Silly leisure battery in van question

[Pesty]

When the van isn’t in use the main battery drains pretty quick.

I’ve put a small solar panel to help but if it gets too low the fuse blows and no charge at all goes in.
I’ve been disconnecting the leisure battery at the negative terminal. This seems to have cured the issue the solar is enough to keep main battery topped up.

Just wondering if this is dangerous in anyway I’m disconnecting at the leisure battery side.

[Pesty]

Thanks

It’s probably Wired backwards, van is great wiring less so. Good point though I’ll check it out .

[Pesty]

Thanks I’ll take a look. It may have one buried somewhere.