The UL version is the right stuff and can go into conduits. I bought the same class wire from a different company, but price was essentially the same. In my case, I used 3/0 and did the crimps myself. But I have all of the tools to cut and crimp and heat shrink so it was no big deal. One thing I think may be important is depending on the inverter connection, some inverters have the battery cable attached via lugs while others just have the stripped wire inserted into a clamped screw down connection. If that is the case, it may be helpful to use a big wire ferrule on the screw clamp type. I didn't do this and it took extra time to get the connections properly done.