[RE-wrenches] Conext SW4048 not charging from generator

[Mac Lewis]

Often just adjusting the throttle screw is enough to get these low quality
generators back into the spec that the inverter will accept.  I expect you
will find it well below 60 Hz and 240V (or 120V) when loaded heavily.  Many
people never do any maintenance so don't be surprised if the air-filter is
clogged and the plugs need changed.

As suggested, I'd probably set the AC input to ~50% of rated capacity of
the generator, maybe less.

On Wed, Dec 16, 2020 at 8:03 AM Jerry Shafer <jerrysgarage01 at gmail.com>
wrote:

> Wrenches
> You may have answered you question here, "crappy genny" if the voltage or
> the freq is to far out or just very dirty AC, the inverter will as you
> discribed, keep attempting to connect but due to one of the issues can't
> maintain a connection.
> Jerry
> NABCEP Inspector
>
> On Tue, Dec 15, 2020, 10:37 AM Dave Tedeyan <dtedeyan at taitem.com> 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
>>
>> Solar • Sustainability • Energy • Design
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-- 



Mac Lewis

*"Yo solo sé que no sé nada." -Sócrates*
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