Along with FN 331x series AC EMC/EMI filters on line side, FN 221x series DC filters help meet limits of EN 61000 and other EMC standards for PV installations in Europe and other regions. Both bus-bar filter series are available with ratings from 250–2,300 A, and FN 221x also helps increase solar panel service life, improve its reliability, and reduce potential interference radiations. Versions without capacitors to ground are also available as standard product.