Hey Roger, thanks for reaching out!
The Single Rocker Switch # 37212225 will work as long as your power draws don't exceed the following specs:
- SPST, 16 amps at 125V - 250V AC, 3/4 hp at 125V - 250V AC, 10 amps at 14V (T), 3 amps at 125V (L)
Since you're talking about a switch for your main battery I recommend using something with a higher rating like the Marine 2-Position Battery Switch # 277-000403 which has a 300A 12-50V DC continuous rating. view full answer...