Review on CZH LABS Electronics Salon Voltage Disconnect Protect by Kevin Phillips

for such a price is quite a worthy device. you need to know two things: first, the switch works with a spring-loaded electromagnetic contact relay. This means it consumes around 1.8W (0.15A) to stay connected. not a huge draw, but enough to drain the battery for an extended period of time. that's 3.6 Ah per day with a 24-hour connection. After a low voltage shutdown, it consumes no power. Another thing to consider is that the voltage measurement is instantaneous, so any load spike will trigger a trip. That's why it doesn't work for my application - to protect my truck's battery from deep discharge while running a portable cooler. A start-up spike on the refrigerator compressor causes the voltage to drop below 11.4V, although the voltage remains at 11.9V after start-up. I can set it to 10.7V, but if it drops that far, even under load, the battery is already damaged. so it doesn't do me much good.