# Selecting an alternator/generator

I am designing anenergy regeneration system using a pulley attached to the wire rope of a track elevator using a 3:1 sprocket ratio I am getting around 670 RPM$$`$$s I am using two 6 volt lead acid batteries in series match to a 12 volt pure sine wave inverter I am trying to figure out what alternator/ generator should I use that will charge my system and knowing the 670 RPM what output can I expect

• Two 6 volt batteries in series give you 12 volts. That won't run a 24 volt inverter (assuming you mean an inverter that requires a 24 volt power source). Sep 22 '19 at 4:15
• For one approach to designing a custom alternator for non-standard RPMs, look at small wind turbine expertise, e.g. here scoraigwind.co.uk/contents Sep 22 '19 at 14:13
• Yes sorry I meant a 12 volt inverter Sep 23 '19 at 0:56