A Solar Energy
Revolution for Washington DC
Guest post by Don Wharton
[Oct. 2017--This year's record breaking hurricane season is a dramatic illustration of the effect of high ocean water temperatures. The total destruction of the Puerto Rican power grid may be an opportunity to make a significant conversion to solar power. More on this at the end of this guest post.]
By conducting business as usual,
we are unlikely to stabilize global warming below the two degrees
centigrade required to prevent a dramatic global catastrophe. If this limit is exceeded, the Greenland ice mass will eventually melt raising ocean levels over twenty feet. Ocean acidity
would increase to the point that jellyfish may replace many if not
most of the fish species of our oceans. Fully half of
existing species could face extinction if we exceed a tipping point
of no return. The last IPCC report noted significant risk to global agriculture that feeds humanity. More carbon is
encapsulated in Arctic permafrost and in ocean methane hydrates than all carbon fuels burned to date. A recent article in Science Advances, based on 17 major climate models, is predicting a mega drought for the US southwest and central plains. The projected drought would be much worse than the current drought in California and the Dust Bowl of the 1930's. It is simply not an
option to allow this carbon from business as usual or Arctic sources to be added to our atmosphere.
Washington DC can spark a major impact by making this city an example of
success for the world. Many people are afraid that increased energy costs will be needed to stop the worst effects of global warming. We in DC could show that renewable energy solutions cost less than business as usual. If we can do this it becomes obvious it is an absurd
waste of our resources to not go with renewable energy. Achieving
such a price point would enlist natural market mechanisms
to prevent an ecological disaster. It would also magnify economic
activity in a way that can provide jobs, profits, and increased returns
for governmental coffers.
This policy document will review the cost goals, mechanisms to achieve them, and the benefits of embracing the revolutionary change that has already been demonstrated by policies elsewhere. DC is the capital of the most important country in the world. It is the logical place to synthesize best solar energy policy in a way that proves what is possible with the best governmental vision.
This policy document will review the cost goals, mechanisms to achieve them, and the benefits of embracing the revolutionary change that has already been demonstrated by policies elsewhere. DC is the capital of the most important country in the world. It is the logical place to synthesize best solar energy policy in a way that proves what is possible with the best governmental vision.
Cost Goals
By mid 2012
German rooftop solar energy cost had declined to $2.55 per peak watt on
average for all roof top systems of less than 100 KW capacity. By December
2014 there was an additional decline to $1.43 per peak watt. This
was doubly impressive since the decline in solar module prices was
relatively modest in this interval. Most of the decline was in the
“soft costs” of installation, customer acquisition, overhead,
permitting, etc.
German installers are immensely experienced. The best are well known. The costs of acquiring customers are very low since most people know a number of people who have had systems installed. Word of mouth becomes very efficient with large scale adoption of solar. The average American costs are 2.5 to 3 times current German costs largely due to differences in soft costs.
German installers are immensely experienced. The best are well known. The costs of acquiring customers are very low since most people know a number of people who have had systems installed. Word of mouth becomes very efficient with large scale adoption of solar. The average American costs are 2.5 to 3 times current German costs largely due to differences in soft costs.
The German experience
was accumulated at the price of very costly feed in tariffs (FIT).
Early adopters got long term contracts promising that they would be
paid $.70 per kwh. In contrast recent (late 2014) DC electric cost has been less than $.10 per kwh. This incentive worked to create great economies
of scale. A cost effective vision for DC would need to deliver the
same efficiency without the long term cost commitments made in
Germany. If that could be achieved virtually everyone in the United
States with even moderate sun would find solar energy to be less
costly than the grid based power they are now using. Policy changes in the following
areas should facilitate this cost effective mass
movement to solar:
Permitting and
Inspection
Utility interconnection
Mass customer
acquisition
Financing
Installation
Large Scale Issues
Permitting and
Inspection
Government services are
often costly. However, that need not be the
case. Permitting fees are often a very profitable revenue source. If we are to maximize solar energy use, permitting
should be a very minor or even near zero addition to the time, energy
and costs of solar system installation. The German model across that
nation is a simple on-line form that takes an hour or two at most
to fill in. In Australia permits are only required if a building is
zoned as “heritage preservation.” The American Department of
Energy has their Sunshot Initiative that seeks an average total US
installed cost of $1.50 per peak watt on residential roofs and $1.25
for commercial roofs. The DOE specifies the streamlining and
reduction of permitting and inspection costs as a significant
requirement to reach this goal.
