I built a small cabin on my land, I was given a heart Interface Freedom model 10 by my bother in law. He used it in his trailer with two deep cell batteries and a solar panel. He now has power so he gave it all to me. I wired the cabin for AC with LED lighting and a few outlets for a radio ect, nothing that would draw a lot of power. I installed it and it just makes noise but no AC power, I checked the cord for the remote and found that the connections were fried. I did check the plug with a meter and got about 10 volts. This unit is old, is it worth repairing? If so can you do it?