This battery box seems to be well made. I think it will work well in marine applications. READ NOTE: My caveat to potential buyers of this unit is this: This battery case must come with a gasket and strap. Mine came with SIX from each. I hope that doesn't mean the other five people who bought this box won't be shorts. I can only assume they come in half a dozen and someone forgot to distribute the straps and spacers. Just upside down.