William and all,
Our larger UL-certified inverter systems at Exeltech are routinely
built with multiple individual breakers with the handles pinned
together to create a higher-amperage device. To William's point,
and by way of example, it's common for us to have three 100-amp
breakers ganged
Larry
I hope you went ahead as planned.
I have magnum 1500w inverter on my work truck. I paralleled 3 each of 60a
breakers. I did not use parallel cables but installed a four finger MidNite bus
bar on the bottom (allowing the addition of a 15A Charge Controller breaker)
and a 3 finger bus
Thanks Allen for clarifying why a 60A is required. I was wondering. The
spec does list a surge current of 9000W so I thought that may be the
rationale, but even that would only require a 50A, and since this surge
occurs during 'stand-alone mode' it didn't seem to apply to the OCPD at the
main
Garrison,
I don't know why it's not listed as 60A max, but my own internal
logic would ask why it should be. The only benefit I could see for
using smaller than a 60A breaker would be to allow use of #8
conductors (allowed with a 40A or 50A breaker) instead of
Yes I did. What a wonderful resource this list is to the world of Wrenches
everywhere.
Thank to all,
Larry Crutcher
Starlight Solar Power Systems
On Feb 28, 2013, at 6:10 AM, Maverick Brown wrote:
Larry
I hope you went ahead as planned.
I have magnum 1500w inverter on my work truck. I
Allen,
The benefit I see would be to allow for a code compliant load side
connection on a 200A panel with a 200A MB, where the AHJ is on the 2008 NEC
or older and will not listen to your good logic. I don't think this would
always be the best option, but if backup loads and inverter output
As a note, supply side connections have an extra complication with
battery backup systems. With a regular GT inverter you're just pushing
current into that interconnection point and you can work out easily that
you won't have any overcurrent issues unless you made a big mistake and
your
Great point Dave. It crossed my mind that it was technically possible, but
figured since I would be removing loads off the main panel it was highly
unlikely. Thanks for the code reference. I'll go load side, and be
prepared for some discussion.
Thanks,
Garrison
From:
Garrison, et al:
Another consideration when sizing the POCC OCPD (either load side or supply
side) is charging current when the grid power returns and the battery bank is
near the LBCO voltage.
Bulk charging current and AC pass-through current both must be considered
when sizing the POCC
Wrenches,
I had a prospect send me PV Watts data for his future off grid home. Of course
we use PV Watts for GT systems all the time, but I have yet to use it for Off
Grid system design. We use an old Dankoff Solar tool that has worked for
years
Any thoughts on using PV Watts as a basis
Hi Jeremy;
PV Watts works fine for off-grid. We generally use a 30-35% de-rate factor.
But in reality with uswe are all locked in on different 'tiers' of
systems..with L-16 or T-105 battery banks, you get locked in by
having to add batteries in sets of 8 (or sometimes 4, only rarely 2).
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