[RE-wrenches] Enphase IQ7 versus IQ8

Wed Jul 13 08:57:28 EDT 2022

Are the IQ-7 inverters going to remain available? The additional cost of 
the IQ-8 micros killed one project where I couldn't find a good source 
for IQ-7s.

Drake Chamberlin
Athens Electric LLC
Ohio Electrical Contractor’s License 44810
CO Master Electrician’s License 4526
NABCEP Certified PV Installation Professional

---

On 2022-07-12 19:03, Nick Soleil via RE-wrenches wrote:

> That is correct, Jay.  You only need the rapid shutdown switch if you 
> have IQ 8s and an IQ System Controller.
> 
> One of the big advantages of the IQ 8 over IQ 7 when paired with 
> storage is that the 1.5 PV to storage ratio does not apply, so you can 
> install larger PV systems with smaller battery systems.
> 
> Cordially,
> 
> Nick Soleil
> 
> Enphase Energy Senior Product Manager
> 
> (707) 763-4784 x7267  // office
> 
> (707) 321-2937  // cell
> 
> Powering What's Next(tm)_ | _The Enphase Energy Management System
> 
> NABCEP Certified Solar PV Installer #03262011-300
> 
> California C10 Licensed Electrician #986315
> 
> -------------------------
> 
> From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> on behalf 
> of Jay via RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Sent: Tuesday, July 12, 2022 3:54 PM
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Cc: Jay <jay.peltz at gmail.com>
> Subject: Re: [RE-wrenches] Enphase IQ7 versus IQ8
> 
> EXTERNAL EMAIL - Use caution when responding, clicking, and/or 
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> 
> Hi Jason
> 
> And if you don't have the smart controller/battery system then you do 
> not need this proprietary rapid shut down switch correct?
> 
> Jay
> 
>> On Jul 12, 2022, at 3:25 PM, Jason Szumlanski via RE-wrenches 
>> <re-wrenches at lists.re-wrenches.org> wrote:
> 
> Yes, they require a proprietary rapid shutdown switch that connects to 
> the smart controller. This would be in addition to a visible load break 
> disconnect if the utility requires it. You cannot fulfill both 
> requirements with one switch, and it requires a line voltage circuit be 
> run from the smart controller to the rapid shutdown switch.
> 
> On Tue, Jul 12, 2022, 5:15 PM Mark Frye via RE-wrenches 
> <re-wrenches at lists.re-wrenches.org> wrote:
> 
> Do you need the additional switch if you use the Enphase battery?
> 
> From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf 
> Of Jason Szumlanski via RE-wrenches
> Sent: Tuesday, July 12, 2022 11:38 AM
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Cc: Jason Szumlanski <jason at floridasolardesigngroup.com>
> Subject: [RE-wrenches] Enphase IQ7 versus IQ8
> 
> I am trying to figure out why it is a good idea we use the IQ8 in 
> anything other than a solar only backup scenario. If there are Enphase 
> batteries involved, wouldn't the IQ7 do the same job on the roof? In a 
> straight grid tied scenario, again the IQ7 would do the exact same 
> thing. You would not have an upgrade path to solar only backup, of 
> course.
> 
> I'm just having a hard time understanding the value proposition of the 
> IQ8 in most of the situations I encounter. They cost significantly 
> more, and you need an additional rapid shutdown switch when using 
> batteries that can be quite a pain in some scenarios.
> 
> Am I missing something about the switching speed, energy harvest 
> capability, or the way they interact with batteries that makes them 
> better?
> 
> P.S. I am aware of the very small power output differences by model 
> number and I am referring exclusively to 240 volt applications. I 
> understand the 208 volt advantages of the IQ8.
> 
> Jason Szumlanski
> 
> Florida Solar Design Group  
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