Bonded contractors can be required to pass a high level of certification
backed with mandatory legal guarantees to correct anything that
violates code requirements. Such a policy may be adequate to meet
the quality requirements now met by DC's current detailed
governmental permitting and inspection process. If that is not
adequate it is imperative that waiting in line, clerical
interaction, and total time required be eliminated wherever possible.
For example, Chicago has implemented a Chicago Solar Express project guaranteeing 24 hour turnaround on permits and a 25% reduction in
billed costs.
Utility Interconnection
Solar systems
installers are often frustrated with the quality of service, timing
and costs of interconnection with the current PEPCO utility. In
Germany there is excellent cooperation between utilities and solar installers. Installations in Germany can often be accomplished
in a single week with two weeks as an unusual outside time frame.
Quick installation is seen as an obvious goal that is widely
supported everywhere in German society. This reduces the management
overhead costs required to track a larger number of outstanding
projects. Management attention is focused on efficient
completion of the smaller number of current projects.
If our society is to copy the German example, government will need to
communicate the values that create that success. This
means a short and reliable time frame for utility
interconnection. Achieving the desired success of distributed solar, requires real reporting
requirements and sufficient financial incentives. Many jurisdictions around the
world require the utility to assume the interconnect cost.
This relatively modest cost can be passed on to all
ratepayers without increasing the cost per kwh significantly. Power consumption has always been highly distributed. Utilities understand their mission of providing access to all consumers. A solar energy future mandates that a widely distributed network of energy producers also be a central mission of our electric power utility.
Mass customer
acquisition
Government should serve the common interest in areas where it can function more efficiently than the private
sector. State level markets under the Affordable Health Care Act, with with their explicit standards
and efficiencies derived from million of customers, illustrate this principle.
Customer acquisition is extremely costly and inefficient for solar
system installers. Only 10 to 20% of cost estimates delivered to
prospective buyers result in signed contracts. This implies
that between 80 and 90% of site evaluation, engineering,
and proposal preparation is wasted effort. These costs then must be
recovered from those who do sign contracts. If a government market
platform can deliver pre-sold customers then this inefficiency
ceases. The DC government has greater power to integrate many complexities into a single transaction which simplifies things
for the customer and can eliminate most marketing costs for the
provider.
LiDAR techology (Light Detection and Ranging) can be used to create 3D models
of all structures and foliage in an area. Many jurisdictions have
used it to create tools to estimate solar energy potential.
DC Department of the Environment (DDOE) working with Mapdwell
has done that for DC. This provides data for
selecting the most promising customers and for generating proposed contracts
based on a "not to exceed" price point.
Currently, given
neighborhoods in DC create group buys which are then submitted for
bidding. A city wide bidding process creates greater
economies of scale and would enable a continuing market process to
serve all neighborhoods. If DC continues to rely on ad-hoc group
buys then the lower price points of the bidding process will continue
to be available only to specific DC neighborhoods for limited
periods of time. DC needs a dynamic process that solicits customers across the city and offers them the current best price for that month through a group bidding process. The goal would be to emulate the rapidly declining cost points of recent German experience.
Mapdwell had a $4.32 per peak
watt projection for a sample DC system. That is a little over three
times the December 2014 costs for German systems and is well above actual DC contracts at the end of 2014. Neighborhood DC group buys are closer to $3 per peak watt.
Mapdwell projects solar modules with 16% efficiency. DC can specify 18% efficiency as a minimum standard without risking any significant increase in cost per peak watt. An important quality in the solar module industry is bankability. This means the supplier is a high quality manufacturer with the excellent financial strength required to reliably support long term warranties.
Mapdwell projects solar modules with 16% efficiency. DC can specify 18% efficiency as a minimum standard without risking any significant increase in cost per peak watt. An important quality in the solar module industry is bankability. This means the supplier is a high quality manufacturer with the excellent financial strength required to reliably support long term warranties.
