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Solar Gen Guide

Energy My Way

DC Isolator Switch

29/03/2022 by Daniel Gilbert Leave a Comment

DC isolator switches are a great way to disconnect your solar system from everything else. They can be used during maintenance tasks, when you need access and caution for one component but not others in the circuit at that time.

The DC isolator switch is placed in the vehicle’s electrical system:

  • To decouple solar panels from the charge controller.  
  • To decouple batteries from the system.  

When you buy a DC isolator switch, make sure it matches up with your system’s current and voltage. For example, the solar disconnect switches from our panels can handle lower currents but higher voltages while battery-powered ones need higher amperage yet still remain within an appropriate range depending on what kind of cells they’re hooked into.

48 Volts DC, 300 Amp battery isolator switch

800 Volts DC, 25 Amp solar disconnect switch

The circuit breakers are not the best option for disconnecting power. You should always buy an isolator switch with higher voltage and current at a specific point in your system. This will allow you to connect multiple motors without interruption when under load, which makes it perfect for doing things.

Where to place isolator switches

Filed Under: Equipment

About Daniel Gilbert

Hi there – I’m Daniel. I got interested in off-grid solar power a while back. While researching different kinds of systems, devices, and batteries, I found that the information was scattered around the internet.

I'm a licensed electrician, so it wasn't too difficult for me to put together the system myself. But even if you're not familiar with electrical work, there are plenty of resources out there to help you get started. In fact, I've put together a guide on my website that walks you through every step of building your own off-grid solar system.

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