Another $.02....
I have 2, FX3524's and 35 KWhrs of HUP's behind them....just cleaned
and torqued the terminals/cables. I run 6-7 brands, sizes, styles of LEDS and
some of them of them flicker while, in my case, the convection oven is running.
It quickly pulses (~10-20 times/second) to maintain a temperature. Fridge is
DC. The less expensive off-brand LEDs flicker, the big name brands don't.
Bill
----- Original Message -----
From: Jerry Shafer
To: RE-wrenches
Sent: Monday, January 06, 2014 6:21 PM
Subject: Re: [RE-wrenches] Flickering LED lights on and Outback Dual 7248VFX
system
I have had this same thing happen with a off grid application using SMA SI's
it rooted back to programming one inverter was going to sleep and under some
loads the lights would flicker and they were over the dinning room table and
suspended from a 16 foot ceiling so it lit up the entire room. I know this has
a different inverter system but I would look close at the programming LED's
use such a low load and the drivers take a second to activate. Did you connect
a DVOM and watch the volts better yet a scope
Jerry
On Mon, Jan 6, 2014 at 5:56 PM, Exeltech <[email protected]> wrote:
There may also be a technical aspect of the dimmer that's adding to the
flicker, depending on the type of dimmer(s) in use.
Some dimmers use a device called a "silicon-controlled rectifier" .. or
"SCR". They allow only half of the sine wave to pass. Half-wave power wasn't
very noticeable when used with incandescent lamps due to the continued "glow"
persistence of the filament. However, LEDs react [essentially] immediately,
and the flicker is very apparent. Final thought .. compressors use the most
energy during the compression stroke. Actual current draw varies with each
stroke of the piston. Check not only the battery connections, but look to see
if the loads are on the same circuits as the lamps. If in fact the inverter AC
output voltage IS dropping due to DC-side issues .. and the large AC loads
happen to share the same circuit as the lamps .. this would make any flicker
that much worse.
Dan
--------------------------------------------
On Mon, 1/6/14, [email protected] <[email protected]> wrote:
Subject: Re: [RE-wrenches] Flickering LED lights on and Outback Dual 7248
VFX system
To: "RE-wrenches" <[email protected]>
Date: Monday, January 6, 2014, 6:25 PM
Only during Big load surges ?
Could it be current limiting and because LEDs are so fast on and off, you
notice the drop in momentary voltage ?
Any inverter might do that under the right conditions.
Just a thought.
boB
On 1/6/2014 3:45 PM, Dan Fink wrote:
> I consider LED flicker as very common when a fridge starts up, but NOT
while it's running. Both dimmed and not dimmed LEDs. I see flicker more often
on systems with smaller (or aging) battery systems of course. The only
particular appliance I have found causing constant flicker here and with my
clients is a particular brand of laser printer. And also a subwoofer on the
stereo (light show!)....a different subwoofer brand solved that problem. Go
figure, I have no idea why. Most of my inverters are by Magnum. I have not
found much difference with LED brands or dimmer brands.
> I can see how this could be a problem for your client, Kirpal. None of
mine seem to mind a startup flicker, but if its constant that's a big problem.
I wish I had an answer for you, but I hope that providing this information
helps others. CFLs do not give me the same problem, but of course have their
own other problems.
>
> Dan Fink,
> Executive Director;
> Otherpower
> Buckville Energy Consulting
> Buckville Publications LLC
> NABCEP / IREC accredited Continuing Education Providers
> 970.672.4342
>
>
>
>
> On Mon, Jan 6, 2014 at 2:48 PM, Jay Peltz <[email protected]> wrote:
>
> Dimmers are super specific to light brand/type. You'll have to do
the research
>
> For now swapping to regular switches should work
>
> Jay
>
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Change email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
------------------------------------------------------------------------------
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Change email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Change email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
