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Co-Founder and Lead Software Engineer Reliable Energy Analytics LLC

Inventor of patent 11,374,961: METHODS FOR VERIFICATION OF SOFTWARE OBJECT AUTHENTICITY AND INTEGRITY and the Software Assurance Guardian™ (SAG ™) Point Man™ (SAG-PM™) software and SAGScore™...

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  • Jul 14, 2021

This article, and its linked materials, offer a glimpse into the future grid, under a FERC Order 2222 regulatory environment. Take note of the reference to Sunrun's capacity commitment for 20 MW in aggregated DER within Massachusetts. Welcome to the future grid.

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Matt Chester's picture
Matt Chester on Jul 14, 2021

As part of the bid, Sunrun said it would deploy distributed solar and battery storage to about 5,000 customers in Massachusetts. It will be required to offer the grid 20 MW of power, 24 hours a day for the one-year period. In return, Sunrun will be paid $3.80/kW/month, representing a $912,000 total contract value. Homeowners who signed up for the program agree to allow their battery to be discharged overnight. In exchange, they receive an upfront cash incentive as either a payment or a reduction in the upfront cost of their system.

Great description of the program-- and neat to think of the natural redundancy that grows as more households buy in. 

I wonder how the rate of adoption of such a program will do compared with more typical residential solar systems. 

Rao Konidena's picture
Rao Konidena on Jul 14, 2021

This Sunrun project in ISO-NE state is exactly the kind of innovation that I am advocating for. Aggregation of DERs offers lot of benefits including deferring the need for a transmission or a distribution line. Notice I used the word "deferred", I am not saying we don't need T lines or D lines. But to keep our costs down, why not try a cheaper solution that is also easier to implement in current market participation models?

I wish state regulators in MISO are paying attention!

Matt Chester's picture
Matt Chester on Jul 14, 2021

Great point on the deferring-- energy demand is growing and that ain't slowing down. But tools like this can buy us time, and think about the new types of digital and modern tools that can be integrated if we have more time before needing to go full bore on the T&D buildout!

Bob Meinetz's picture
Bob Meinetz on Jul 14, 2021

From PV-Magazine's article/advertisement:

"As an example, if peak shaving occurred for demand above 3 kW per house, deploying batteries individually for 20 houses would require 120 kWh of storage."

That depends. If demand reached 9 kW per house for an hour, peak shaving would indeed require 120 kWh of storage. If one neighbor was charging his electric car and was using 13 kW, however, and grid access was limited to 3 kW/house, the lights would go out for everyone two minutes early.

No one would mind if their computer turned off for a couple of minutes because a neighbor was charging his electric car, right?

"By contrast, deploying batteries collectively would only require 7 kWh, the researchers said. Sharing batteries or having one battery per 20 houses would be a less expensive approach to providing these services, they said."

Nonsense. The same battery capacity is required to store 120 kWh whether there are twenty batteries, or one.

The reserarchers are morons.

Jim Stack's picture
Jim Stack on Jul 17, 2021

Great idea getting many homes to all work together. That helps defray the cost and makes the system more resilient. I hope they offer similar programs in Arizona where I am. I'd love to have a Battery Storage option on my Solar that now runs my home and makes more than we need. We need more projects like this. 

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