Now I am a little bit confused with the dip switches. The manual gives an example for the standard settings 24 Volt and a low alarm at 21 Volt. How to configure the low alarm from 21 Volt to 21,6 Volt ? (or anything between 21,5 and 22 Volt?). The reason is that I run a computer network on my boat and I still need a little bit security time for the power supply.)