SolarUnion

Primary Lines of Business

  • Installer

  • Financing Company

  • Energy Auditor

SolarUnion

Primary Lines of Business

  • Installer

  • Financing Company

  • Energy Auditor

Additional Services Offered

Additional Services Offered

  • Installation
  • Financing
  • Energy Auditing
  • Construction
  • Electrical Contracting
  • General Contracting
  • Solar Repair & Maintenance

Why Work With Us

Why Work With Us

All premium SolarUnion systems include complementary monitoring hardware and software. Complementary monitoring mobile app.
Premium SolarUnion systems include production guarantee for the life of the asset.
Premium SolarUnion systems include bumper-to-bumper performance guarantee for the life of the asset.
Premium SolarUnion systems include output guarantee for the life of the asset..
Roof integrity warranty included.
Full-service solar developer offering a 25-year Performance Guarantee that covers for parts, labor and output for the life of the system.
Diamond Certified (Rated Highest in Quality on Customer Satisfaction, Insurance Coverage, License and Business Practices) with hundreds of verified reviews.
Provides a roof integrity warranty for the life of the system.
Carries a $5MM insurance policy for the work performed on your site.
Premium in-house certified solar electricians and selected network of vetted installers with decades of experience across the State of California.
SolarUnion clients enjoy savings from Day 1, with cumulative savings in the thousands of dollars.
SolarUnion is also a turnkey installation provider for the leading, nationwide solar financing funds, SunPower Corp., Sunnova Inc., and SunRun. These funds are extremely thorough, diligent and disciplined in selecting their partners and rely on SolarUnion to provide quality installation for their long-term solar investments.
SolarUnion designs state-of-the-art, high-performance photovoltaic systems for full/permanent electric consumption offset...the only payment you will make to address your electric consumption needs will be the payments on the solar investment. Effectively, your electric consumption bill with your utility moving forward will be $0. In locking your $ / kWh rate with solar while fully offsetting your utility’s electric consumption bill you save hundreds of thousands of dollars, increase the value of your real estate and rely on the green alternative, a multiple-bottom line approach.

More About Us

More About Us

We are a full-service, turnkey solar electricity developer and installer founded in the heart of Silicon Valley. We sell, design, build, install and service photovoltaic (PV) solar systems to deliver the cleanest, greenest electricity at affordable rates. Our clients (residential homeowners) start to enjoy savings from Day 1, with cumulative savings in the thousands of dollars. We exist to bring transparency to the solar market and price at least 10% below the larger players. Our goal is to transform the market and provide access to clean energy to ALL Californians, not just to those that can proof financial means.

Technology Offered

Technology Offered
  • Energy Efficiency
  • Solar PV

Reviews from Our Community

Reviews from Our Community
19 Reviews
Write a Review
stephaniebirch2002
"After careful consideration and TONS of research"
Reviewed Sep 08, 2016
"After careful consideration and TONS of research"

Was initially discouraged by the pressure tactics of solar companies until I met these guys earlier this year. The energy auditor gave me a bid and actually encouraged me to go out and keep comparing. He told me to compare value, quality and performance guarantees then come back to them ...

Read More
Was this review helpful?  YES  |  NO
jestrada
"Customer feedback for SolarUnion"
Reviewed Sep 08, 2016
"Customer feedback for SolarUnion"

First of all, we were very happy with our decision to transition to solar energy. The savings that we are now reaping definitely outweigh all the time spent researching, negotiating, and eventually working with the selected installer of our solar panels.

Comparatively, for the cost, SolarUnion was a good one ...

Read More
Was this review helpful?  YES  |  NO
rodolfoyduran
"Excellent service and great product"
Reviewed Aug 24, 2016
"Excellent service and great product"

I am more than pleased with the service provided. Renzo and Ivan are a pleasure to work with and their professionalism is superb. The solar panels are delivering incredible power and more than enough to zero out the electric bill and sell some to the grid. Thank you very much.

1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
aldo628
"These Guys R-O-C-K!"
Reviewed Aug 13, 2016
"These Guys R-O-C-K!"


I chose SolarUnion after I verified they were a Diamond Certified company.

SolarUnion was large enough to give me the level of comfort I needed that they would stand behind their 25-year output warranty as they advertised, yet still small/boutique enough to take a job that was too complicated ...

Read More
1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
clementinabarragan123
"Premium solar developer offering a credible performance guarantee"
Reviewed Aug 10, 2016
"Premium solar developer offering a credible performance guarantee"

I wish to commend the team at SolarUnion for the transformative work they are performing in the residential space and for their flawless execution on my PV system.

I must admit to being a CA licensed solar contractor having experience in the utility scale solar power plant fields in domestic ...

Read More
1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
dhcouch1
"Smooth and easy"
Reviewed Jul 24, 2016
"Smooth and easy"

I have been very happy with the service from Renzo and the folks at Solar Union! They were very quick to follow thru at every step, and extremely responsive to every question. I am kind of a detail-oriented person and went thru the contract quite thoroughly - Renzo never gave the ...

