Review for Renu Energy Solutions

Office location: 801 Pressley Road Suite 100, Charlotte NC, 28217

03/11/2026
Dmitry Pasternak Fort Mill, SC

Intentional Engineering Bottleneck & "Pay-to-Fix" Practices

I am writing this to warn any homeowners in the Carolinas to scrutinize their system design before signing with Renu Energy Solutions (Swell Energy). My experience has revealed a pattern of under-engineering and a refusal to correct documented hardware mismatches. ​The Issue: Renu installed 395W Mission Solar panels paired with Enphase IQ8+ microinverters. In the high-irradiance climate of South Carolina, this created an aggressive 1.36 DC:AC ratio. ​The Result: My system is physically capped. Every sunny day, production hits a hard "flat-top" ceiling for 2.5 hours, meaning the panels are generating power that the inverters are simply incapable of processing. This is not "industry standard"—it is a hardware bottleneck that prevents the system from ever reaching the capacity I am financing. ​The Business Practice: When confronted with the data, Renu admitted to the performance gap in their own simulations. However, instead of correcting the engineering error, they demanded an additional $1,500+ "upgrade fee" to install the correct high-output inverters (IQ8AC/HC) that should have been there on day one. They are effectively attempting to profit a second time from a design failure. ​The "Guarantee" Distraction: Renu attempts to hide behind an "annual production guarantee." Do not be misled—a guarantee based on low-ball annual averages does not excuse installing a system that chokes off peak production daily. ​I have formally escalated this matter to the SC LLR (Case #2026-176 CLB), the SC Department of Consumer Affairs (#C26-01433), and Advancial Credit Union. If you value engineering integrity and honest disclosure of system limitations, look elsewhere.