[Closed] Please post your UPS brand and model if using it for the MK2.  

Re: Please post your UPS brand and model if using it for the MK2.

Mine is an APC Smart UPS 3000. Overkill for hte printers, but also powers many other devices...

Peter

Re: Please post your UPS brand and model if using it for the MK2.

I have 2 CyberPower LX1500GU in use for my 4 printers and PC.

Re: Please post your UPS brand and model if using it for the MK2.

Tried APC Back-UPS Pro 1200 and APC SmartUPS 1500, both worked.

Re: Please post your UPS brand and model if using it for the MK2.

Luminous (APC subsidiary) Zelio - 900VA with 150AH deep discharge battery

Re: Please post your UPS brand and model if using it for the MK2.

I contacted Prusa email support and received an answer to my question if true sine wave is required or not, and what VA rating is needed.

So, from the horses mouth, I have it that true sine is not necessary, and that the minimum VA rating is 250, and everything higher is OK.

😀

It's kind of difficult to find a decent UPS that does not meet the requirements of a Prusa i3 MK2.

It all depends on how long you want it to keep going with out power.

I realistically need 20min to switch over to generator power (if it is worth the hassle for some large print), so a small UPS is OK for me.

Cheers, Mik

Re: Please post your UPS brand and model if using it for the MK2.

I thought this may be of interest for those running UPS. This possible upgrade will give you more run time and/or allow you to run a lower rated UPS. See http://shop.prusa3d.com/forum/improvements-f14/dedicated-power-for-heater-bed--t2289.html#p18263 .

Re: Please post your UPS brand and model if using it for the MK2.

I thought this may be of interest for those running UPS. This possible upgrade will give you more UPS run time and/or allow you to run a lower rated UPS. See http://shop.prusa3d.com/forum/improvements-f14/dedicated-power-for-heater-bed--t2289.html#p18263 .

Inverter/Battery power consumption to run the i3 MK2S

Hi,

I own the Prusa i3 MK2S, running in Trinidad and Tobago on 115 Volts. I am trying a few things like running the 3D printer on an inverter/solar power and building my own UPS using a 12V transfer switch between a 12V power supply and 12V batteries to the inverter.

I would like to share my measured power draw of my the supply battery connected to a SureSine 300W pure sine wave inverter. This unit can handle 600W for 15 minutes and 300W continuously. The battery that I am using is too small, it's a 9.9 Ah 12.8V (14.4 peak charged 100%) with a maximum current draw of 30A, which I need to change to a much bigger one. Presently I cannot start a print job without preheating the bed for PLA to 55 degrees.

The power consumption while printing is from 70-380W. Only heating up the bed from cold on its own draws 280W. Once the temperature has been reached the power requirements go back to around 40-60W or less. The bed consumes more power than the extruder.

The values measured is the current draw from the battery which does not take into account the losses of the inverter. The most important point is that the current draw is over a wide range.

When I have the bigger batteries I will post some longer term experience of using a battery bank for printing, this will be useful to anyone considering similar arrangements.

I am not an expert but I feel that my inverter is already used beyond its rated continuous 300W output and if it did not have the 600W surge for 15 minutes then it would most likely not work at all. 500W continuous power or more would be best for this task.

Greetings,
Daniel

Re: Please post your UPS brand and model if using it for the MK2.

APC Back-UPS 450. Works fine.