A movable electrical generation system comprising: a generator operable to produce a supply of electrical energy; a prime mover operable to drive the generator ; a first fuel ; a second fuel different from the first fuel ; a control system is operable to deliver one of the first fuel and the second fuel to the prime mover characterised in that : the control system is configured to control an electrical load applied to the generator based on one of a first current protection limit associated with the first fuel and a second current protection limit associated with the second fuel, wherein in response to the delivery of the first fuel to the prime mover , the control system implements the first current protection limit and controls the electrical load applied to the generator based on the first current protection limit to avoid exceeding a power rating limit of the prime mover , and wherein in response to the delivery of the second fuel to the prime mover , the control system implements the second current protection limit and controls the electrical load applied to the generator based on the second current protection limit to avoid exceeding the power rating limit of the prime mover . a generator operable to produce a supply of electrical energy; a prime mover operable to drive the generator ; a first fuel ; a second fuel different from the first fuel ; a control system is operable to deliver one of the first fuel and the second fuel to the prime mover characterised in that : the control system is configured to control an electrical load applied to the generator based on one of a first current protection limit associated with the first fuel and a second current protection limit associated with the second fuel, wherein in response to the delivery of the first fuel to the prime mover , the control system implements the first current protection limit and controls the electrical load applied to the generator based on the first current protection limit to avoid exceeding a power rating limit of the prime mover , and wherein in response to the delivery of the second fuel to the prime mover , the control system implements the second current protection limit and controls the electrical load applied to the generator based on the second current protection limit to avoid exceeding the power rating limit of the prime mover . the control system is configured to control an electrical load applied to the generator based on one of a first current protection limit associated with the first fuel and a second current protection limit associated with the second fuel, wherein in response to the delivery of the first fuel to the prime mover , the control system implements the first current protection limit and controls the electrical load applied to the generator based on the first current protection limit to avoid exceeding a power rating limit of the prime mover , and wherein in response to the delivery of the second fuel to the prime mover , the control system implements the second current protection limit and controls the electrical load applied to the generator based on the second current protection limit to avoid exceeding the power rating limit of the prime mover . <EOS>