Financing
Local governments have
several advantages over profit making financial institutions.
Property related investments, such as solar energy, can be recovered through the real estate tax mechanism. This is called Property Assessed
Clean Energy or PACE for short. DC with its AAA bond rating can
access money at the lowest long term rates. DC can directly fund the
purchase of solar systems and recover the costs at a profit using the
real estate tax bill. DC can set recovery rates to generate
guaranteed direct profit to DC. The actual rate can be
less than required by a bank reporting to shareholders. In addition any funds repaid as part of the real estate tax might be deductible from
federal taxes.
There are complexities
in the PACE mechanism that must be addressed because of a criterion set
forth by the Federal Housing Finance Agency (FHFA). FHFA feared
creation of a claim senior to the first mortgage holder in the event
of default. Preliminary evidence shows the arguments
against PACE are not factually supported. The default rate for
energy efficient homes is lower than for other homes. The added
value of solar panels and efficiency upgrades are reflected in their
market prices. The lower energy costs are a valuable positive that both
reduce the prospect of default and add value that is at least equal
to the investment. However, FHFA has placed restrictions on Fanny Mae and Freddy Mac compliant mortgages that need to
be addressed in any policy.
One solution is to make
PACE related loans junior in default claims to the mortgages
covered by FHFA policy. Vermont, Oklahoma, Maine and Rhode Island
have taken this approach, as does a $230 million PACE program in Miami. Commercial properties and residential
properties with no first mortgages or non FHFA confirming mortgages
do not require this legal option. There is some modest increase in
risk to the government where this junior status is allowed. This
can be addressed by requiring more substantial equity above the
first mortgage to get the best loan interest rates, and a very modest increase in rates to
compensate for risk if there is less equity above the first
mortgage. Energy related loans can be senior to home equity lines of credit and secondary mortgages
since they are not traded by Fanny Mae and Freddy Mac. Another approach to PACE loans used in
California creates a fund which guarantees payment of PACE related
obligations in the event of default. This avoids FHFA related
risk in the absence of specific clauses that may exist in a first
mortgage agreement and is working for 160 California localities,
but is not the policy supported in this article. FHFA dislikes this
arrangement and may take future action against it. It is
mentioned here just to illustrate again that FHFA regulation is not
preventing PACE funding.
The major competition
to private ownership of solar systems are the various leasing
arrangements that promise lower energy costs to the home or building
owner. While such arrangements work after a fashion they have not
provided the intensity of support for solar required to achieve the German success level. However, in order to compete with these
leasing arrangements the government must provide comparable
simplicity to the homeowner while taking advantage of all
financial options. This means the sale of
SRECS and provisions to reduce capital cost from Federal and DC
related credits should be part of a single
financial instrument. This would emulate the simplicity of leasing
arrangements while delivering greater benefit to DC residents and the
DC government.
It should be noted that
the DC Sustainable Energy Utility (DCSEU), which encourages home
energy efficiency upgrades, could use the above PACE mechanism to finance home upgrades more cost
effectively. Currently they can only
use commercial banking services for this purpose. The actual funding
may still come from banks. If DCSEU acquires and vets
the customers and handles all interactions through the real estate
tax mechanism, it would be possible to negotiate lower rates for a PACE mechanism requiring zero bank
interaction with specific customers or the risk of loss from those
customers. As noted above, the AAA bond rating may make bonds
a less costly source of funds.
Installation
Time and motion
studies done by the Rocky Mountain Institute found that German installers are able to
accomplish all installation tasks two to four times faster than US
installers. No specific governmental policy will make
US installers more efficient in loading trucks and getting material
to the work site. This and other needed changes must be a side effect
of highly streamlined governmental policies and a more competitive market
platform. We must expect that economies of scale and long term
experience will allow US installers to emulate German efficiencies.
