Should the UPS output be exactly same in normal and battery backup modes ? Of course the AC line power from the electrical utility is true sinusoidal with an accurate frequency of 50 or 60 Hertz. The typical (standby and line-interactive) UPS will pass through the line power when in normal mode. Typically only a high-quality UPS will output true sinusoidal AC power when in battery mode. A UPS ...
The VA rating tells you about the maximum load you can put on the UPS, and this can also be a very loose proxy for the quality of the components - because higher rated UPS's will typically have componentry and cooling which can support higher currents and are thus more robust.
As long as I have the tracking number, the UPS Track API works great. I use it as described on the help page:
UPS REST API - Tracking vs Track by Reference - Stack Overflow
If a UPS lasts long enough, the cost of replacement batteries overruns the initial cost. If you are buying quality UPSes, therefore, give more consideration to the running cost of the UPS than to the initial purchase price.⁶ A midrange UPS from the same manufacturer costs about ⅓ that of a true-sine UPS with the same headline specs.
When do I need a pure sine wave UPS? - Super User
You can use production tracking numbers on the UPS test environment. Moreover, on the of the , you can find a list of tracking numbers that can be useful if you want see tracking numbers with different set of information like proof of delivery.