In general, maintenance of a natural gas unit is pretty simple since the fuel never goes bad and you don't get residue like with gasoline or diesel fuel. The unit just needs to be started periodically and the oil needs to be checked and changed as needed. Personally, I set an email reminder to remind me to start the generator every 6 months. If your generator has a battery start, you need to keep the battery charged.
Instead of an installed battery, I prefer to use a Jump Start Battery which is always charged and ready to use.
Don't forget to keep some engine oil handy in case you run low or need to do an oil change.
