How long has this system been operational?
Jay
Peltz power
> On Dec 16, 2014, at 6:27 PM, Corey Shalanski
> wrote:
>
> Wrenches,
>
> I visited a customer today whose grid-tied battery backup system suffered
> some sort of catastrophic failure, and now I'm trying to play detective to
> fi
Wrenches,
I visited a customer today whose grid-tied battery backup system suffered
some sort of catastrophic failure, and now I'm trying to play detective to
figure out what happened and whose equipment/design is to blame.
Here is what I know so far:
- System is ac-coupled with a Sunny Boy 7000
Jarmo, you are absolutely correct. This is another great reason NOT to
use an MPPT charge controller
as an AC sourced battery charger. Also, if my instructions are not
followed to a TEE, the CC WILL blow up !
The input capacitors are going to wear out MUCH sooner than a real
charger beca
Jarmo, you are absolutely correct. This is another great reason NOT to
use an MPPT charge controller
as an AC sourced battery charger. Also, if my instructions are not
followed to a TEE, the CC WILL blow up !
The input capacitors are going to wear out MUCH sooner than a real
charger beca
Thanks for the observation. I forgot it will rectify to the peak voltage.
Kirk Herander
VT Solar, LLC
Proven PV provider since 1991
www.vermontsolarnow.com
dba Vermont Solar Engineering
NABCEPTM Inaugural Certificant
VT RE Incentive Program Partner
802.863.1202
From: RE-wrenches [
Hi:
I'm enjoying learning many new ways of looking at things and of practical
solutions on this forum. In that spirit, the only thing I would add to
this discussion is that the power factor as seen by the AC source will be
very poor. In that regard, the larger the caps, the more stable the "D
Larry, Pitfalls ?
The biggest pitfall I would say is if you have a VERY stiff grid.
If your Voc is say, 170V DC and the CC current limits it output at say,
169 V DC,
they you are going to need to add an input power resistor of a couple
Ohms to
help cushion the input to be more like a PV module
If memory serves me correctly and this is the off grid Generac they are
available as a 120 volt and it takes a new breaker and rewiring to get 120 /
240 out of them
I run into this in the past they actually had it wired for 240 into a balancing
transformer to feed 120 into the inverter
We coul
Hi Mac,
Jay just had the same issue and it was 120v from the gen instead of 120/240.
The inverter was charging using half the windings causing it to Overtemp.
Check the 60A breakers on the side of the inverter. Also make sure to remove
the wires from the input terminal block before measuring vol
Howard,
A wye connection is BY DEFINITION grounded through the fourth wire. The wires
leaving that bar can be either grounded conductors (neutrals) colored white or
equipment grounding conductors, bare or green. Because you measure 277 V between
each line and ground, it would seem that you do have
Jarmo is correct in that 480 and 277 are right for 480 WYE.The alternative is Delta which will have different Phase-Neutral voltages, with a hi leg from one phase. But this is never (to my knowledge) done with 480, only 240. See http://en.wikipedia.org/wiki/Three-phase_electric_powerhttp://en.wiki
I must have missed the prior discussion about using PV CC. The concept
sounds good but how many of you have done this and are there any
pitfalls to be aware of? If I use a 20 amp bridge I should be able to
produce 80 amps @ 14.4V. For continuous operation, will I need a large
heat sink on it?
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