Reddit reviews Bussmann LP-CC-12 Fuse 12A 600V

Happy to be of service. I really like helping people realize these projects are completely doable. I spent the better part of a year researching mine and begging my electrician friends to let me pick their brains anytime we were hanging out. I'm happy to pass that on.

Yeah, if they're under a heavy charge (like an equalization cycle, which your MPPT will do every 14 days for several hours) or discharge, they vent hydrogen into the air. I should have bought AGMs. I bought FLAs. Mostly they just need checked every couple months for water levels.

I'd keep them in series like you are. I have mine setup differently because they're on a bus, and I can't control the shadows that hit them as much. So, I need them to be kind of independent. If you have a cabin, I'm sure you have a way to make sure they're always out of the shade.

Yep, that's true about the 4AWG interconnects. It's just such a short distance that it probably wouldn't cost much to make them a little beefier, and that gives you some future-proofing if you ever decide to throw an inverter on them.

You should download the manual for the MPPT before you buy it. Read it so you know what you're going to need as far as connectors and stuff.

Good point on the fuse. I forgot you were doing 150V when I typed that section. My apologies. Instead of an ANL fuse, look for a CC type fuse rated for 150VDC and 10-12A. Eaton/Bussmann makes them and they're like 5 or 6 bucks if you can find one cheap on Amazon. They're more like $25 if you have to buy from somewhere expensive like Grainger. Also, you need a special fuse box for them. They're basically what houses had before breakers.

This one might work... but it's only AC rated. Because the polarity on AC alternates 60 times a second, it's what's called "self-extinguishing." Meaning AC has a hard time to hold an arc for a long time. DC doesn't alternate, so it just burns an arc until the air-gap gets long enough that it can't sustain it. Typically you de-rate AC gear by 50% when using it for DC. This is a 600VAC fuse you'd be using for 150VDC. That's twice as much safety margin. It'll probably be fine, but I'm not an electrician or anything. Do your own research and shopping until you're comfortable.

As for that ANL fuse you found... Man, you found one of the most expensive fuses on Amazon. But, yes. That's exactly the type of thing I meant for everywhere else. Try this instead and use the leftover cash to take a couple cases of beer and a nice steak to the cabin with you. I'm using a few similar car-stereo grade ANL fuseholders in my system, but they're 400A fuses because of the big inverter.

And you only need to fuse your positive side. Negative DC should be grounded. Properly grounded. Look at your local building codes for grounding requirements. Ground moisture, soil composition, and lots of other factors affect grounding requirements.