inputs.text: sma sunny boy 700u top notch - 700u service 3 months everything claims using killa watt meter tell 94 efficiency rating worse case early morning evening solar noon unit cranking away near 100 efficiency totally silent no fanswhen \\goes sleep\\ killa watt meter cannot even measure burden current truly less 1wthe built quality excellentprior purchase tried one \\far east\\ grid tie inverters cheaply built noisy fan turns 50 watts way less 92 efficiency claimed 80 exact although \\island protection\\ work manufactures never seehem find ul 1741 certification good luck inspector 30 tax credit wo thati recommended solar friends3 48v 250w mono panels series