Sales & proposal integrity
Sales Integrity7.0/10
Reviewers generally describe the sales process as informative, low-pressure, and willing to answer questions in detail. A smaller set of comments says some proposals felt incomplete or that follow-up was needed to correct communication-related deficiencies.Solar.com's composite of published customer feedback, not a customer quote
Low-pressure explanations. Many reviewers say representatives took time to explain options and answer questions without making them feel rushed or pressured. Representative review excerpt: "He never made us feel rushed or pressured, and he took the time to answer all of our questions and explain the details so we could feel confident in our..."
Helpful, detailed consults. Reviewers also describe sales visits as thorough, with clear walkthroughs of system needs and next steps. Representative review excerpt: "He went into my attic checked out my system and thoroughly explained to me my options and what I needed to repair things, but also what I could potentially do..."
Occasional proposal concerns. A smaller number of reviews report concerns about incomplete quotes, pressure around replacements, or the need for management to correct communication issues after the sale. Representative review excerpt: "The quote he left for replacement of the water heater was $2500, no mention of repairing the leaky gas valve or any other approach, but most importantly no mention of..."
Price & financing transparency
Price Transparency6.4/10
Because the evidence set is limited, this category reads positive-to-mixed rather than strongly negative.Solar.com's composite of published customer feedback, not a customer quote
Fair or favorable pricing. Reviewers describe a recurring pattern in this area. Representative review excerpt: "Their prices were a lot lower than my first estimate."
Open cost discussions. Some customers say questions about pricing were handled sincerely and without making them feel rushed or dismissed. Representative review excerpt: "I really appreciated their reaction to my questions, which seemed sincere, by not making me feel I was in the way but, that I was really interested in this process."
Cost and follow-up concerns. Other reviews mention expensive work, unclear pricing, or frustration when cost-related issues were not resolved promptly. Representative review excerpt: "Come to today, and after a few months of calling Greiner, getting the run around, non call backs, blow offs and the final word from Greiner that its a huge..."
Communication & coordination
Communication7.5/10
Communication is one of the stronger themes in the review set, with many customers praising responsiveness, appointment reminders, and clear arrival updates. The complaint count is low, but a few reviews describe missed appointments or coordination issues that needed follow-up.Solar.com's composite of published customer feedback, not a customer quote
Responsive support. Reviewers frequently describe the team as professional and responsive, with appointments scheduled quickly and calls returned promptly. Representative review excerpt: "Always 100% professional and responsive--we have had a very positive experience with Greiner for our HVAC and solar/electrical needs."
Helpful updates. Customers also mention reminders, ETA updates, and clear communication about technician arrival and location. Representative review excerpt: "We scheduled our semi annual HVAC maintenance appointment and received a reminder email with ETA and a photo of our serviceman!"
Rare scheduling misses. A small number of reviews report delayed appointments or coordination issues that affected the experience. Representative review excerpt: "Waited more than 30 minutes after our appointment time, then called them to see what happened."
Timeline reliability
Timeline Reliability7.0/10
Most reviewers say scheduling and project timing were handled reliably, with on-time arrivals, efficient work, and quick responses after installation issues. A few comments mention delays, missed appointments, or inspection-related complications, but they appear limited in the evidence set.Solar.com's composite of published customer feedback, not a customer quote
On-time, efficient visits. Many reviewers say crews arrived on time and completed the work efficiently. Representative review excerpt: "Brett and Henrique arrived on time and worked efficiently to install a new mini-split system in my shop."
Quick post-install response. Some customers report fast follow-up when an issue came up after installation. Representative review excerpt: "Fourth, about a week after the install, there was a small issue with one of the units and Greiner sent out a technician within an hour."
Occasional timing issues. A few reviews mention late arrivals or installation complications that affected inspection readiness. Representative review excerpt: "I would not recommend a business that can't even show up on time to there scheduled appointment."
Workmanship & site care
Workmanship7.7/10
Installation workmanship is described very positively overall, with reviewers highlighting professionalism, clear explanations, and clean job sites. The complaint rate is low, though a few reviews mention installation issues or damage concerns tied to service work.Solar.com's composite of published customer feedback, not a customer quote
Professional installation crews. Reviewers often describe the crew as professional, knowledgeable, and careful during the job. Representative review excerpt: "Ernesto, Armando, and Marco also joined Eduardo and Marcus during the install and everyone was extremely professional."
Clean finish. Customers also note that installations were completed neatly and that the site was left clean afterward. Representative review excerpt: "The system they installed was excellent, the ceiling intake work looks amazing, and they made sure everything was clean in the end."
Rare installation complaints. A small number of reviews mention installation-related issues, including inspection problems or concerns about the quality of a repair. Representative review excerpt: "I bought a furnace from them, the technician broke the connection to my air conditioner then wrapped it with a lot of tape to cover it up."
Long-term support & performance
Long-Term Support6.9/10
Post-install feedback is mostly positive, with reviewers describing good system performance and prompt help when problems arise. There are still a few complaints about service follow-through or post-install coordination, so this category lands just below the stronger operational areas.Solar.com's composite of published customer feedback, not a customer quote
Strong system performance. Many reviewers say their systems work well after installation, including efficient heating and cooling performance. Representative review excerpt: "In short, we love our new heat pump, especially the fact that it blows so softly it's almost unnoticeable and it maintains the same temperature all day long using far..."
Prompt repair support. Some customers report that service issues were diagnosed and fixed quickly after the system was up and running. Representative review excerpt: "He found the original problem quickly and repaired it promptly."
Limited post-install complaints. A few reviews raise concerns about post-install service, including unresolved support questions or pricing tied to later work. Representative review excerpt: "We were assured that there were no problems, as we could call Greiner and they would come take the panels off and reinstall them for around $800 dollars give or..."
How this is built: category scores and summaries weigh the company's full published rating record (1,612 Google reviews averaging 5.0 stars), the most recent and most relevant review texts, and recurring feedback themes verified acrossGoogle. Ratings and review excerpts from published review sources. Refreshed as new feedback is published. No installer can pay to change it.