Why do my lights dim

[Bigbirdd]

I am using 12v solar panels to run my house, I have an inverter/charger to run my refrigerator and internet. I watch my volt meter and run the generator when below 11 volts, The problem is on my 12v side my 12v go to a jbox where I have on/off switches I have 2 different lights and a 12v water pump if I have a light on and turn the water pump on my light dim, I had the same problem with my travel trailer but i thought that was normal . there any simulation to thank you Bigbirdd

[Sunking]

I am using 12v solar panels to run my house, I have an inverter/charger to run my refrigerator and internet. I watch my volt meter and run the generator when below 11 volts, The problem is on my 12v side my 12v go to a jbox where I have on/off switches I have 2 different lights and a 12v water pump if I have a light on and turn the water pump on my light dim,

It is normal for such a low voltage system and such a heavy load. A large percentage of your power is being burnt up by heat (power) and voltage losses with current on your wiring. .

[Bigbirdd]

Just using AC

It is normal for such a low voltage system and such a heavy load. A large percentage of your power is being burnt up by heat (power) and voltage losses with current on your wiring. .

Now the million dollar question. I have a 35 w dc and a 35w ac will they drain my battery bank the same and would I be better off running every thing in my house on ac and using a converter to change back to 12dc at the water pump . Bigbirdd

[Sunking]

What size wire are you using and how long are the runs on the 12 volt stuff?

[Bigbirdd]

Why my lights dim

I se 14 /2 wire runs are 16 feet to switch box then 12 ft from tgere