<div dir="auto">Try having them decreasing the Max Charge Rate to 50% and monitoring the AC output, specifically looking for spikes and dips in voltage and frequency via the SCP. Although you can open AC input parameters to allow for dirtier power to be qualified, I would definitely suggest against this. Sounds like they need a higher quality generator. Keep in mind that the SW 4048 is a 45A max DC charger. </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Dec 15, 2020 at 2:21 PM Ray <<a href="mailto:ray@solarray.com">ray@solarray.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p>Definitely the generator. Harbor Freight? 4 kW into a 4 kW
charger? What's the altitude? I believe that 4 kW generator is
actually only 3.5 kW continuous rated. By the time you derate
for altitude, and then account for the generator not being built
to be a prime power unit, its probably reasonable to derate it
50%. Then yet another thing, those gennies are 240/120 so you
only get half the rated power at 120 vac, and it unbalances the
load on the generator. Is that Conext 240/ 120 or just 120vac ?
<br>
</p>
<p>Its just going to be a head ache for everyone until they buy
something much better. They really need something in the 6.5 kW
to 9 kW range, and 240 to 120 transformer if the Conext is not the
240/120 model, so that the generator is loaded evenly. <br>
</p>
<pre cols="72">Ray Walters
Remote Solar
303 505-8760</pre></div><div>
<div>On 12/15/20 1:57 PM, Sindelar Solar
wrote:<br>
</div>
<blockquote type="cite">
<p>Dave,</p>
<p>I would first suspect the generator, not the inverter. Check
its output voltage and Hz under load. If it's overloading,
either (or both) voltage and frequency will drop below the
acceptable range and the inverter will unlatch its input relays,
wait for a bit, relatch and ramp up input amps until it again
overloads and the cycle repeats. You may reduce either (or both)
charging amps and overall input amps, broaden the frequency and
minimum voltage acceptance ranges (I don't recommend this),
adjust the AC output voltage of the generator, or advise them to
get a better gennie.</p>
<p>Allan<br>
</p>
<div>On 12/15/2020 11:14 AM, Dave Tedeyan
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi All,
<div><br>
</div>
<div>I am going to service a system where the homeowner is
telling me that their Conext SW4048 had been working fine
for 14 months, and then all of a sudden recently stopped
being able to charge the batteries from the generator. It is
an off grid system. </div>
<div><br>
</div>
<div>The inverter would start charging the batteries, but then
about a minute later they would hear a relay click and the
charging would stop. Then it would just keep cycling. If
they turned everything off for a while, they could then turn
it back on and charge for maybe 10 minutes before it would
start cycling. They just have a crappy 4kw generator from
Harbor Freight.</div>
<div><br>
</div>
<div>I have not laid my own eyes on it yet, but will be there
in the next day or two. Just wondering if anyone has
experienced these symptoms and have a good idea of what to
look for first.</div>
<div><br>
</div>
<div>Thanks!</div>
<div>-Dave<br clear="all">
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