BIGTREETECH UPS 24V V1.0 Resume Printing While Power Off Module Sensor for SKR V1.4 Turbo/SKR Mini E3 V3.0/Octopus V1.1/Manta M4P/M5P/M8P, Ender-3 CR-10 3D Printer Parts

You need to print a box to put this into and caution must be used as you are handling wall power when in use. But otherwise this is an excellent addition for a 3d printer that doesn't have auto power off as an included function. There are youtube videos you can look up for guidance on assembly and use.

Well, it works and keeps the printer running for a short while, after power loss.The way this device works is to charge the 9 5 Farad capacitors. I've seen the principal applied in other electronic devices, but internally. If power loss occurs, the circuit puts the stored energy onto the supply line. Basic UPS function. My concern is the power supply. Perhaps a cheap one may not have any protective circuits and feeds energy back into the power supply. Haven't done any research / tests in this regard. I have a Mean Well supply and it would be a pity, if it gets damaged over time.. Right now, all seems well!Because the Mini UPS, puts constantly energy onto the supply line, it may take a minute to deplete the stored energy after the supply is powered off via power switch.It may help with short power losses, e.g. a glitch on your house entry power panel, but at the most for a minute. I believe the idea is just that, enough time during printing to save the current printing position etc.Additional edit:After a few tests, I came to the conclusion that it will, currently, only work if the TFT / Display is in either in Marlin simulation or is a display that only works in Marlin mode.If you use a TFT35 for example, it does not offer a resume print option after power is restored. I added the two ribbon flat, to find out if it would work in Marlin simulated mode. Viola, there was the option to resume print and it actually did finish the test print.Conclusion:On a Bigtree TFT35 in Touch screen mode, It will only be helpful if there is a very short power glitch / outage shorter than a few seconds. The resume print option does, as of now (5/16/21), not exist! in touch mode.

This thing is really cool!, BUT if you have a printer like a Ender 3 V2 with the heated glass bed that releases the print when it cools down, this....or any "print resume" feature/device, will not work since unless it resumes right away, the print will be loose and not be printable. I guess one could run a pin to a relay on a battery backup just for the bed, but in that case it may be prudent to just get a regular 120v UPS used for PCs etc. You will prob need a big one though depending on how long outages tend to be in your area. If you get brown outs, it should be fine, but if it goes out for hours, it will prob die. Other than

I bought the skr e3 v2 for my ender 3 pro and it works fine. I was confused as to if since the board is different, does it have also a different interface with the power resume, so I bought this power resume. But testing the new skr e3 v2 board revealed that it did work fine with the original ender 3 pro power resume. the only way I saw to get this information out there, was to write a review. Even though I did not use it, I did not want to give a bad rating just to get this info out there. And after all I am happy with their main board itself. Plus for the price, these are nice big capacitors, that I might use elsewhere.

The only problem is the UPS stays on too long.... on a BTT SKR 1.3. In order to resume print the printer must lose all power then on reboot it will give you the option to resume print. Here is the problem the UPS senses power interruption and saves to SD card and moves the Z axis away from print. Then the power coming from UPS lasts too long allowing the bed and hotend to cool down the printer will stay on for 2 to 2 1/2 minutes. If the UPS only lasted long enough to move the Z axis and save to SD then allowed a reboot it would be perfect. I am looking at it to see if removing a few of the super caps can perfect the performance by reducing the up time. I contacted BTT but they do not understand

This PSU has saved more than is fair share of prints since I purchased it. My apartments suffer from the occasional power flicker and this has saved multiple prints from failing 2 or 3 days in when the power blips for a few seconds. If you are using an SKR Mini E3 v1.2 or v2 mainboard, get this!

Had two separate units installed on two control boards. First one arced immediately and damaged the board. A replacement unit attached to a backup board arced after about four days, damaging that board. I had to eat the boards. Will risk power interruptions before using this item again.

So this works as advertised, but I'm removing it from my printer. The reason is that the initial inrush current to initially charge the capacitors is high enough to trigger the over current protection on my PSU which causes the printer to shut down and re-start a few times until the capacitors charge up. This occurs every time I power my printer on with a discharged UPS board. I feel like that is really hard on my electronics, and will likely cause havoc when updating firmware.I've seen reports of some people working around that problem by using longer wire with smaller gauge, but that seems like a dangerous hack...I'm still giving it three stars since it works with Marlin, and provides enough storage to cleanly pause a print, but the implementation is not very elegant and I'm afraid it will damage my electronics over time.