Comment by 27183
1 day ago
Generally a propane generator is a wiser, more reliable backup option. Propane doesn't go bad, and in disaster scenarios often the sun isn't shining or your solar panels could be damaged. Solar + battery is a good system when the weather is good and everything is going well, but for a fallback system a propane generator can't be beat.
Yeah, this is where I landed, too. Except propane bottles only get me about 3-4 hours per bottle and it's pricey. It ran $50 for one day of AC during the last outage.
I just bought a kit to convert to natural gas though. Most people who've done it are happy to not change bottles all the time. It won't help after an earthquake but the regular PSPS outages I get make natural gas a better fit for the moment.
Not everyone lives somewhere with natural gas service, and gas service could also go out in some types of disasters.
It’s possible to get larger propane tanks and refill them more cheaply (rather than exchanging expensive grill tanks at the store). Some hardware stores will refill tanks directly. You can even get very large tanks (refilled by a truck that comes to your house) if you want weeks of power on tap. But this is probably overkill for most, unless you’re very remote.
I tried that but services want regular deliveries and aren't interested in refilling emergency tanks. And a tank large enough for decent power backup will be hard to move.
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Im not sure AC is the sort of thing most people are thinking about needing power for in an emergency or disaster scenario, its one of the most power hungry things you can use.
As a person in the deep south where summer temps are over 100F and RH is in the 80s, having a generator powered window unit in our smallest room is more necessary than even the fridge. Thankfully the window units only pull 400-500w or so, so even a small dual-fuel running propane would run all day on a 20lb tank.
This is a common enough occurrence in rural Louisiana, at least. And I think almost everyone I know has a 200gal or larger propane tank in their yard, specifically for multiday outages. My father-in-law doesn't have a single propane appliance, but he does have a 250gal tank, for his generac.
We don't we have a single 100lb tank, but that will run the little AC for 3 or 4 days.
During the last outage my neighbor had to leave his house because of the temperature. He had a generator running for days (off of the natural gas line) so I thought he was fine, but his old AC wouldn't start so he texted me as he was leaving to stay at a hotel.
This is important enough to me that I researched slow start AC units ~8 years ago when replacing my AC. I learned that almost any heat pump will do, so that's what I have.
In large areas of the US if your AC goes out during the summer you can be dead within a day or two. There's many deaths of elderly people annually when their AC failed and they didn't have the mobility to leave for a cooling center before they passed out.
https://hsph.harvard.edu/news/heat-waves-and-annual-death-ra...
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We got a 500 gal propane tank. Get it topped off every so often, can power two large portables and one built in generator for longer than we've ever needed, even close to it.
I'm looking into getting a large EV so I can move off of a propane generator. A generator needs service, it will cut power for 5-10 seconds while it starts up (so your PCs and whatnot will power cycle), and it's loud.
Always a good idea to have a UPS, even if you don’t have a generator, to protect your home computers from transient outages, power flickers, or grid voltage fluctuations.
I live off grid and only have solar because it was cheaper than the wire.
Also, I built it myself so the labor costs aren't included but I am about $8k into a system (4kw of panels, 6kw inverter, 15kwH battery).
I personally wouldn't be able to make vehicle cheaper than having no grid tie. I get that the costs are different once you include labor. Also I am on 40acres so the panel set could be ground mounted.
But to make something commensurable with a propane home-powering generator seems a lot more do-able.
Won't an EV have maintenance costs too? And cost a lot more than a propane generator? And take time to switch over to supply electricity to your house?
The quiter part makes sense, but there are a lot more practical solutions to that too.
You (probably) need a car any way. So the choice isn't between an EV or a propane generator - it's between an EV, or (propane generator and a car). With V2H and something like a power wall or other battery backup, when the power goes out you would still have a few hours at normal usage where you can go and plug your car in.
I'm running an EG4 system with a decent amount of battery storage. I have a generator port on it that makes it easy to plug in a portable generator to assist the PV and charge the battery. It's really easy for me to roll my generator over and run it a few hours a day to supplement the solar. Even a cheap 5kW generator is plenty because it doesn't need to power the house, just provide a continuous charge to the batteries.
Wouldn’t a diesel or gasoline generator be better? You can carry both in a bucket found on the side of the road which isn’t possible with propane.
A diesel generator would definitely be better on paper, but the costs involved are much higher as those are generally a permanent install. A gasoline generator requires much more maintenance around fuel and the carburetor as gasoline goes bad over time and modern gas/petrol with ethanol in it sucks up water from the air. A propane generator, while it is a bit more annoying to refuel, especially if you upgrade to larger tanks, is perfectly happy to sit for 6-12 months unused and then start right up on the tank of fuel that's been sitting next to it for that time period.
A propane generator is a temporary solution but likely is good enough for most folks who just need to keep the fridge cold and maybe charge cell phones. It's not going to be able to run your house AC or anything, though.