Sorry for the brief response earlier (had to juggle a couple things). Here is a detailed response, now that we know more details that were not included in the original post.
Net metering is usually meant to allow the utility account holder to offset his annual on site electrical consumption. This is usually done with renewables but it does not technically need to be this way. Energy is generated every month or billing period. If the amount of energy produced is greater than the energy you consumed that billing period, the credit is carried over to the next billing period and you get a bill for just the service charges associated with the privilege of having an electric account. If you generated less than you used, then you would get a bill for the difference. Note that you are credited for the full retail cost of electricity from the utility that you put into the "bank". Think of this as a 100% efficient "battery". Since the net metering cycle with most utilities lasts for one year from date of meter installation, you can carry your KWH credits forward for one year. At the end of one year, the utility usually has to "true up" your account. They will usually pay you for any excess energy you produced (more than you consumed in one year) at the avoided cost (some utilities vary so check with yours). There are also many other rules. For instance the utility in my area requires the generating equipment to not produce more than 110% of your annual consumption (PERIOD). If you think about this long and hard, it will become apparent that you will never turn a profit by installing more capacity than you need. This is done purposefully, and at the utilities discretion, you may or may not even be granted the ability to inter-connect. With that said, you need to look at the whole picture, the yearly usage. It is measured in KWH's (energy/time). Most utilities, if not all, do it this way in the US, granted the utility supports or offers a net metering agreement to the end users. You must sign a parallel generation agreement, and a single phase attachment agreement to allow your energy producing equipment to be tied to the utilities equipment. In the US, you will need to use a UL certified and type tested piece of equipment to do this. It could be an inverter, or a generator meant for backfeeding. The latter are rare and expensive, and usually it is done with an inverter (which is totally fine and works quite well if done right). The inverter usually needs to be UL1741 and IEEE listed for Anti-Islanding protection. Im sure your generator does not do this. Therefore you will most likely be using an inverter to accomplish what you want to do.
You will most likely be required to have a few electrical inspections before your system can be activated. One usually by the underwriter, and one by the utility. Your system will need to be installed possibly by a master electrician and be installed to NEC code (depends on your townships requirements).
In most instances, the inverters are installed with a solar PV or small wind system. These are renewable resources, and this is what gets the utility "brownie points" as far as any Fed energy mandates are concerned. The utilities want really bad to hold onto the Renewable Energy Credits (REC's) when these systems are installed, because thats what matters in their eyes and this is what in the end justifies their huge amounts of dollars pumped into their renewable energy portfolios. Your generator running on WVO carries no REC's and therefore the utility is that much more likely to give you the cold shoulder. But go ahead and try. Its a lot of hoops to jump through. If you would be willing to put in PV or wind, it might be a different story. Just based on my experience. I have never tried to connect my WVO generator to the grid (even though I have the capability) and I choose to remain off grid for my equipment testing abilities.
If you are planning on using the generator to generate 3 phase because you dont currently have this capability, that is another story. You still will be required to have some sort of means to convert the 3 phase to at least single phase 240v for grid tie purposes if this the type of account you have. The utility might not like this, although in my opinion, what is on the customer side of an inverter should be the customers business.
These are just some thoughts off the top of my head.
