The easiest thing to do is simply trace all the lines back the circuit board and see if they all come from the same connection point. If they do then no problem.
For testing your generator this should work fine but very few computer power supplies can handle having their 12 volt circuit loaded up very far without the 5 volt and 3.3 volt circuits being loaded up as well being they are the two that do all the main voltage regulation work and the 12 volt power is mainly just along for the ride.
Also for charging batteries computer power supplies in stock form are for the most part useless being they don't put out the needed 13.8 - 14.4 volts on 12 volt power outputs that is necessary to charge a battery properly.
That said if you have a good understanding of how SMPS are deigned doing a bit of a redesign of the secondary voltage feedback loop and power circuits of a common computer power supply to work as a dedicated 12 - 14 + volt higher current single output DC source is doable.
For testing your generator this should work fine but very few computer power supplies can handle having their 12 volt circuit loaded up very far without the 5 volt and 3.3 volt circuits being loaded up as well being they are the two that do all the main voltage regulation work and the 12 volt power is mainly just along for the ride.
Also for charging batteries computer power supplies in stock form are for the most part useless being they don't put out the needed 13.8 - 14.4 volts on 12 volt power outputs that is necessary to charge a battery properly.
That said if you have a good understanding of how SMPS are deigned doing a bit of a redesign of the secondary voltage feedback loop and power circuits of a common computer power supply to work as a dedicated 12 - 14 + volt higher current single output DC source is doable.
