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 knowledge, patience, responsiveness, selection of top quality components at great prices and a highly competitive bid.
I don't believe it was easy for Renzo Castillo and Ivan of SolarUnion to win my business. Renzo has never failed to be patient to answer all my questions and accommodate my requirements. SolarUnion has earned my business not by slick sales talks but by going the extra mile.
Renzo took the time to explain to me in great detail the reasoning behind SolarUnion's selection of components. Ivan and Renzo have the brains to select components that perform very well, reliably, and are offered at highly competitive prices from manufacturers that are likely to stay in business for many years to come in case warranty issues arise.
Don't let the fact that the modules are Chinese-made scare you. The Trinasmart panels SolarUnion offers perform VERY WELL. Renzo made me a believer in the virtues of a system based on Trinasmart panels and Tigo optimizers. I am very pleased.
About the only drawbacks I can think of with SolarUnion are that subcontractors do all the installation work for them and that SolarUnion is really a small company. SolarUnion doesn't have its own crew of installers, but this is probably an advantage in that it gives them flexibility and be more competitive. The more competitive they are the more likely they will remain profitable and stay in business. I absolutely want my solar installer to be around many years from now when I need them.
SolarUnion is somewhat unique in that they offer a "Trifecta" triple guarantee, which includes a solar energy production guarantee, i.e. they guarantee your solar system will produce a certain number of kWhs every year. It may sound too good to be true, but based on this Trifecta guarantee, SolarUnion would have to replace a very expensive main inverter at their expense if it ever breaks down in the next 25 yrs. It may sound too good to be true, but Renzo confirms in his email reply that this is how SolarUnion interprets the Trifecta guarantee. We shall see if they is really true.
My positive review is a reflection of my experience so far (up to the point of a newly completed installation). It is not reflective of any post-installation interactions that may require warranty/corrective work since I have no need for warranty/corrective work yet. I have every expectation that SolarUnion will stay in business for many, many years to come and that I will be as pleased with them in the next 25 yrs. as I am today.
I noticed a water stain due to leak from a suspected solar mount. It occurred in the phenomenally wet winter we had last years. I notified Renzo on October 31, this year (2018) and within minutes received a phone call back from Renzo stating that he would develop a strategy to deal with the problem and respond back in two days. Now, it's been two weeks, without any further reply from him. A company's rating is not only for before and during sales, but it also reflects post-installation responsiveness to repair needs. And in this area, Solar Union is getting a very poor grade.