Seems confusing that the AHJ is requiring a disconnect for AC wiring,
not specific to which or both panel types, and then a dc disconnect with
no code reference. Was trying to convey a reasonable, safe approach. A
lot of bad information from fire department solar consultants making a
lot of m
Bruce
Good morning, just reread your email. For some reason I thought you were
asking about their batteries which have been great and pricing fair. We have
yet to install any of the EG4,6000 or 6500. Know several installers that have
and they are tough little work horses but not to be comp
2020 Code Language:
480.7 DC Disconnect Methods.
(A) Disconnecting Means. A disconnecting means shall be provided for all
ungrounded conductors derived from a stationary battery system with a voltage
over 60 volts dc. A disconnecting means shall be readily accessible and located
within sigh
A dc-rated shunt trip breaker @ 250A (Blue Planet / OB Radian cabinet
breaker) would do the trick if they exist. The trip device could be mounted
outside.
On Fri, Jan 27, 2023 at 3:55 PM William Miller via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:
> Glenn:
>
>
>
> As I wrote, a DC d
Jeremy:
Thanks for posting the code references for those that had never looked them
up.
Chris:
What do you mean by “a disconnect for AC wiring, not specific to which or
both panel types”?
All:
Code references are handy when receiving edicts from building officials,
but not required,
All
One thing that no one is talking about is what happens to the MPPT charge
controllers when the Battery Disconnect trips when the charge controllers
are under full load.
Many will blow up. Try turning off the battery breaker on a SolaArk when
the charge controllers are maxed, and see if you ge
HI William B,
That is a good point. And even beyond the potential CC damage, since your now
potentially powering the inverter it could actually stay alive ( I’ve seen this
happen ) or it can cause a voltage spike from the CC which can damage the
inverter which I”ve also seen.
I don’t know w
Esteemed wrenches:
Well if my house is on fire and the entry of fire responders is delayed for
lack of a disconnect, I choose having the disconnect. I can worry about the
charge controllers later.
Others may prioritize their charge controller over their homes…
Put a cable-tie lock in the closed
It would be nice if the decision was up to the owner / occupant of the
property. I, for one, do not want any random person to be able to turn off
my house or business with the flick of a switch. I feel strongly that there
is far too much fear mongering in NEC with relation to renewable energy.
-Ja
James:
Your on-grid home or business already has a quick and efficient means of
disconnecting power by a random person: If you have a non-CT meter it’s a
matter of clipping the meter tag and pulling the meter. If there is a CT
meter, there will be a switch to flip.
Fortunately off-grid homes do
Every single house I’ve looked at in my town has a breaker panel with a main service disconnect on the outside of the house already. So in many cases we are well beyond worrying about someone “flicking your switch!”In fact, in addition to the emergency disconnect requirement for stationary standby
Brian and William,
With all due respect, I think your geographical location of California may
be limiting in your understanding of the implications of local power
security.
Where I am in Minnesota and where I work in Alaska, loss of power and
backup power can have very expensive consequences. Whe
Easy buddy. First off you are wrong about where I live. And secondly your whining about being cold will win you no sympathy; old folks die in heat waves when the air conditioning fails! And if it such a big deal to you then don’t just complain - get involved in the process, since I’m sure your idea
My design for one customer was to have one initiator for the PV and
inverter, and a separate one for the battery initiator. And, to put up a
plaque giving instructions to turn off the PV and inverter first, then the
battery.
Brad
On Sat, Jan 28, 2023 at 4:22 PM William Miller via RE-wrenches <
re
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