I need the boost inverter to power a 31V AC LED string which also work perfectly with 40V DC. UNFORTUNATELY, this boost Inverter is the worst case. By applying 24V DC, it output 36V by default, BUT it sucked without any load 250mA! WTF? I have burned my hand on it! (photo) After some minutes of testing, the Voltage was fallen back to 21V (photo) and even after cooling down, it does not more work. Probably burned out. As my russian neighbour already mentioned, the output condensator is tooooooo small to maintain a stable voltage. Now I will test the second one and if it show the same results, I will request a refund.
Now I got what I expected. The 31V LED String has only 24 Watt and the Boost Inverter simply gaved up from one second to another. I absolutely can not recommend this product.