LONDON--(BUSINESS WIRE)--A.M. Best has assigned a financial strength rating of A- (Excellent) and an issuer credit rating of “a-” to Enel Insurance N.V. (Enel Insurance) (Netherlands), a captive of Enel S.p.A. (Enel Group), a multi-national electric utility company in Italy. The outlook assigned to both ratings is stable. The ratings reflect Enel Insurance’s strong consolidated risk-adjusted capitalisation, a robust, albeit volatile, performance record and the captive’s importance within Enel G