HI Walt,
Have you looked into the IBE industrial battery chargers?
They will be large enough and robust enough to handle the charging.
I'm not sure if they are the best for constant charging however. But
maybe that isn't a large problem given the condition of the electric
grid?
Jay
Peltz power
On Sep 30, 2008, at 7:57 AM, Walt Ratterman wrote:
Hello all,
We have an application in Haiti (and some African countries as well)
where we have inverter /battery systems on a lousy (very lousy)
grids. The grid is good enough to charge batteries, but not
sufficient for sensitive electronic loads.
Therefore, the systems we are using are three Outback FX 3648
inverters. If they are connected with AC IN from the grid and the
grid is on and is lousy (but good enough to get through the voltage
and frequency limits), then this power will be passed on to the
computers. (The reality is that we have to open the voltage window
too wide to let the grid in at all, and thus unacceptable to the
electronics.) So, we DO NOT connect the AC IN to the inverters. In
other words, the FX units become inverters only, and never pass AC
current from the grid to the loads. (This is what we are calling
“no contact” system – similar to a double conversion UPS
system.)
So – we need to add separate battery charging to the battery bank
that will put in roughly equal amphours to what we feel the daily
usage will be during the day.
The load is about 8000 watts, which might translate to 140 to 170
amps of discharging. We might not have to put in the full amount of
charge, since our charging can continue in the night hours when the
load is not discharging, but we should probably try to charge the
batteries at around 100 to 140 Amps DC (48V).
Does anyone have a recommendation as to the type of charger that
might work best for this, either bulk, or smart, or a combination?
OR……other suggestions for this system that I am just missing??
We would plan to monitor this system by using the FlexNET DC system,
adding a DC shunt on the negatives of the feed going from the
charger TO the batteries.
Thanks,
Walt
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪ Skype Walt-Mobile
[EMAIL PROTECTED] ▪ www.SunEPI.org
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