Testing A 60A DC To DC Solid State Relay, What The Heck Is All This Noise?

My first test of a 40A DC SSR was a little disappointing with long on delays and high on resistance. This test had me scrambling to see if I hooked it up wrong. There was a lot of noise on the input and the output wasn't even connected. Instead of a photovoltaic transfer of energy to drive the gate, This one used an oscillator and transformer. That results in higher energy transfer to drive the gate and faster transitions. Turn on has a 0,75ms delay and off has a 1.5ms delay. But the actual transition speed is quite fast. That makes this pretty good for pulsing a load. Breakdown voltage tested at 269V.

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My first test of a 40A DC SSR was a little disappointing with long on delays and high on resistance. This test had me scrambling to see if I hooked it up wrong. There was a lot of noise on the input and the output wasn't even connected. Instead of a photovoltaic transfer of energy to drive the gate, This SSR used an oscillator and transformer operating at 45KHZ. That results in higher energy transfer to drive the gate and faster transitions. Turn on has a 0,75ms delay and off has a 1.5ms delay. But the actual transition speed is quite fast. That makes this pretty good for pulsing a load. Breakdown voltage tested at 269V. I had calculated the on resistance before at 35 milliohms. It was a cloudy day and I was running the dishwasher. I was only able to di a couple amps on the video because the attic inverter runs right from PV and a slight voltage drop turns it off. It took three tries to get this video. If using one of these, it is worth your money to get a higher current rated device.