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<p>Isn't that too much array power for an MX60? Just based on the
numbers you gave, it looks like over 3kw, which is 63 amps at
48vdc. He didn't mention the actual PV module ratings, but I
suspect its just way too much array power. It might work for
awhile, but its going to start cooking things (as it seems it
has). I never design off grid like folks design GT systems with
over sized arrays. You want reliability off grid, and that means
leaving some head room in the design, so that the controller isn't
clipping all day. <br>
</p>
<p>I'd replace the MX60 with an MX80, and then you and the customer
can be bored for a decade. It will make more power too,
especially on cold, sunny days when you really need it.<br>
</p>
<p>Ray Walters<br>
Remote Solar<br>
</p>
<div class="moz-cite-prefix">On 4/23/2024 12:47 PM, Todd Cory via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1713898051.66436560@webmail.finestplanet.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<font size="2" face="georgia">
<p
style="margin:0;padding:0;font-family: georgia; font-size: 10pt; overflow-wrap: break-word;"><span
style="color: #000000; font-family: georgia; font-size: 13.3333px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">My
old MX60 said " hot" when the fan had failed.</span><br
style="color: #000000; font-family: georgia; font-size: 13.3333px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">
<br
style="color: #000000; font-family: georgia; font-size: 13.3333px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">
<span
style="color: #000000; font-family: georgia; font-size: 13.3333px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">Todd</span></p>
<!--WM_COMPOSE_SIGNATURE_START--><!--WM_COMPOSE_SIGNATURE_END-->
<p
style="margin:0;padding:0;font-family: georgia; font-size: 10pt; overflow-wrap: break-word;"><br>
"MX 2 Hot (Very rare) Either the MX60 is too hot or its
internal temperature sensor is shorted. If this message
appears, carefully check if the MX60’s heat sink is extremely
hot. The heat generated by the MX60, and therefore its losses,
is proportional to input voltage times output current. Avoid
installing the MX60 in direct sunlight to help control its
operating temperature."</p>
<p
style="margin:0;padding:0;font-family: georgia; font-size: 10pt; overflow-wrap: break-word;"> </p>
<p
style="margin:0;padding:0;font-family: georgia; font-size: 10pt; overflow-wrap: break-word;"><br>
<br>
On Tuesday, April 23, 2024 11:19am, "William Miller via
RE-wrenches" <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a> said:<br>
<br>
</p>
<div id="SafeStyles1713897907">
<p
style="margin:0;padding:0;font-family: georgia; font-size: 10pt; overflow-wrap: break-word;">>
If the fan fails would there be an error message? As always,
I looked this<br>
> up before posting. The manual is not clear on the
matter.<br>
> <br>
> William<br>
> <br>
> Miller Solar<br>
> 17395 Oak Road, Atascadero, CA 93422<br>
> 805-438-5600<br>
> <a class="moz-txt-link-abbreviated" href="http://www.millersolar.com">www.millersolar.com</a><br>
> CA Lic. 773985<br>
> <br>
> <br>
> -----Original Message-----<br>
> From: RE-wrenches
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On<br>
> Behalf Of MDElectricSolar via RE-wrenches<br>
> Sent: Tuesday, April 23, 2024 6:58 AM<br>
> To: RE-wrenches<br>
> Cc: MDElectricSolar<br>
> Subject: Re: [RE-wrenches] PV/Charge Controller
Troubleshoot Help<br>
> <br>
> It may be the fan. I had an FM 80 where the fan went
bad that caused very<br>
> limited solar production throughout the day.<br>
> <br>
> Michael D Nelson<br>
> MD Electric & Solar, Inc.<br>
> 707-684-0064 mobile<br>
> 707-884-1862 office<br>
> <a class="moz-txt-link-abbreviated" href="http://www.mdelectricsolar.com">www.mdelectricsolar.com</a><br>
> <a class="moz-txt-link-abbreviated" href="http://www.facebook.com/mdelectricandsolar">www.facebook.com/mdelectricandsolar</a><br>
> <br>
> <br>
> > On Apr 23, 2024, at 6:54 AM, jay via RE-wrenches<br>
> > <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a> wrote:<br>
> ><br>
> > HI Jim,<br>
> ><br>
> > The CC is sure suspect.<br>
> > You didn’t mention what the battery voltage is.<br>
> > Those CC have a hard PV watt input limit.<br>
> ><br>
> > You can try and set it back to factory default and
then reprogram,<br>
> > sometimes that works.<br>
> ><br>
> > I don’t use the FM-60, but always the FM-80
because of the fan<br>
> > replacement. the 80 takes 3 minutes, the 60 takes
2 hours.<br>
> ><br>
> > jay<br>
> ><br>
> >> On Apr 23, 2024, at 6:00 AM, Jim Gowdy via
RE-wrenches<br>
> >> <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a>
wrote:<br>
> >><br>
> >> I'm troubleshooting the solar aspect of a
small offgrid 120v outback<br>
> >> system and need some opinions. The customer
was complaining that the<br>
> >> generator was running too much so I went out
to their property and<br>
> >> investigated. The solar array consists of 16
total panels (4 strings of<br>
> >> 4). At the combiner box, I took the voltage
and amperage reading of each<br>
> >> string and found the following......BREAKER 1
(85VDC/8.87A) BREAKER 2<br>
> >> (84.5VDC/8.9A) BREAKER 3 (.03VDC/0A) BREAKER
4(85VDC/8.89A). Breaker 3<br>
> >> string was not producing and so I did a fix
and then read<br>
> >> (87.1VDC/8.43A). After reviewing the online
monitor since that fix from<br>
> >> a few days prior I'm realizing that the first
day after had 4.5KWH<br>
> >> production, second day had 0.7KWH production,
and yesterday had 0.3KWH<br>
> >> production.....sun has been out without
clouds. The 60A Outback charge<br>
> >> controller shows there is PV voltage, but
noticed it was in "silent mode"<br>
> >> a good amount of time. Charge controller is
old, but all the other<br>
> >> equipment was updated about a year and a half
ago. I was wondering if<br>
> >> there is a way to diagnose if the charge
controller is bad without just<br>
> >> replacing it and what does it mean when it's
in "silent mode". Another<br>
> >> side note is that their generator threw an AGS
fault code on the MATE3<br>
> >> controller and found that the generator has
problems so I ended up<br>
> >> turning from "auto" to "off"<br>
> >> --<br>
> >> Jim with Gowdy Electric<br>
> >> Cambria, Ca 93428<br>
> >> business 805 927 2630<br>
> >> cell 805 975 5279<br>
> >>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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