Yes, what do you do when everything does not go as you thought it was.
You start to experiment. Just once an old APC UPS taken out of stock and looked for what batteries were installed and luckily, it has 48V as a battery voltage.
Type: APC Smart-UPS 2200RMI 3U / 230v (2200VA/1600W)
As the Powerwall had nothing to do with it, the APC UPS was connected to one of the DC 64 amp backups of the battery bank.
Yes, the APC UPS is running. Short self consumption times measuring and the volts at the transition. All just about 0.9A at 57V = 51 watts
Then klam the test of the phases (N / PE / L) ... now there were problems. Have measured cleanly at the outputs of the UPS 230V AC.
Unfortunately PE is not active. Now UPS again open and yes the PE is looped as expected only from the input 230V to the output. Accordingly without mains supply not active. That's problem NR. 1.
Have a PE grounding connected to the UPS on each case the UPS and the output to ground via PE.
Now could be tested further.
Examining L and N .... Problem Nr. 2 is there is no L or N ????
When testing against PE, it was clear that the 230V AC sine behave as once 55V AC and once 175V AC.
And with that I arrived at problem Nr. 3. If I have no L, how can I use a fuse / RCD or FI there?
I was not prepared for the problem and did not find anything to help me with my research on the internet.
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I can only note at the current time that the model UPS should not be used as an inverter replacement since the fuses in the power grid, seemingly give me size problems in the point of security.
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**** If you have other experiences with other UPS models, I would be glad about information.
Especially as far as the safety of the 230V AC output is concerned. ***
thanks
