generally on the elteks if you do not enable the charge limit and you get a decent outage the LVD breaker will pop when the power is restored because the rectifiers can push a bunch of power to the batts and trip the breaker, imho
On Mon, Mar 16, 2020 at 3:50 PM Ken Hohhof <[email protected]> wrote: > You may be correct (although the previous batteries lasted 7+ years). I > thought maybe the Eltek system was doing an equalization charge, but it > seem there is a "boost" charge that can be manual or automatic but both > were disabled. However there is a battery current limit which was not > enabled. I'm not sure if the 10A setting was automatically filled in based > on the 33 Ah size of the string, but that would be 0.3C so probably about > right. I think on the battery case it says "initial current <9.9A". In > Zeus spec sheets I see 0.3C in one place and 0.25C in another. > > So maybe I should check the enable box. > > However, the system only has 2 rectifier modules plugged in, 250W each, so > it shouldn't be capable of more than 10 amps anyway. That's the other > possible explanation of why the default seems to be 10A, maybe the Eltek > software knows that's the max available. And with the loads drawing almost > 100W, the batteries shouldn't have been overcharged. > > Is 0.3C or 0.25C still too aggressive? Should I enable the battery > current limiting and set it to something lower like 5A? > > > -----Original Message----- > From: AF <[email protected]> On Behalf Of Seth Mattinen > Sent: Monday, March 16, 2020 11:13 AM > To: [email protected] > Subject: Re: [AFMUG] AGM battery question - noise while charging? > > On 3/15/20 7:45 PM, Ken Hohhof wrote: > > Is it normal, or problematic, to replace AGM batteries and when you > > connect the new ones to the charger (in this case an Eltek rectifier) > > they make noise? > > > > Like a faint bubbling sound inside? It's possible they have always > > done this and I've never heard it in the past because my ear wasn't > > within a foot of the batteries. > > > > > Too much charge current perhaps. You could try lowering it. The controller > should have a way to limit current. If there isn't a current monitor on the > battery leg set the controller's current limit to your normal load + > whatever the battery datasheet says the maximum charge current should be. > Of course then you will have to make sure to adjust this if you add/remove > equipment. > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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