Dublin-based renewables venture Solar 21 narrowly avoided an investor-led wind-up petition last March that risked tanking restructuring proposals currently before the court, it has emerged.  Spooked by media reports of cash flow problems at the group, an aggrieved investor, holding €140,000 worth of convertible loan notes, threw down the gauntlet in a solicitor’s letter from AMOSS on March 8: give a detailed account of how Stg£229 million in investment funds raised by the group had been used or face a court insolvency process. The concerns of Investor X (whose name has been redacted from court filings) were well-founded. Solar 21,…