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Is there any any recorded case to date of a UL 1741 inverter backfeeding
the grid and causing harm?<br><br>
At 05:27 PM 11/23/2015, you wrote:<br>
<blockquote type=cite class=cite cite="">Gary:<br>
<br>
Here in the North Texas area, for the Oncor TDSP (Transmission and
Distribution Service Provider), an 8-page Interconnection Agreement (IA)
is required before a DG (distributed generation) system can become
grid-interactive.<br><br>
The Oncor IA is a legal agreement signed by the DG system owner and
Oncor. It is very specific about the owner's liabilities and
responsibilities for their DG system.<br><br>
If an IA is required in Ohio between your customer and the serving TDSP,
the customer's liabilities and responsibilities should be described in
that document.<br><br>
Whether or not there is a TDSP IA requirement in Ohio, I suggest that
your customer discuss their liability concerns with their home owner or
business insurance provider. It's possible that additional liability
coverage may be appropriate to protect your customer, or possibly
required by the insurance provider.<br><br>
Regards,<br><br>
Gary Willett PE<br>
Icarus Engineering & Solar Services<br><br>
Here's the liability section excerpt from the Oncor Interconnection
Agreement:<br>
<dl>
<dd><font face="Tahoma" size=2>4. Limitation of Liability and
indemnification</u><br><br>
<dd>4a. Notwithstanding any other provision in this Agreement, with
respect to Company's provision of electric service to Customer, Company's
liability to Customer shall be limited as set forth in Section 4.2.1 of
Company's PUC-approved tariffs and terms and conditions for electric
service which is incorporated herein by reference.<br><br>
<dd>4b. Neither Company nor Customer shall be liable to the other for
damages for any act that is beyond such party's control, including any
event that is a result of an act of God, labor disturbance, act of the
public enemy, war, insurrection, riot, fire, storm or flood, explosion,
breakage or accident to machinery or equipment, a curtailment, order, or
regulation or restriction imposed by governmental, military, or lawfully
established civilian authorities, or by the making of necessary repairs
upon the property or equipment of either party. <br><br>
<dd>4c. Notwithstanding Paragraph 4.b of this Agreement, Company shall
assume a/I liability for and shall indemnify Customer for any claims,
losses, costs, and expenses of any kind or character to the extent that
they result from Company's negligence in connection with the design,
construction, or operation of its facilities as described on Exhibit A;
provided, however, that Company shall have no obligation to indemnify
Customer for claims brought by claimants who cannot recover directly from
Company. Such indemnity shall include, but is not limited to, financial
responsibility for: (a) Customer's monetary losses; (b) reasonable costs
and expenses of defending an action or claim made by a third person; (c)
damages related to the death or injury of a third person; (d) damages to
the property of Customer; (e) damages to the property of a third person;
(f) damages for the disruption of the business of a third person. In no
event shall Company be liable for consequential, special, incidental or
punitive damages, including, without limitation, loss of profits, loss of
revenue, or loss of production. The Company does not assume liability for
any costs for damages arising from the disruption of the business of the
Customer or for the Customer's costs and expenses of prosecuting or
defending an action or claim against the Company. This paragraph does not
create a liability on the part of the Company to the Customer or a third
person, but requires indemnification where such liability exists. The
limitations of liability provided in this paragraph do not apply in cases
of gross negligence or intentional wrongdoing.<br><br>
<dd>4d. Notwithstanding Paragraph 4.b of this Agreement, Customer shall
assume all liability for and shall indemnify Company for any claims,
losses, costs, and expenses of any kind or character to the extent that
they result from Customer's negligence in connection with the design,
construction or operation of its facilities as described on Exhibit A;
provided, however, that Customer shall have no obligation to indemnify
Company for claims brought by claimants who cannot recover directly from
Customer. Such indemnity shall include, but is not limited to, financial
responsibility for: (a) Company's monetary losses; (b) reasonable costs
and expenses of defending an action or claim made by a third person; (c)
damages related to the death or injury of a third person; (d) damages to
the property of Company; (e) damages to the property of a third person;
(f) damages for the disruption of the business of a third person. In no
event shall Customer be liable for consequential, special, incidental or
punitive damages, including, without limitation, loss of profits, loss of
revenue, or loss of production. The Customer does not assume liability
for any costs for damages arising from the disruption of the business of
the Company or for the Company's costs and expenses of prosecuting or
defending an action or claim against the Customer. This paragraph does
not create a liability on the part of the Customer to the Company or a
third person, but requires indemnification where such liability exists.
The limitations of liability provided in this paragraph do not apply in
cases of gross negligence or intentional wrongdoing.<br><br>
<dd>4e. Company and Customer shall each be responsible for the safe
installation, maintenance, repair and condition of their respective lines
and appurtenances on their respective sides of the point of delivery. The
Company does not assume any duty of inspecting the Customer's lines,
wires, switches, or other equipment and will not be responsible
therefore. Customer assumes all responsibility for the electric service
supplied hereunder and the facilities used in connection therewith at or
beyond the point of delivery, the point of delivery being the point where
the electric energy first leaves the wire or facilities provided and
owned by Company and enters the wire or facilities provided by
Customer.</font><font face="Tahoma"><br>
</i></font><br>
</dl><br>
On 11/22/15 3:19 PM, gary easton wrote:<br>
<blockquote type=cite class=cite cite="">Hello Wrenches, <br>
I have an electrical engineer customer that asked me a "what
if" that I had not heard before. If an inverter somehow back feeds
the grid during an outage and damages something or hurts someone who is
liable? <br><br>
-- <br>
Gary Easton<br>
Appalachian Renewable Power <br>
Stewart, Ohio 45778<br>
NABCEP Certified Solar
PV
<br>
T: <a href="??">740-277-8498</a> <br>
<a href="http://www.arp-solar.com">www.arp-solar.com</a><br><br>
<br>
<h1><b>“First they ignore you. Then they laugh at you. Then they fight
you. Then you win.”</b></h1><br><br>
~Ghandi<br><br>
<br><br>
<br>
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