Hi Marco,
I partially agree with you. I recently bid Outback, StorEdge, and Pika options
for a GTBB customer, partly to understand pricing for myself, and found OB to
be so much more expensive. The customer really wanted a system that would be to
be able to charge the batteries off a generator
William and all,
While I too have avoided Trojan in recent years due to multiple reports
of poor performance on this list, I want to note that in my experience,
battery distributor experience will vary according to the individual
branch. My local Albuquerque distributor is very good - prompt
Bill
Stack up the panels to 3 to get voltages less then 150 VOC Never to Exceed
with a FX 60 or 80 charge Controller and sure you can charge a 48 volt
system 2 panels may work but high temps might hamstring your output.
Jerry
On Tue, Sep 11, 2018, 3:04 PM Bill Battagin wrote:
> I've been on
Bill and all,
To elaborate a bit on Ray's accurate suggestion with a bit of history...
in the early days the general consensus developed that for general use,
36 cells (given that one cell produces just shy of 1/2 volt, regardless
of cell size) was the standard cell count for battery
Ken
AC Coupling is always do-able, might not be the best solution but it can
work well if set up right, you can use DC contactor to shut down strings or
AC to kill the inverter, DC will respond faster. Use an Outback Radian(s)
and Blue Ion Batteries for a sweet easy solution. I've used outback for
Diversion load controller and diversion loads will work every time, no
matter what the equipment.
Dan Fink
Professor of Solar Energy Technology, Ecotech Institute
IREC Certified Instructor™ for:
~ PV Installation Professional
~ Small Wind Installer
Executive Director, Buckville Energy
NABCEP
Looks like standard AC coupling.
We typically just redo the whole system rather than retro fit. Depending on the
system size, it's usually not that much more work (racking is already up) and
the end result is always a regulated charge to the batteries.
It would be great if someone would come
Aloha all,
At the risk of whacking at a hornet’s nest…lower voltage DC is s 80s and
90s especially when it comes to grid-tie applications with battery storage.
The time of OutBack and Schneider and all the others doing 48VDC is drawing to
close. Enough already. Thank you for your
Ken
We have had terrific success with AC Coupling. Yes there are some differences
from Dc Coupled systems but if built properly, customer is willing to learn how
to use it and maintain it and you put the correct relays in to shut off the
string inverters if battery voltage gets to high,
I didn't watch the whole thing, but it looked like a standard AC couple
set up with an Outback Radian. My understanding is that Outback no
longer supports AC Coupling, BTW. I would never use that for an off
grid system or for longer outages. In a very brief explanation, it
essentially
https://www.youtube.com/watch?v=eyhkIfS5Z-Q
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I'm not sure on that particular device, but SCI equipment usually have
test points, that you measure with a volt meter: positive to test point,
negative to the negative battery input. The readings reflect cell
voltage, so you need to figure the voltage set points you want, and
divide by 36
Hi all,
I am servicing a system that has a 72 volt charge controller circuit board
made by solar converters in Canada. I believe they are no longer in the
business. The float and bulk settings are messed up and they are set with
two variable resistor pots. Can anyone tell me how I can set
Friends:
I used to buy Trojans. My vendor told me about 3 years ago that Trojan had been
acquired and the chemistry in the plates had changed. Later they denied making
that statement.
I had a set of L16s vastly underperform. Trojan suggest a bulk/absorption
voltage higher than any other
Unfortunately I'm seeing premature failures of the 2 v models even
more. You have paralleled cells in each battery, and it can be
difficult to even identify the failures. I found the infared camera to
be invaluable, as you can see the shorted cell clearly in a thermal image.
Ray Walters
A 2nd option: A pair of 72 cell modules should be enough.
Ray Walters
Remote Solar
303 505-8760
On 9/12/18 9:21 AM, Mac Lewis wrote:
Hi Bill,
I agree with Allen. We get similar peak temps here and two 60 cell
modules doesn't charge a 48V battery bank adequately. This effect
would become
Bill,
What is the full charge voltage of your L-ion pack. The one I am using need
56 VDC. Next look at the module data sheet and see % or actual drop in peak
power voltage per degree C. The modules will be about 60 degrees C which is
40 degrees higher that where they are rated.
My guess is that if
I agree with the comments that followed on this
thread, and would also like to add that Trojan
L-16 batteries have a high rate of premature
failure. Possibly the 2 V cells are better, but
the 6 V cells seem very prone to dying early.
Trojan batteries were robust in past decades, but
seem
Hi Bill,
I agree with Allen. We get similar peak temps here and two 60 cell modules
doesn't charge a 48V battery bank adequately. This effect would become
worse over time with voltage degradation. I try to be at least 15% above
highest expected battery voltage with Vmp of the strings. With 150V
I have to agree that the voltage is pretty aggressive for that system.
With, absob timers they are typically based on how much current is going
into the battery bank when in Bulk.
The inverter current realistically would be around 130 to 140 amps... at
that rate 3.5 to 5 hours at the most...
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