Everyone always needs liability insurance regardless of what they do, you could be selling cotton balls as a third party from the internet, and still need coverage there is no such thing as a business enterprise that cannot be sued. It's how much premium based on what losses that effects the premium.
I'm looking at your business, and the insurance-sense wants me to ask like a bijjion questions, but it comes down to the fact that you sell some pretty top notch electrical power items that are:
•Power Distribution Units
•AC Frequency Converters
•Power Monitoring Products
•Other Power Related Products
First: Do you actually make these things or do you just sell them?
Second: Do you sell out of different states or only one.