Read More
1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
xtreme78
"Great experience! "
Reviewed Jul 24, 2016
"Great experience! "

Renzo and the Solar Union team far surpassed what I expected from a solar intaller. They were friendly, always on time and best of all they were fast. From start to finish the entire process took a little over a month. I would highly recommend Solar Union to anyone looking ...

Read More
1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
jamesellman
"excellent contractor experience "
Reviewed Jul 24, 2016
"excellent contractor experience "

I have remodeled most of my home over the last 5 years. The install of the Solar power system with SolarUnion was one of the best experiences I have had. Their price was very competitive as well at 3c per watt.

1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
pintadel
"Excellent experience"
Reviewed Jul 24, 2016
"Excellent experience"

After shopping around for over a year they gave me the best price, by far.

My roof is a challenging one and many solar companies simply walked away - Solar Union did not.

Once I decided to move forward, they were able to do the install very quickly (within a month ...

Read More
1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
netbuy
"SolarUnion met all my expectations"
Reviewed Jun 29, 2016
"SolarUnion met all my expectations"

I was initially apprehensive about doing business with this small company that has only been in business since 2011. I initially wanted the supposed long term stability of a much larger solar/roofing company that has been in business for much longer, but SolarUnion totally won me over with their ...

Read More
1 out of 1 people found this review helpful
Was this review helpful?  YES  |  NO
mail
"It took several years to find right company"
Reviewed May 22, 2016
"It took several years to find right company"

After several years of contacting solar installation companies I was was pleased to find a company that met all my needs. Having been run through the sales pitch - solar is great sign here - from big box and even at least two local companies (which would have been my preference - AC ...

Read More
3 out of 3 people found this review helpful
Was this review helpful?  YES  |  NO
judysarna
"New to Solar Energy"
Reviewed Apr 10, 2016
"New to Solar Energy"

My first inquiry regarding conversion to solar power was made through the City of Berkeley website which referred me to Energy Sage. After I made a request for bids on the Energy Sage website, I received two bids, one of which was from Solar Union. The Solar Union representative answered ...

Read More
3 out of 3 people found this review helpful
Was this review helpful?  YES  |  NO
bdonnelly11
"Good experience with Solar Union"
Reviewed Apr 10, 2016
"Good experience with Solar Union"

I can't speak highly enough about the service I received from Renzo Castillo and his team at Solar Union. They were knowledgable, experienced and thorough. I talked to 6 or more solar installation companies before choosing SolarUnion. Their prices are fair and they followed through on all their commitments.

2 out of 2 people found this review helpful
Was this review helpful?  YES  |  NO
bfearnow
"Outstanding experience"
Reviewed Apr 03, 2016
"Outstanding experience"

Renzo and Ivan were great to work with. They explained the entire process very clearly and the installation went off without a hitch. So far, the systems is producing exactly as they indicated it would. I would highly recommend them to anyone looking at a new solar installation.

2 out of 2 people found this review helpful
Was this review helpful?  YES  |  NO
srinivas_palnati
"SolarUnion installed 3KW system on my roof without hassels"
Reviewed Mar 18, 2016
"SolarUnion installed 3KW system on my roof without hassels"

I liked their service mainly the following:
- Lower cost comparitively with other solars
- Thought my electric panel is old and not supported, they got the upgraded one
- their customer service is very responsible and immediately answered
overall the system is working very fine.

2 out of 2 people found this review helpful
Was this review helpful?  YES  |  NO
melody.manhoff
"Great panel but took forever and needed A LOT of micromanaging"
Reviewed Mar 02, 2016
"Great panel but took forever and needed A LOT of micromanaging"

The short review:
The panels are great, they are extremely responsive to my questions, they were willing to work with me and still return my calls quickly after getting my money. However the process took 4 months and required several nasty emails on my part to get things done.

Long ...

Read More
12 out of 12 people found this review helpful
Was this review helpful?  YES  |  NO
freedomfred
"I have solar"
Reviewed Feb 28, 2016
"I have solar"

The team's great! But they are only a middleman.
While communication has not always been up to my expectations, we have overall developed a successful relationship and the panel are meeting expectations at a competitive price.

6 out of 6 people found this review helpful
Was this review helpful?  YES  |  NO
jayeshseshadri
"Great service at a great price"
Reviewed Oct 02, 2015
"Great service at a great price"

I was very interested in going solar this year, and spent a lot of time going through many solar companies on EnergySage. I am glad we picked SolarUnion / FirstPV as our solar installer.

We were time crunched as we had started the process in late March, and I really wanted ...

Read More
9 out of 9 people found this review helpful
Was this review helpful?  YES  |  NO
eric+energysage
"SolarUnion really delivered"
Reviewed Oct 02, 2015
"SolarUnion really delivered"

I'm delighted with my experience working with SolarUnion through EnergySage. They are extremely responsive, thorough and flexible. The pricing was better than the competition and they deliver more current products with the goal of replacing our total electrical consumption. Other companies merely committed to reducing the bill, not replacing it ...

Read More
9 out of 9 people found this review helpful
Was this review helpful?  YES  |  NO