Part of the testimony from the Maine PUC on LD 646, An Act To Remove the 100-megawatt Limit on Renewable Sources of Energy : LD 646 testimony [PDF]
"The Commission notes that expanding portfolio requirement eligibility requirements to large generating facilities is likely to have the effect of greatly increasing the eligible supply for Maine’s portfolio requirements, with the consequence of lowering (perhaps substantially) the price for Maine RECs. This could have a negative impact on currently eligible renewable facilities and, in the event that prices drop to the point where there is no significant market premium, there may be little purpose for maintaining any portfolio requirement." (Bold and Italics added )
"The Commission notes that the cost of Maine Class I RECs has dropped substantially since 2012 and they are currently trading in the range of $3.00 to $5.00."
" During 2012, the costs of RECs used to satisfy the Class II eligible resource portfolio requirement ranged from $0.00 per MWh (some RECs were provided for free as part of an energy transaction) to $1.00 per MWh, with an average cost of $0.15 per MWh and a total cost of $533,247."
79 % of the renewable portfolio is Class II
21% of the renewable portfolio is Class I
There is no reason for the RPS to exist any longer. Maine is well over 50% renewable in generation output.