I've recently gained interest in a touch screen switch board to run exterior lighting, on-board accessories, etc on a vehicle. In doing my research so far, I have noticed a few people run a SainSmart 16 relay board (SainSmart 16 Relay Board). The problem I have noticed with the relays on this relay board is that while able to handle up to 30V DC, they are limited to 10A and I will have at least one if not more circuits drawing over that load.
My questions are: 1) Does anyone know of a board that is able to hold multiple relays at 12-15V/30-40A load? 2) Does anyone know of a reputable seller of mini relays that are 12-15v/30-40A that could be resoldered in place of one of the stock relays of that board.
The end goal is a similar setup to what this guy is running: https://youtu.be/l18WyvXnecQ
Thanks for any of your help and/or tips, Caleb