Bob, I use 120VDC for my home, plus some 12VDC for controls, etc. Both filtered with -110dB from 10K to 2GHz military grade filters and in EMT conduit with compression fittings. I don't use AC in the home because it's only useful function is for running motors, which I don't use in the home because of sound and the ELF magnetic fields. The inverter is using my 120VDC battery bank/PV charge controller as the source, and it's output shares the same conduit as the shop and house feeds (as does my ST-3 output).
I have 250 feet of conduit from the battery bank building to the shop/house, so 76 meters. The building was located on a hill which is ideal for a wind generator, but I found PV was more than adequate even in winter, here.
You mention DC as being less safe, when in fact, this is not true. For any given voltage, DC is about 4x safer, including the "can't let go" threshold. This is well established. I thought otherwise myself until I did some research.
There is no difference between AC and DC for power emission as far as higher frequency EMI. I have misled you - I am only talking about the EMI on the DC and inverter generated AC wires, now measured in my shop while the inverter is switched on. The same switching power supply for computer equipment on my 120VDC system makes just as much EMI on the DC as it does on AC. (I have a 7 stage LC filter for the computer gear.) The difference is that filtering of DC is much easier and more efficient, since capacitors don't heat/dissipate 60/50Hz power while trying to remove high frequencies. There is no limit on inductors, either. You can add as much capacitance and inductance as you need, though the same EMC rules regarding stages for "woofer", "midrange", and "tweeters" apply.
I developed this low EMI inverter so that I could run via PV power on sunny days my well pump (1380W), which is far removed from the house and shop, and the washing machine(1100W), which is in the shop. I also wanted to test my design theory which I first applied successfully to a redesign of the electronics of the EL-SID circ pump (the only brushless DC circ pump at that time) about 17 years ago; that EMI is best controlled by slowing the slew rate of switching; that most of the losses of slow switching are compensated by reduced gate drive power. That method is now being used by Texas Instruments in their latest variable speed motor drive IC's. The industrial control situation has gotten so bad (EMI-wise) that finally designers are trying to address the problem at the source, instead of the liberal and expensive application of EMC band-aids everywhere else. I've taken the same basic approach to a more extreme level; for very slow switching of power MOSFETs, you cannot just increase gate drive resistance. It requires some additional specialized circuitry. It also requires very careful selection of the MOSFET. Today, some MOSFETs are now rated for linear operation with full safe operating area data provided. When I first applied the slow switching method to the EL-SID circulation pump, I had to test and use higher voltage MOSFETs since no linear data was available. Today it's much, much easier and some companies make great choices for slow switching that have very low on resistance (high efficiency and little heat).
It is unheard of for a 1500W (or even a 100W) inverter of any kind to produce dramatically lower EMI on the connected AC and DC cables than that produced by a typical 10 watt power supply. This one has less audible EMI at the attached cables than an LCD wrist watch. Those offered commercially today will typically obliterate the entire AM band anywhere in or near the house since all the wiring radiates this EMI. Early on in my development of my inverter, I decided to just disconnect the more extreme slew rate control circuitry to see what the emissions would be like. The entire AM band was wiped out, within 8 feet of any connected wires. So by design, I'm reducing emissions by over 90dB, with very little efficiency penalty. I am sacrificing some THD, intentionally, but 8-9% THD is better than my ST-3 at 12% and it allowed me to take slow switching to an extreme.
This is not your typical DIY inverter.