Static Var Generator vs APFC Panel
- Published 17 Jun, 2026
- 6 min read
APFC panels are widely used for stepped capacitor correction, while static var generators provide fast dynamic reactive power compensation for rapidly changing loads.
APFC panel strengths
APFC panels are cost-effective for many factories where load changes are moderate and capacitor step correction can maintain the required power factor.
SVG strengths
Static var generators respond quickly to changing reactive power demand and are useful for welding, cranes, VFD-heavy plants and other rapidly changing loads.
How to choose
Choose based on measured load behavior, required response time, harmonic environment, penalty structure, available panel space and future expansion.
FAQs
Is SVG a replacement for APFC?
In dynamic load applications it can be, but APFC remains suitable for many stable industrial loads.
Which is faster?
Static var generators provide much faster dynamic compensation than conventional stepped APFC panels.
Which corrects power factor faster: SVG or APFC?
An SVG responds electronically in milliseconds, while a conventional APFC panel corrects in switched capacitor steps and is generally slower.
Does a static var generator use capacitor banks?
An SVG generates or absorbs reactive current through power electronics instead of relying on the main stepped capacitor-bank method used by APFC panels.
Can an SVG correct both leading and lagging power factor?
Many SVG designs can compensate inductive and capacitive reactive power. Confirm the operating range and kvar rating for the selected model.
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