A residential solar array is a long-duration financial asset with a 25-to-30-year service life, and it should be specified like one. OmniYield begins every project with a quantitative analysis of your half-hourly interval data, retail tariff, and roof orientation, because a system that ignores your actual load shape will systematically underperform its nameplate rating. Our objective is not maximum kilowatts on the roof—it is the lowest achievable levelized cost of energy (LCOE) and the highest internal rate of return over the asset's life.
Load profiling and system sizing
Sizing begins with consumption, not roof area. We disaggregate your annual usage into seasonal and diurnal profiles, then model the fraction of generation consumed on-site versus exported. For a typical household exporting at a feed-in tariff well below the import rate, self-consumption is the dominant value driver: every kilowatt-hour used behind the meter offsets the full retail rate plus network and demand charges, while exported energy earns only the feed-in credit. A correctly sized 6.6kWp array on a 5kW inverter—a 1.32 DC/AC ratio—captures clipping-free yield while keeping the inverter operating in its high-efficiency band.
Array engineering and yield modeling
Panel orientation, tilt, string configuration, and shading losses are modeled in PVsyst before any hardware is ordered. We evaluate split-array designs—for example, east/west pitches to broaden the generation curve and better track morning and evening demand—against single-plane north-facing layouts that maximize raw annual kWh. Module-level power electronics (microinverters or DC optimizers) are specified only where partial shading or complex roof planes justify their cost; on clean, unshaded roofs, a string inverter delivers a superior LCOE.
We hold our designs to verifiable performance criteria rather than marketing claims:
- Tier-1 monocrystalline modules with ≤0.45%/year degradation and a 25-year performance warranty to ≥87% of nameplate
- Performance ratio (PR) target of 0.80–0.84 after wiring, thermal, soiling, and inverter losses
- DC/AC ratio of 1.1–1.35 tuned to local irradiance to minimize annual clipping below 1%
- Capacity factor of 16–20% depending on latitude, tilt, and shading
- Documented yield model with P50 and P90 production estimates for finance underwriting
Economics and grid interaction
We present every proposal with a transparent financial model: upfront cost net of incentives, modeled annual savings, simple payback, and a discounted IRR. For most metropolitan households a well-specified system reaches simple payback in four to six years against a 25-year life, implying an effective LCOE well below grid retail rates. Where time-of-use tariffs apply, we quantify the additional value of shifting consumption—or adding storage—into peak-price windows.
Grid interaction is engineered, not assumed. We manage the interconnection application, confirm export limits with your distributor, and configure inverter volt-watt and volt-var response curves to remain compliant with grid-support standards. Where export caps constrain a larger array, we model dynamic export or battery coupling so that curtailed generation is stored rather than wasted, preserving the economics of a fuller roof.