Mark: Depends on the supply and the micro. One or the other has to have isolation or bad things can happen. Check with the manufacturers to see if the devices are isolated. You could also use an isolation transformer ahead of the DC supply and be ok. You might also need to float the ground on the supply (be careful).
Lastly the control loops in the mico and the supply probably won't play well together. You can end up getting weird oscillations between the control loops in the MPPT and the CV/CI control of the supply. You might need to add some resistance and typically some inductance between the supply and the inverter to get it to track right. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mark Frye Sent: Tuesday, January 29, 2013 11:32 AM To: RE-wrenches Subject: [RE-wrenches] Dc Power Supply on Microinverter input Folks, Anyone have an idea of what would happen if I connected a bench top DC power supply with adjustable voltage and current to the pv inputs of a microinverter that is also connected on the Ac side? Would something bad happen as the inverter tries to run it's mppt on the ps? Mark Frye Berkeley Solar Electric Systems _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org CONFIDENTIALITY NOTICE: This e-mail and its attachments are intended only for the use of the individual or entity who is the intended recipient and may contain information that is privileged, confidential and exempt from disclosure or any type of use under applicable law. If the reader of this e-mail is not the intended recipient, or the employee, agent, or representative responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this e-mail is strictly prohibited. If you have received this e-mail in error, please reply immediately to the sender. P Please think of the environment before printing this email _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