In the future, there will be specific
additional governmental policy changes required to support installation efficiency. A major policy
direction of the Department of Energy is their Plug and Play
strategy. They envision that people will be able buy small and
modular systems from retailers. Such systems, if plugged into
the grid with a standard interconnect, will become a commodity
that reduces costs and increases functionality with a speed of change
similar to PCs, cell phones and other consumer electronics. There
are a good number of vendors attempting to provide technology in this marketplace. However, there are significant disadvantages with all of them
and the required market scale has not yet appearing. We
will need a more intelligent and a standardized grid interconnect.
It is intrinsically possible for a home smart meter to recognize a
newly connected device in the same way that a PC recognizes a newly
attached printer or flash drive. The recognition could then be
communicated to a central database with automated generation of all
require permitting. Current policies do not presently support this technology. Government should recognize that
these changes are coming and be prepared to implement supportive
policies as the opportunities arise.
Large Scale Issues
The German experience
also demonstrates as solar energy becomes a more significant fraction
of provided energy it will be important that grid managers have the
ability to control the dispatch of energy from all providers. Solar
and wind energy are intermittent energy sources. Blending
energy from various sources will be a complex engineering task as
renewable sources increase as a percentage of the whole supply. In
Germany grid managers make small changes to cycles per second to signal a decline is required in energy provided from the solar energy
systems. If they did not have that ability the grid could be
overloaded. The US will need to achieve similar smart grid
capabilities as increasing renewable energy resources become
installed.
Summary Policy
Implications
The best governmental
policy can greatly lower renewable energy costs. There are
many important elements in such a policy if DC is going to
demonstrate that success at a scale that will inspire much of the
rest of the world. Government is not configured to earn a profit.
However, the success advocated here will have substantial positive
implications for DC income. Many homes will have the capacity to
produce much more energy than they will use. If that power is
provided by a leased system the excess power will provide profits
that will accrue to and be spent by a leasing company chartered
elsewhere. If it is owned by DC residents they will pay taxes on
those profits to DC and spend those earning largely in DC.
If DC provides a large
percentage of the energy used in the city with DC based labor, then fewer of our energy dollars will be supporting West Virginia coal mining and North Dakota gas fracking. Meeting DC power needs
with DC labor, skills and vision is an obvious advantage for our
city. This has the additional benefit of taxes paid to DC providing resources to meet other needs of DC citizens. A strategy
using the best of governmental policy is a win-win
strategy that serves our local needs while providing an example of
success that should serve as a shining example for all humanity.
Resources
German site with
rooftop solar costs in euros:
Rocky Mountain
Institute (three documents)
Can the Cost of Solar
in the U.S. Compete with Germany?
Lessons from Australia
- how to reduce U.S. solar PV costs through installation labor
efficiency
Reducing Solar PV Soft
Cost: Focus on Installation Labor
Chicago Solar Express
project simplifies rooftop PV for city residents and businesses
Mapdwell web site for
evaluating solar energy potential of DC buildings:
http://www.mapdwell.com/en/dc
PUERTO RICO'S POWER GRID DISASTER (an opportunity for change?)
This 2017 hurricane season has battered us with record breaking storms. In Texas as much as 50 inches of rain in some places. In Florida a major hurricane (Irma) traveling straight up the spine of the state for several days in September. Then there is the crisis in Puerto Rico. After Hurricane Irma passed about 50 miles north of that island (Sept. 7), there was an immediate power loss of from 40 to 60% mostly from fallen trees and debris. Power recovery moved along at an orderly pace to near 100% restoration in subsequent weeks. Then disaster really hit the fan!
On Sept. 20, Hurricane Maria hit the south east corner of Puerto Rico at Category 4, and crossed the island before leaving from the north west corner. Except for areas with generator power, the power grid was totally destroyed. As of Sept. 30, 5% of people had electricity, and about half of water was restored. At item #8 in this Newsweek story you can see a night time satellite photo of Puerto Rico on July 24, and again on Sept. 24, 3 or 4 days after Maria first made landfall. The difference is striking.
Since my son and family are living in Puerto Rico in a suburb just south of San Juan, I have been following the disaster story closely. On Sept. 22, he texted, "We are OK." It may be easier to send text messages as they require less tower power. A week ago he phoned my other son and said his water was restored. At one news report I read a comment pointing out that with the total destruction of the power grid it might be possible for Puerto Rico to jump directly into a superior modern power model. This happened in some small Soviet satellite countries who with freedom jumped from antiquated Soviet technology to modern facilities and also with Kenya's phone system.
