Clean ground

Are you familiar with a marine DCV grounding system? It's based on a star hub grounding system. When you dock you can ground your star hub to the docks ground.. or in your case a new copper ground rod driven in the earth. It has to be completely separate from the house earthen ground.. Your battery charging system is the issue but only when charging..

Every device needs a - and + to work, all devices - are tied together on the star, and the star to the - side of the battery. The + side is the fuse side. The closer to the battery the better.  Use a GREAT automotive or marine fuse bus it makes a big difference in SQ.. Each battery driven component gets it's own fuse..  All battery connections are treated with NoCo. It's a battery terminal contact enhancer and soft sealer..

I've done a few pleasure boat installs.. It's close as long as there is not an onboard AC genset.. Deep cycle DC sound systems can ROCK.

Regards

Liebherr crane

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Bauer uses a Liebherr track and cab, from there on it is ALL Bauer.
They can drill a 3 foot hole in solid granite or basite to what ever depth they can pull out of.. over 100 feet. It’s never a problem drilling the hole its clearing the hole and being able to recover your tooling. 1-5 million dollar rigs.

It wasn’t my forte, but it was the parent company of Klemm
and I had to work on quite a few threw the years.. I was a pretty well known for hydraulics troubleshooting. So concrete pumpers too. Putz and Schwing pump rigs..

Multi pump units, confluence for speed and flow.. and remote.. Pretty serious stuff amigo!.. CANN bus OBD2 + power trains with the new 200k regen engines.. They SUCK.. nothing but problems.. What a F%$#ing mess.

Glad I’m done.. LOL I loved chipping grout to get to 50 30mm nuts and take two days cutting those off with an air ARC. Noisy ba$terd.
To lift a 15 ton cab off a track mount on the side of a mountain at 11,000 feet. I really miss that..

A guys hard hat came off and rolled down the hill an knock out an A HOLE foreman who had his hard hat OFF. The only good thing about the job other than being finished. He got fired, for a safety violation. :-) GOD does smile on me.. he really does.

He yell right up till the time he got knocked out, then he SHUT UP..

Lets say he was well GROUNDED for the purpose of the thread.

Sorry OP, hands are feeling exceptional today, rare..

Marine electrical is two thing, explosion proof, and dedicated - (not really a ground it a completion of the circuit) for every circuit and a star (collection point) for the - DCV battery.
Fuses are again in explosion proof plastics and a second cover in the event of a frag. Most electricians know nothing about DC other than they don’t like it and call it "LO VOLTAGE".

There is no ground in a DC circuit, there is completion of the circuit. They have never used chassis ground unless there was computer involved. The chassis is common it’s not a ground. You can dissipate a static discharge through a common chassis (aircraft) but it is not going to an EARTHEN ground.

I’d keep a separate ground several feet away from a pole ground.. WAY AWAY.. That for overvoltage. PERIOD.

You don’t want to mix them up..

My brother was the BA for the Local IBEW 302. He always came and got his little brother for automotive wiring.. LOL. Great guy.. "Stone face"

Wait till you get bit with 20 12 volt batteries at 12 volts. DEAD! Your DEAD.. a kezillion amps.. no way to let go.. DEAD... Wile E Coyote scene. No holes in you work boot.. and surely no water.. LOL

https://www.google.com/search?q=wile+e+coyote+burn+up?&sxsrf=AOaemvJTyidih9J-2AkEzOPr-w6MOe7Emw:...

Regards