(Corrects 14th paragraph to say Auren Energia is controlled by two different companies, not a joint venture.) * Brazil's energy surplus due to wind and solar investments outpacing infrastructure * Renova plans $200 mln crypto mining project in Bahia * Penguin, Enegix and Bitmain explore crypto opportunities in Brazil * Concerns over water use and lack of regulations for crypto mining in Brazil By Leticia Fucuchima SAO PAULO, Sept 30 (Reuters) – Crypto mining companies are actively negotiating contracts with Brazilian electricity providers, such as Renova Energia, that would benefit from the South American country's surplus renewable power without burdening the grid during peak times. Following crypto heavyweight Tether, which announced in July an investment in the South American country, t

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