The solar industry is flooded with inexpensive, white-labeled equipment manufactured to hit a price point rather than a performance standard. When an installer bids 30% lower than the competition, the savings aren’t coming from efficiency or innovation — they’re coming from hardware that will degrade faster, fail sooner, and cost more to maintain over the life of the system.
At Symmetric Energy, we build infrastructure meant to last 25 years and perform at the level our clients’ financial models require. That commitment starts with the equipment we specify.
Panels: Maxeon and REC
We specify Maxeon (formerly SunPower) and REC panels for the same reason: they have the lowest degradation rates in the industry. Standard commodity panels lose 0.5% to 0.7% of their output every year. Over 25 years, that degradation compounds — a cheap panel producing 400W in year one might only produce 330W in year 20.
Maxeon’s IBC (interdigitated back contact) cell technology degrades at roughly 0.25% per year — less than half the industry average. REC’s heterojunction technology delivers similarly low degradation with excellent temperature coefficients, meaning the panels maintain their output even in the intense California sun where lesser panels lose efficiency as temperatures rise.
Why degradation matters financially
If your financial model assumes 25 years of energy production, the difference between 0.25% and 0.7% annual degradation represents roughly 10% more total energy over the system’s lifetime. On a commercial system, that translates to tens of thousands of dollars in additional energy savings. The “savings” from cheaper panels evaporate long before the system reaches end of life.
Inverters and microgrid controllers: Sol-Ark
For our microgrid and hybrid solar-storage projects, Sol-Ark is the gold standard. They manufacture the most robust hybrid inverters on the market, capable of managing massive inrush currents from large HVAC compressors and pool pumps while simultaneously balancing solar input, battery charge/discharge, and grid power — all without the system faults and shutdowns that plague lesser inverters.
Sol-Ark’s inverters are designed and manufactured in the United States, which qualifies projects for the domestic content bonus under the Inflation Reduction Act — an additional 10% ITC adder that directly reduces the system’s net cost.
The warranty difference
Equipment warranties in the solar industry range from “technically exists but good luck filing a claim” to comprehensive, bankable guarantees backed by financially stable manufacturers. Maxeon offers a 40-year warranty on their panels. REC offers 25 years with a degradation guarantee. Sol-Ark provides a 10-year full warranty on inverters with available extensions.
When we specify equipment, we evaluate not just the warranty terms but the manufacturer’s financial stability and claims process. A 25-year warranty from a company that may not exist in 10 years is worthless. We only specify manufacturers we’re confident will be around to honor their commitments.
We refuse to install equipment we wouldn’t put on our own homes. When your name is on the system, the equipment matters.