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Participant

Join Date: Mar 2017
Posts: 3

Reverse Power Relay (RPR) for 15 kW solar PV

03/16/2017 2:52 PM

PSEG in New Jersey requires zero energy export to their network from solar PV system. So, we need to install a auto-reset RPR to cut-off wire leading to solar inverter (rating 42 Amps) when there is net energy export. Could anyone recommend suitable products?

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#1

Re: Reverse Power Relay (RPR) for 15 kW solar PV

03/16/2017 4:49 PM

"...New Jersey requires zero energy export to their network from solar PV system..." Really? Can you please provide a reference in the NJAC (New Jersey Administrative Code) 14:8-4 and 5 that backs this claim.

From the NJ BPU (Board of Public Utilities) website:

"...Net metering helps customers maximize their renewable energy investments. It enables customers to obtain full retail credits on their utility bill for each kWh of electricity their system produces up to 100% of their electricity usage over the course of a year..."

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Participant

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#3
In reply to #1

Re: Reverse Power Relay (RPR) for 15 kW solar PV

03/16/2017 6:14 PM

Yes, only in certain area where spot network or area network were used to service loads.

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#4
In reply to #3

Re: Reverse Power Relay (RPR) for 15 kW solar PV

03/16/2017 7:10 PM

"PSEG Solar Source is not the same company as PSE&G and is not regulated by the New Jersey Board of Public Utilities. It develops utility scale solar projects outside of PSE&G's service territory."

A little confusing....In any case you're saying you're not allowed to feed the grid with your solar system, but are allowed to furnish your own power, and you want to disconnect when producing more than you are consuming....automatically...

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Guru
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#6
In reply to #3

Re: Reverse Power Relay (RPR) for 15 kW solar PV

03/17/2017 10:16 PM

Again, please provide a reference for your statement regarding PSEG not allowing you to supply power to their grid.

The RPR is a separate requirement to ensure that your system does not energize the utility side of your meter in the event that the power is down on the external lines feeding you. This is a safety feature for the linemen working on your lines and is not intended to prevent you from exporting your power under normal operating conditions.

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#2

Re: Reverse Power Relay (RPR) for 15 kW solar PV

03/16/2017 5:14 PM

"PSEG, NJ's Largest Electricity Provider, is Among the Nation's Leading Solar Developers

The company's regulated electric and gas utility, PSE&G, was recognized by the Solar Electric Power Association as one of the nation’s top ten solar-connected utilities. Through its nationally recognized Solar 4 All™ program, PSE&G is pursuing a two-track approach to developing 125 megawatts of grid connected solar by:

  • Developing large-scale centralized projects including solar farms - several on brownfields and landfills - and rooftop solar systems
  • Building the world's first and largest pole attached solar project

In addition, PSEG Solar Source develops, constructs, owns and operates large-scale solar facilities outside of PSE&G's electric service territory. It currently has 15 solar facilities in operation totaling 215 megawatts, with five projects under construction that total 135 megawatts.

View details the solar projects that PSEG has placed in service as well as those in development from the links below:

* Public Service Electric and Gas Company (PSE&G) is New Jersey's oldest and largest regulated gas and electric delivery utility. Its Solar-4-All program was approved by the New Jersey Board of Public Utilities.

** PSEG Solar Source is not the same company as PSE&G and is not regulated by the New Jersey Board of Public Utilities. It develops utility scale solar projects outside of PSE&G's service territory. "

https://www.pseg.com/info/media/solar/index.jsp

If you're talking about using your solar source when the grid is down....then here is a system

http://insideevs.com/getting-grid-tied-solar-array-work-grid/

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#5

Re: Reverse Power Relay (RPR) for 15 kW solar PV

03/17/2017 10:51 AM

Could not just dummy load your excess, or charge up battery banks for later? This apparently is not a big solar array.

What you probably are referring to is back feed to grid when local grid is out of service, so as not to harm utility workers.

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