200L works with charger. d40 is hooked up to 12 volt fuse box
I would like to add a 314 amp hour battery for more power.
Best way to wire and wiring diagram?
Thanks
A few Qs. I’m assuming you want to expand the 200Ls Wh capacity? and, Are you wanting to know how to input the 314Ah battery into the AC200L to do this?
If your answer is Yes to both, here’s what I do and not to be picky, as an aside, you don’t increase power, you increase energy. Power is for example the inverter rated output in W, energy is the battery capacity in Wh.
The 1st point - yes you can connect a 12V battery to the solar input of a power station, but it will limit the input watts. My example - I have an AC180, it will accept the 12.8V of the battery, but limit the input current to 8A as the voltage is below 30V. This will only charge to around 12.8 x 8 = approx 100W of charge.
My solution is to use the Charger 1 that I own. It is powered from a spare 100Ah LFP and it then outputs to the AC180s solar input port and will deliver up to 560W of charge depending on the C1 settings. AC180 solar max input is 500W, so I set C1 to 50V out at 10A = 500W.
The key safety issue is to make sure you use a Midi fuse on the positive cable near the battery you add, betwee it and the C1. If you don’t use C1 and go direct, you still need the fuse.
I’ll draw up a circuit diag. shortly. 
Here’s my setup, you can delete the Anderson Plugs for direct wiring. I used them for a plug n play setup as I use both the battery and C1 in other scenarios. The advantage of Anderson, particularly the ones at the battery is that C1 can be diconnected and a LFP charger plugged in to replenish the battery and it allows portability.
I didn’t need to draw this as I remembered I’d done this before, just needed to find the file lol.