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I’m planning on powering the Ender 3 with a 200 W solar panel with a 300 W inverter. I saw on some posts that the Ender 3 draws 500-ish watts whilst starting up but then drops to an average of 150 - 200 W.

Would the max limit of the inverter being 300 W lead to any problems whilst starting up the Ender 3 Pro?

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    \$\begingroup\$ The 200W solar panel will surely be a bigger problem. \$\endgroup\$ – Brian Drummond May 27 at 19:04
  • \$\begingroup\$ Welcome to EE.SE. Posts with correct spelling, punctuation, and grammar are easier to read. They also tend to get read and upvoted more frequently. I've capitalised the brand names and 'W' for watt in your post to improve legibility See the site policy in Write to the best of your ability on the site's help pages. You could consider explaining what an Ender 3 Pro is for those not familiar with it. \$\endgroup\$ – Transistor May 27 at 19:04
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    \$\begingroup\$ In short, no this isn't going to work, even in full sun. A cloud would pass by, and the print would be messed up. Consider at least double the capacity (400W panel, 600W inverter) and a suitable battery storage solution (for when that cloud sneaks by.) \$\endgroup\$ – rdtsc May 27 at 19:54
  • \$\begingroup\$ The bed heater and hot end heaters will be switching off and on randomly during printing to maintain temperature - there is a good chance that both will be on at the same time, so the printer will require 500 watts at those times - the inverter will likely shut off due to the overload (ef it even makes it through the initial warm-up period). \$\endgroup\$ – Peter Bennett May 27 at 20:32
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    \$\begingroup\$ In the interest of science, I just checked my Ender 3 power consumption while printing a small job - it draws about 10 watts while idle, 50 watts to 260 watts while printing, as the bed heater cycles, so you may be able to run it from a 300 watt inverter, but you will need a battery between the solar panel and the inverter. \$\endgroup\$ – Peter Bennett May 27 at 20:51

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