UPS with Generator and ATS

[Anonymous user]

@voidstar
After browsing most of this forum I found below thread explaining my situation best (the second answer):

https://forums.apc.com/spaces/5/smart-ups-symmetra-lx-rm/forums/general/422/connect-the-ups-to-an-ex...

It is exactly what I want to achieve. however, there are a few differences. This setup has to placed in Indonesia where there are blackouts 2x per week on average. We intend to start the generator automatically (if the model allows it) or manually if that's the only option. So our situation will be as follows:

- Main utility power goes out
- UPS detects blackout, switches to battery within 16ms (computer load)
- (Automatic?) Transfer switch triggers generator auto-start or manually go to generator and turn on
- Generator spins up (from mains power blackout to stable generator power will be around one minute)
- Transfer switch changes from mains AC to the generator
- UPS detects good AC, switches back to line power (being fed from the generator).
- Main utility power returns
- Transfer switch changes from generator back to mains AC. Turns off generator.
- UPS detects a disturbance, transfers to battery for 10s or so.
- UPS switches back to wall power (now fed from main utility).

regarding hardware, we already have the following generator model: https://www.tokopedia.com/atlindonesia/genset-bensin-wolf-2500watt-1
This generator has always been used to power the whole network when there is a blackout. Computers, printers, etc running fine on it... But I am not sure how the UPS will react to it...

There is not much information available for this generator model as I could not find any technical sheet.

For the UPS I was looking at the following model: https://www.apc.com/shop/id/en/products/APC-Smart-UPS-SC-620VA-230V/P-SC620I

We don't need much power and for only a short time (several minutes). One computer and a few routers is all.

Questions:

- the physical location of the generator would be quite far away from the UPS (50-100m), is that a problem?
- has anyone come across a more detailed wiring diagram for such setup?
- what is a good ATS for this setup? I have no experience with ATS yet...
- Do I need 2 or 1 UPS?

All info is more than welcome...

Thanks in advance