The start-up voltage is triggered by Voc, not Vmp.
Cordially, Nick Soleil Enphase Energy Senior Product Manager (707) 763-4784 x7267 // office (707) 321-2937 // cell Powering What’s Next™ | The Enphase Energy Management System<https://enphase.com/en-us/products-and-services/envoy> NABCEP Certified Solar PV Installer #03262011-300 California C10 Licensed Electrician #986315 ________________________________ From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> on behalf of Maverick Brown via RE-wrenches <re-wrenches@lists.re-wrenches.org> Sent: Wednesday, April 13, 2022 6:19 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Cc: Maverick Brown <maver...@mavericksolar.com> Subject: Re: [RE-wrenches] Module - microinverter compatibility question EXTERNAL EMAIL - Use caution when responding, clicking, and/or downloading attachments. I would say it’s likely okay, but to speak in the vernacular, “watch out sucka”. Vmp will be lower due to temperature coefficient, dirt on the panels and degradation over time. But, the inverter likely wakes up above the minimum Vmp as Voc has the voltage but the inverter can track below minimum Vmp after it wakes up and starts tracking. How far below official Vmp can it track? 18-58 is the tracking range. Inverter technical specs: https://www4.enphase.com/sites/default/files/IQ7A-DS-EN-US.pdf I saw an inverter comparison document but could only find this AU version just now. https://www4.enphase.com/sites/default/files/downloads/support/IQ7A_Vs_IQ7plus_in_Australia.pdf Maverick Brown Off-Grid Solar Commander since 2006 Maverick Solar Enterprises, Inc. • Solar Commander Remote Power • SunFlow Systems Cathodic Protection maver...@mavericksolar.com 512-460-9825 On Apr 13, 2022, at 3:57 PM, Drake Chamberlin via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote: I'm concerned that a microinverter - module pair that has been specified by a supplier may not work. The maximum power voltage is very close to the minimum starting voltage. The Voc is adequately high. An Aptos DNA-120-MF26-365W is paired with an Enphase IQ 7A • Minimum start voltage of the inverter is 33 V • Vmmp of the module is 33.96 V • Voc of the module is 40.7 V Is the 33 V starting voltage going to be a problem with a module STC Max power voltage of 33.96 V? Is it the Voc that determines the starting of the inverter or the Vmmp? Thanks, Drake Drake Chamberlin Athens Electric LLC Ohio Electrical Contractor’s License 44810 CO Master Electrician’s License 4526 NABCEP Certified PV Installation Professional -- _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org<https://urldefense.com/v3/__http://re-wrenches.org__;!!J0D89H32QIeNiQ!1YaWTKtuWACbX7jbUnpewPfuGhNy6l0n_ndhFXRzKE3aR8KdumgyRzwiCi8b4rlCOMumj6vuADri4RAgDEYGDOs3Ciw_ic73BA$> List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<https://urldefense.com/v3/__http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org__;!!J0D89H32QIeNiQ!1YaWTKtuWACbX7jbUnpewPfuGhNy6l0n_ndhFXRzKE3aR8KdumgyRzwiCi8b4rlCOMumj6vuADri4RAgDEYGDOs3Ciw05cM8NQ$> There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/<https://urldefense.com/v3/__https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/__;!!J0D89H32QIeNiQ!1YaWTKtuWACbX7jbUnpewPfuGhNy6l0n_ndhFXRzKE3aR8KdumgyRzwiCi8b4rlCOMumj6vuADri4RAgDEYGDOs3CizbN8xV0g$> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<https://urldefense.com/v3/__http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org__;!!J0D89H32QIeNiQ!1YaWTKtuWACbX7jbUnpewPfuGhNy6l0n_ndhFXRzKE3aR8KdumgyRzwiCi8b4rlCOMumj6vuADri4RAgDEYGDOs3CixlA3m9IQ$> List rules & etiquette: http://www.re-wrenches.org/etiquette.htm<https://urldefense.com/v3/__http://www.re-wrenches.org/etiquette.htm__;!!J0D89H32QIeNiQ!1YaWTKtuWACbX7jbUnpewPfuGhNy6l0n_ndhFXRzKE3aR8KdumgyRzwiCi8b4rlCOMumj6vuADri4RAgDEYGDOs3CiygOmxTfQ$> Check out or update participant bios: http://www.members.re-wrenches.org<https://urldefense.com/v3/__http://www.members.re-wrenches.org__;!!J0D89H32QIeNiQ!1YaWTKtuWACbX7jbUnpewPfuGhNy6l0n_ndhFXRzKE3aR8KdumgyRzwiCi8b4rlCOMumj6vuADri4RAgDEYGDOs3CiwADjmR-w$>
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
