[RE-wrenches] In Need of a Solaredge 17.3k Inverter

[Nicholas Welch via RE-wrenches]

Hi Wrenches,
`
If anyone has an SE 17.3k in stock that they do not need in the immediate
future (~12 weeks) please contact me off list. We have just wrapped a 140
kW commercial job and we were shorted one inverter.

Thanks in advance,

Nick Welch
Sugar Hollow Solar
(937) 623-4026
NC Electrical License #U34779, NABCEP PVIP 102216-012581
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Re: [RE-wrenches] Outback FXR: Battery voltage exceeds settings

[Nicholas Welch via RE-wrenches]

Is there an FNDC on this system? I’ve experienced some of the same issues
when the FNDC terminations were loose.

On Sat, Jul 23, 2022 at 11:56 AM Jay via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Outback controllers have a tendency to be a bit slow.
>
> So they can definitely get higher than the set points but only for a
> second or two which is not going do damage anything. I’ve seen them do
> this.
>
> Especially if it’s a larger array, sealed batteries and when the batteries
> are full and a load turns on and then off.
>
> At the load off the CC is dumping watts, and the sudden loss means a short
> voltage spike.
>
> Jay
>
>
>
>
> On Jul 23, 2022, at 9:43 AM, Jerry Shafer via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
> 
>
> Most AGM's don't like voltage that high and it swells the battery and
> destroys its storage capability alot of the time
> Jerry
>
> On Fri, Jul 22, 2022, 7:50 PM Steve Higgins via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> William,
>>
>> If the battery cases swelled, they saw over 52 degrees C temps for quite
>> some time.
>>
>> While the swelling is usually only cosmetic, what's happening inside is
>> the negative plates are starting to burn. This is where you will start to
>> lose capacity and life cycle...  Extended temps of just 35C will half the
>> overall battery life.
>>
>> One of the issues with the Outback gear is they only temp compensate at
>> 5mv/Degree/cell. For all the AGM batteries I know of, you need to temp
>> compensate at 4mv.   In hot temps, this should help, but cold temps could
>> result in an overcharge.   Did you check the BTS and make sure it was
>> operating properly?
>>
>> Another issue is that BTSs are often placed on the top or lug of the
>> battery,   The top of the battery is about 5-10 deg C cooler than 1/2 way
>> down the side of the battery, Which will also cause problems with proper
>> temperature compensation, especially with warmer/colder extremes.
>>
>> Any kind of sulfation will cause an imbalance when you mix old and new
>> batteries.   I'm not a fan of mixing any age AGM batteries as there is no
>> way to tell what the SOC of the old bank vs. the new bank is.   They are
>> not like flooded batteries; you can check SGs and dissipate heat
>> much better than AGM or GEL batteries.   I discourage doing this if you
>> can.   I probably wouldn't have mixed the old and new in the same strings.
>> This way, you keep the higher resistance batteries in a single string,
>>
>> Lastly, bunching them together with no spacing between them is very bad.
>> Batteries should be in a cool, dry environment.  Most battery companies
>> want to see 1-3 inches in between each battery to allow for effective
>> cooling. When they are all bunched up together, that is a lot of thermal
>> mass that doesn't have much chance of cooling.   I have seen two parallel
>> strings of AGMs take 24-36 hours with no charging or load to drop from 45c
>> to 25C!
>>
>> Hope this helps!  Have a good weekend.
>>
>>
>>
>>
>>  
>>  
>>  
>>  
>>  
>>  
>>  
>>  
>> 
>> Steve Higgins ⋅ Technical Services Manager
>> t +1.902.597.4020  m +1.206.790.5840
>> f +1.902.597.8447  e st...@surrette.com
>>
>> <#m_-4178165466314050815_m_-3124562702126219588_SignatureSanitizer_SafeHtmlFilter_>
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>>
>>
>> --
>> CONFIDENTIALITY: The information transmitted herein is intended only for
>> the addressee and may contain confidential, proprietary and/or privileged
>> material. Any unauthorized review, distribution or other use of or the
>> taking of any action in reliance upon this information is prohibited. If
>> you receive this email in error, please contact the sender and delete or
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>>
>> On Fri, Jul 22, 2022 at 6:48 PM William Miller via RE-wrenches <
>> re-wrenches@lists.re-wrenches.org> wrote:
>>
>>> Friends:
>>>
>>>
>>>
>>> I maintain a system with 16 AGM L-16 batteries.  Eight were installed in
>>> September of 2021 and 8 were added in March of 2022.  This is 5 months
>>> apart.  I have understood that 

Re: [RE-wrenches] Enphase IQ8

[Nicholas Welch via RE-wrenches]

Hey Marco,

I have been hunting down the IQ7X for 96 cell mods recently. From our
Enphase rep, the IQ7X is being phased out. I have an order in now and am
being told ETA is around August and we won't be getting any more after
that. Food for thought.

Cheers,

Nick Welch


On Thu, Apr 14, 2022 at 8:05 PM Marco Mangelsdorf via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Thank you for the clarification, Nick.
>
> Thing is, I know that Enphase is producing micros for 96-cell SPR mods as
> part of their Equinox line.  For whatever reasons, Enphase is not making
> those micros available separately.
> marco
>
> On Thu, Apr 14, 2022 at 3:49 PM Nick Soleil 
> wrote:
>
>> My understanding is that Enphase does not currently have plans to release
>> an IQ 8 variant that works with 96 cell modules.  You will need to use IQ
>> 7X microinverters for those applications.
>>
>> 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
>> 
>>
>> NABCEP Certified Solar PV Installer #03262011-300
>>
>> California C10 Licensed Electrician #986315
>>
>> --
>> *From:* RE-wrenches  on
>> behalf of Marco Mangelsdorf via RE-wrenches <
>> re-wrenches@lists.re-wrenches.org>
>> *Sent:* Thursday, April 14, 2022 8:25 AM
>> *To:* RE-wrenches 
>> *Cc:* Marco Mangelsdorf 
>> *Subject:* [RE-wrenches] Enphase IQ8
>>
>> *EXTERNAL EMAIL* - *Use caution when responding, clicking, and/or
>> downloading attachments.*
>>
>>
>>
>>
>> Aloha all,
>> Was looking over the new IQ8 line-up.  And couldn't find a model that's
>> compatible with 96-cell mods (and the associated higher Vmp).
>> Is there an IQ8 model that's a good match for 96-celled mods?  Or is that
>> model exclusive to the deal Enphase has with SunPower to provide micros for
>> their Equinox AC mod line?
>> Mahalo,
>> marco
>>
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