I purchase a Generac/Centurion 10kw and came with a 50amp. transfer switch. What should I do to go up to 100amps.

That is a full home back-up unit. You need dealer support. Contact them direct. There is nothing online about re-flashing.

Support For Your 0058711

Generac Power Systems https://www.generac.com > product-support-details

File Type Manual (PDF) Item Number Langu... Emissions Warranty Statement WARRANTY STATEMENT EMSN E P3 0J3335 EN Exploded View (Control Panel) EV CONTROL PANEL ? HSB 0J3707 EN Exploded View (Enclosure) EV ENCLOSURE HSB 2011 0J4730 EN View 29 more rows

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  Product Manuals

  https://www.generac.com > product-support-lookup
  Model Number: G0058711 Description: 10KW/530 GUARD+12C T/SW ... Parts Manual / EV (Unit), EV GENERATOR - HSB, 0J3899, EN.
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Check the connections to the commercial power sensing unit. Sounds like it may have a bad connection to the ATS. (Automatic Transfer Switch). Generac Power Systems The best backup generator for your home business...

Sounds like a clogged fuel filter. Or the choke is on.

Manuals can be downloaded from this webpage but the model number you quote doesn't give any results ?

http://www.generac.com/Service/ManualSearch/

Your generator is equipped with a battery trickle
charger that is active when your unit is set up for
automatic operation. The trickle charger is
designed to help extend the life of your battery by
maintaining the battery when the unit is
not running.
you will need to review which circuit bord controls this and have that board replaced or serviced some of these gen heads have this built in and it will be the rectifier in the gen it self it will be a black 1x1x3/8 inch with a mounting hole in the center and 4 lug post for the wires replace this and your issue should be solved but consult your dealer for witch unit you have as to a control board external or the built in rectifier hope this helps.

Call an electrician.

Sounds like Generator mode switch should be "ON".

From Generac only. And they wont sell it to you if your not an authorized dealer with a Business license. You ll have to get it from a generac dealer like an electrician business. I know because we sell work on and istall them everyday where i work.

the instructions says the voltage regulator is automatic/digital. when you check the voltage is there any load on the generator? if applying load to the generator doesn't help, you can manually change the motor speed where the governor connects to the carborator, but it may change the frequency, but the regulator may fix it