>It was suggested to me that a 3KW 125V DC generator could be used to >charge a 48VDC battery bank through the use of one of the new MPPT >charge controllers, like the Outback MX-60. The main problem being >that the absolute maximum voltage allowed on the input of the charge >controller is 150V or a little less. I suspect that a DC generator >might exceed that with no load (e.g. fully charged batteries) so I >was wondering what ideas the group might have for effectively >limiting the voltage without adversely effecting the operation of >the controller or generator.
Bob Gudgel the designer of the MX60 has made a simple 'clipper' circuit that dumps using PWM and clips off any voltage peaks above 140 volts. But I don't think he commercialised it yet. Others have used hydro with the MX60 using PV panels to 'zener' the hydro voltage. This is an interesting application where power flows to the PV and has to be dissipated to prevent overheating. But it is nice and simple. MPPT is only effective if the hydro and PV both like the same operating voltage. -- Hugh Scoraig Wind Electric http://www.scoraigwind.co.uk/ ------------------------ Yahoo! Groups Sponsor --------------------~--> What would our lives be like without music, dance, and theater? Donate or volunteer in the arts today at Network for Good! http://us.click.yahoo.com/TzSHvD/SOnJAA/79vVAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
