DC/AC Ratio (Inverter Loading Ratio)
The DC/AC ratio compares array capacity (kWp) to inverter capacity (kW). Indian designs typically oversize DC to 1.1–1.3× the inverter, because panels rarely deliver nameplate power — this fills the inverter for more hours daily.
Beyond ~1.4 the inverter increasingly "clips" midday peaks, discarding energy. Note that DISCOMs generally sanction net-metering capacity by inverter (AC) rating, which shapes how residential systems are sized.
In More Depth
Oversizing DC relative to the inverter is deliberate: modules rarely deliver nameplate power, so a ratio of 1.1–1.3 keeps the inverter closer to full load for more hours. Real examples from our reviews: the Growatt MIN 5000TL-X accepts up to 7,000 W of PV on a 5,000 W inverter (1.4:1), and the Deye SUN-5K hybrid supports up to 7,500 W on 5,000 W (1.5:1) — see the Growatt MIN 5000TL-X review and the Deye SUN-5K review.
Frequently Asked Questions
- What is the ideal DC/AC ratio for solar in India?
- 1.1–1.3 is the usual sweet spot for rooftops. Higher ratios gain energy in low-light hours but start clipping midday peaks beyond roughly 1.4.
- What is clipping?
- When the array produces more DC power than the inverter can convert, the inverter limits its output at its AC rating and the excess is lost. A little clipping at a high ratio can still be a good trade if the extra morning and evening energy outweighs it.
Related Terms
Part of the HUM Solar Glossary — 75+ plain-language definitions for India’s solar ecosystem, maintained as a neutral reference. Browse all terms →
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