Power consumption numbers for 320S

donmontalvo

I have a 2024 nuCamp T@b 320S Boondock Black Canyon. It came with a single 100ah Battle Born battery and no inverter.

I am planning to add a second matching battery in parallel. I an attaching my diagram draft (if I make any changes I will update the image and date it here).

I feel confident the components are ok. But I have a few questions:

1. Where can I run the new ground busbar to? There is a busbar on the opposite side of the trailer but it is wholly inadequate for this new battery design. The largest wires connected to that existing ground busbar is 10 AWG whereas I need a place to ground a 1/0 (0 AWG) ground wire for the attached design.

2. I hate to duplicate efforts, so anyone know if there is a document that lists power consumption for all the DC powered stuff that came with the 320S? This will help me calculate wire size to provide the safest AWG. Currently the diagram shows 1/0 (0 AWG) which I hoped would cover things, but I wanted a sanity check.

3. I have a new Victron Phoenix 1200W inverter standing by, so I will add that that power info to any list that may exist.

DISCLAIMER: I am collaborating on the Victron Facebook page, where many of their employees and expert installers hang out…these questions are out of scope for that forum so posting here.

TIA

donmontalvo

pthomas745

There have been various spreadsheets and threads that describe power usage numbers of the 12V devices across the years.  Some of these are more extensive than others.

The larger items in the trailer, the power use numbers are well known from manuals, such as the Alde and the various fridges, the fan, (depending on the model of fan), the pump, etc.  With the larger 400's and different lighting designs inside the trailer, there seems to be some variance on how much power the LED strings use.(Not a whole lot, in any case..

Here is a search for "power spreadsheet" that will have lots of examples of this sort of thing, so you might want to wade through and get an idea.  (I haven't looked at these threads specifically...a different search term may bring back different results.

https://www.google.com/search?q=power+spreadsheet+site:tab-rv.vanillacommunity.com&client=firefox-b-1-d&sca_esv=b7714f4a58b6a0eb&sxsrf=AHTn8zqg8HNCO99-7S9tmtUCqchTxRlHcg:1740240951868&ei=N_i5Z-fUNMm_kPIPw-fusAc&ved=0ahUKEwinzIne1teLAxXJH0QIHcOzG3YQ4dUDCBA&uact=5&oq=power+spreadsheet+site:tab-rv.vanillacommunity.com&gs_lp=Egxnd3Mtd2l6LXNlcnAiMnBvd2VyIHNwcmVhZHNoZWV0IHNpdGU6dGFiLXJ2LnZhbmlsbGFjb21tdW5pdHkuY29tSJI-UPoIWOQ4cAF4AJABAJgBNqABoQqqAQIzM7gBA8gBAPgBAZgCAKACAJgDAIgGAZIHAKAHzQs&sclient=gws-wiz-serp

Yoshi_TAB

Hi,

Here is a load sheet that another TAB user put together.  I added the Air 8 number (compressor running)  based on an experiment I conducted when I installed my inverter.  

In regards to your first question, when I installed my inverter (2000W) and used 2/0 wires for the inverter/battery circuit, I did not run a 2/0 wire to the ground stub from the negative busbar.  That could be wrong, but based on the research I did.  I ran 8 AWG.  I followed other inverter installs and do not recall seeing anyone doing that.  I believe, if I remember,  the rationale was because the DC loads in the trailer were not changing.    But I'd be interested to hear what others with more electrical knowledge  would say.