Are you sure its just the transfer switching causing problems? I've seen
quite a bit of lights dimming, flickering, and strangeness with XW
inverters ( and many others) just in normal operation. Certain LEDs are
particularly sensitive, just another appliance coming on can cause
noticeable flicker that bothers some clients. Our solution was to try
different brands of LEDs till we found ones that had less trouble. I
recall the Phillips ones being good, but you would have to test a few to
see.
Ray Walters
Remote Solar
303 505-8760
On 4/21/20 12:26 PM, Jason Szumlanski wrote:
I have not looked into that, but the problem also exists
transferring from inverter to generator. The owner wants "clean" power
all the time, and just keeping him on inverter power all the time
would be a solution.
*
*
On Tue, Apr 21, 2020 at 9:35 AM Tump <t...@swnl.net
<mailto:t...@swnl.net>> wrote:
Have you shortened the transfer time from gen to inv, voltage “cut
out"acceptance of the gen in power instead of their 90Vac to say
110V/L ? Raising the output voltage on the 6848s & gen set for
VD/voltage sag issues under heavy loading? Watch this as sometimes
under heavy loading it will cut the AC input. I use the config
tool to address this kind of issue, gives me a bit more control.
I have a client that has a large external battery charger similar
to a fork truck unit that he alleges causes "dirty power" while
the genset is supplying power to the charger, w/o charging thru
the inverters. Unfortunately w/ the virus I have yet to confirm.
On Apr 21, 2020, at 8:27 AM, Jason Szumlanski
<ja...@floridasolardesigngroup.com
<mailto:ja...@floridasolardesigngroup.com>> wrote:
I actually need 400Adc at 51V nominal of total charge rate. I was
hoping to use 100Adc chargers for redundancy, or some combination
of 2-8 chargers to reach the needed current, assuming they can be
synced up. I don't think the charging algorithm needs to be
complicated. We are basically bulk charging the LiPOs to 80% with
the battery BMS controlling the generator. The concept is to get
to 80% sometime in the night and solar kicks in during the day to
reach 100% using 2-stage charging from the XW charge controllers.
The problem I have is the quad XW6048s in the system run at a
pretty good load typically... often over 50%. This is off-grid
with generator backup. The transfer switches in the XW6048 are
causing surges and brownouts when the switched loads are high,
especially smart dimmers and televisions. I need seamless power
for this client. My thought is to abandon the internal chargers
in the XW6048s and just run loads off inverter power full-time. I
would charge the batteries with external battery chargers. The
tricky part is how to adjust the charge rate based on load, and
also based on solar input. I need to limit the net charging
current. Of course, I still need 400Adc of charging current,
which I'm learning might be hard to find. I don't really want to
buy four more XWs - that's a pretty expensive solution.
Jason Szumlanski
Florida Solar Design Group
On Fri, Apr 17, 2020 at 4:26 PM Dave Angelini Offgrid Solar
<offgridso...@sti.net <mailto:offgridso...@sti.net>> wrote:
I use the CSW 4048. It has a 50 amp charger. A good spare for
clients. Get 2 of them. Repurpose an old Radian or XW well
over 100A. XW+ is 140adc.
*Dave Angelini Offgrid Solar*
*"we go where powerlines don't"
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On Fri, 17 Apr 2020 14:21:14 -0400, Jason Szumlanski
<ja...@floridasolardesigngroup.com
<mailto:ja...@floridasolardesigngroup.com>> wrote:
I'm looking for a standalone 51V nominal battery charger
suitable for a LiPO battery with 2-stage charging and
adjustable setpoints for max current and battery voltage. It
would require dual chargers with 100A capacity (I want dual
chargers for redundancy so I have at least 50% capacity if
one goes bad). Ideally they would sync up so they change
stages simultaneously, but I'm not sure if that's really
important.
Who makes something like that?
Jason Szumlanski
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