the short answer is that a motor will be fine running on a modified sine wave. without getting into a long winded explanation, the modified sine wave will be more inefficient than a pure sine wave and will typically use 15-20% more power to achieve the same result of the pure sine wave...mainly because the frequency above 60hz will not be used and is wasted. electronics and devices with timers that rely on a steady hertz rate will not work properly, but a fridge motor/compressor is nowhere near that picky. the modified since wave inverter has been around for many decades and is fairly robust and a lot cheaper to buy and works fine for most appliances, including motors and compressors
Member III
Member III
Don't run your fridge off the inverter, run if off the 12v cigarette outlet. Your truck is DC (so also thet12v outlet) while the inverter is AC with about a 10-15% overhead minimum. The fridge compressor is also DC with an inverter on the 120v plug side, also with a 10-15% overhead so when you run off the inverter, you're going from DC to AC to DC again and losing at least 20% of your power just in conversions. That's with good inverters like Victron and OEM is going to be worse.
