U get what u pay for…………
Dana Orzel Great Solar Works, Inc. C - 208.721.7003 d...@solarwork.com Idaho Contractor - # 028765 Idaho PV # 028374 NABCEP # 051112-136 <http://www.solarwork.com/> www.solarwork.com "Responsible Technologies for Responsible People since 1988" P Please consider the environment before printing this email. From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Ray Sent: Tuesday, December 15, 2020 12:21 PM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] Conext SW4048 not charging from generator 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 ? 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. Ray Walters Remote Solar 303 505-8760 On 12/15/20 1:57 PM, Sindelar Solar wrote: Dave, 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. Allan On 12/15/2020 11:14 AM, Dave Tedeyan wrote: Hi All, 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. 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. 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. Thanks! -Dave Dave Tedeyan, PE Senior Engineer | Taitem Engineering, PC 110 South Albany Street | Ithaca, NY 14850 o. 607.277.1118 x121 f. 607.277.2119 www.taitem.com <http://www.taitem.com> Solar • Sustainability • Energy • Design Certified B-Corporation since 2013 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org <mailto: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 -- Allan Sindelar <mailto:al...@sindelarsolar.com> al...@sindelarsolar.com NABCEP Certified PV Installation Professional New Mexico EE98J Journeyman Electrician Founder (Retired), Positive Energy, Inc. 505 780-2738 cell _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org <mailto: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
_______________________________________________ List sponsored by Redwood Alliance 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
