Mason, without naming specifics, I can't think of too many devices that have a continuous 250-300W draw. Bipap/cpap type, but when you say treatments, I am thinking maybe you mean oxygen therapy, or a nebulizer. I believe those oxygen concentrators draw quite a bit more than 300, but its not continuous.
If its the first 2, you have other options which give you more flexibility- (DC powered cpap native 12v and dc nebulizers). If it is the oxygen concentrator, you would need to keep that running.
The other factor is of course, the other creature comforts- lights, fans, etc, and don't forget the Fridge. Don't know how rural you are, but Im going to assume that since you have a 500gal propane tank, you have no Natural gas. Your home may be either a electric water heater, or a propane one.
I've had some family with some medical issues- while its under control, I did do a setup at home in case of prolonged outtage in case they needed to be moved from their own home.
Thank you for your thoughts and insights.
The equipment is:
oxygen concentrator (bad days 24 hours a day) However, not often at a bad level (every sixty to 90 days). On bad days back up with grid power or in grid down situation propane generator to supplement. We also have oxygen tanks that will last several days. Normally one hour a day to produce Ozone.
Ozone generator (medical office grade device) Combined with the oxygen generator produce two types of therapy. Ozone generator consumes watts like a portable computer (operates 1 hour a day)
Rife Machine (Medical Office grade device). - Consumes watts like two refrigerators (operates 6 hours a day)
Quantum entanglement scalar wave generator - Consume watts like two refrigerators (operates 4 hours day)
Scalar wave generators - Consumes watts like a portable computer (operates 8 hours a day)
Also refrigerator, chest freezer, propane hot water and cooking, no natural gas.
Prescott has a very mild summer. We are at 5250 foot elevation. Doors open, maybe a fan a few times a year.
Winter and nights can be cold, so on a down situation it is Mr. Heater during the day. We are blanket kind of people at night.
We have LED lights in the house with 12VDC lights for back up of grid down.
The reason for two mirrored systems, each with 3.5kwh battery, Powerwall, and now 4 - 270 watt 24 volt panel arrays. In normal situation to handles the medical needs and in a grid down situation medical is st priority (nothing else matters - refrigerator food can be replaced). If one of the mirrored system has a 100% catastrophic failure (no panels or battery to redeployed) during a grid down situation supplement with propane generator for medical equipment support and fast charge the battery. We never let the propane level get below 60%.
Both system operating have the potential of producing 7kw each, and storing up to 7kwh total. Current treatment protocol is stagered throughout the day (matches what would be peak solar production period). So the big watt consumption would be during day and freezer and refrigerator, light would be the drain at night unless we were running the oxygen generator for a bad situation. Does any of this make sense?