Not the poster, but I live off-grid on a boat in the UK and pretty much everything (including the laptop I'm commenting from) runs off 12V DC.

I have 800W of solar panels and a 3.5kWh LFP battery bank.

I use approximately 2kWh per day in summer, 1kWh in winter, 500Wh when it's cold enough that I can turn the fridge off.

In the summer I dump any excess to an immersion water heater.

At that level the self-consumption power of an inverter, about 5-10W, is significant so I avoid relying on it for anything powered all day (but it's useful for appliances, power tools and other intermittent items).

Using incredibly wasteful amounts of energy isn't necessary, people just do it.

Unless there is some space/weight constraint, adding additional battery capacity for idle draw and running an inverter is likely less expensive than trying to find 12v only equipment.

OP is running sealed lead acid batteries, they could have 5-6x the capacity using LFP batteries with the same weight.

In America, a 1,000 square foot home uses an average of 8x the energy you do during the summer. I find that amount to be somewhat lower than I expected to be if I’ll be honest. After all, America is the land of central air conditioning and clothes dryers.

I’m sure you’re aware of this already, but maybe it’s worth pointing out to people that changing your lifestyle to consume less doesn’t require boat life, van life, or tiny home life. A smaller conventional house and a more thoughtful use of your thermometer will go a long way. Hang up your clothes instead of putting in the dryer, as a bonus they’ll last way longer.

Why not use higher voltage, like 24 or 48V?

Why dumping the excess is needed?