Now Elon Musk (Tesla) has proposed the possibility of bringing significant amounts of solar to PR. The leadership in PR has responded favorably. This article has a number of comments arguing the possibilities, problems, and potential solutions of extensive solar in PR. One helpful factor would be the decentralization of the power grid, another would be less need for fuel to restore a decentralized solar grid. Tesla has announced plans to send hundreds of the company's Powerwall battery systems to PR to store solar energy, and will work with Sunnova Inc., PR's largest rooftop solar provider.
The German energy company Sonnen will install microgrid systems at 15 relief centers. It will also donate profit from local sales to build as many as 35 more microgrids at PR. These efforts are dependent on reopening of PR's ports. In recent days only 2% of PR electricity has been from renewables. In related developments, GM and other auto manufacturers are planning to make a lot more renewable energy based automobiles. If most vehicles in PR were renewable electric, then their expenses for importing fuel would be much lower.
[I will add solar energy details for PR as they develop. Check back occasionally.]
https://www.dailykos.com/stories/2017/10/2/1703392/-Germany-steps-up-to-help-rebuild-power-grid-in-Puerto-Rico-s-emergency-relief-centers?detail=emaildkre
PUERTO RICO'S POWER GRID DISASTER (an opportunity for change?)
This 2017 hurricane season has battered us with record breaking storms. In Texas as much as 50 inches of rain in some places. In Florida a major hurricane (Irma) traveling straight up the spine of the state for several days in September. Then there is the crisis in Puerto Rico. After Hurricane Irma passed about 50 miles north of that island (Sept. 7), there was an immediate power loss of from 40 to 60% mostly from fallen trees and debris. Power recovery moved along at an orderly pace to near 100% restoration in subsequent weeks. Then disaster really hit the fan!
On Sept. 20, Hurricane Maria hit the south east corner of Puerto Rico at Category 4, and crossed the island before leaving from the north west corner. Except for areas with generator power, the power grid was totally destroyed. As of Sept. 30, 5% of people had electricity, and about half of water was restored. At item #8 in this Newsweek story you can see a night time satellite photo of Puerto Rico on July 24, and again on Sept. 24, 3 or 4 days after Maria first made landfall. The difference is striking.
Since my son and family are living in Puerto Rico in a suburb just south of San Juan, I have been following the disaster story closely. On Sept. 22, he texted, "We are OK." It may be easier to send text messages as they require less tower power. A week ago he phoned my other son and said his water was restored. At one news report I read a comment pointing out that with the total destruction of the power grid it might be possible for Puerto Rico to jump directly into a superior modern power model. This happened in some small Soviet satellite countries who with freedom jumped from antiquated Soviet technology to modern facilities and also with Kenya's phone system.
Now Elon Musk (Tesla) has proposed the possibility of bringing significant amounts of solar to PR. The leadership in PR has responded favorably. This article has a number of comments arguing the possibilities, problems, and potential solutions of extensive solar in PR. One helpful factor would be the decentralization of the power grid, another would be less need for fuel to restore a decentralized solar grid. Tesla has announced plans to send hundreds of the company's Powerwall battery systems to PR to store solar energy, and will work with Sunnova Inc., PR's largest rooftop solar provider.
The German energy company Sonnen will install microgrid systems at 15 relief centers. It will also donate profit from local sales to build as many as 35 more microgrids at PR. These efforts are dependent on reopening of PR's ports. In recent days only 2% of PR electricity has been from renewables. In related developments, GM and other auto manufacturers are planning to make a lot more renewable energy based automobiles. If most vehicles in PR were renewable electric, then their expenses for importing fuel would be much lower.
[I will add solar energy details for PR as they develop. Check back occasionally.]
https://www.dailykos.com/stories/2017/10/2/1703392/-Germany-steps-up-to-help-rebuild-power-grid-in-Puerto-Rico-s-emergency-relief-centers?detail=emaildkre
