an electrician. I just want to get the accurate info from Bluetti so I can give this info to the electrician because I read in the forums that people have fried their Bluetti due to the neutral wiring
OK, the info you have from Bluetti is the same as what they provided us. We only know of one company (Eco Flow) that allows their neutral to be bonded to the house neutral and meet the National Electrical Code ( I know you are in Europe). No matter where you live the theory is the same and safety is paramount. Europe is 220 v I believe one leg with a neutral and a ground…correct?
Basic info: if you are switching completely away from the grid some equipment will not operate. New equipment has the ability to “look for” the neutral being bonded to the grid. Our switch can operate either not switching the neutral and bonding it to the house neutral ( per code) and switching the neutral away from the grid system to satisfy items like a Bluetti. Again, the issue is not being bonded to the grid, safety, and the code.
Not knowing Europe code, I cannot speak to what they allow. In theory having a place where the unbalance of the load travels ( the neutral) and connect them all at One location creates a safe system. We would be more than happy to help you more if needed, you can contact us direct.
Short answer you can not uses the EB3A to power your 3 phases system.
If you know what you do you can do it. Safely.
But you can’t have it permanently wired into your system like a UPS and have it automatically switch over.
Only if the EB3A is not connected to an AC input you can connect its outputs N to its PE. directly at the unit. and you could then connect this to you distribution boxes input PEN and L.
you theoretical don’t even need to disconnect PEN from the grid.
But you have to disconnect L1-L3
