FireCapt: Generator Propane Tank Size

Old 09-30-12, 12:01 PM
Thread Starter
Join Date: Sep 2012
Location: USA
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
FireCapt: Generator Propane Tank Size

I'm wondering about the size of the container indicated by the home standby generator I'm interested in. The instructions dictate that it can be run off a 20 lb propane cylinder.

Anyone know if that matters? I have dual 250 gal propane cylinders and want to run the B&S PowerNow 7KW off them....will this work?

I presume the gas conversion from liquid to gas would be greater in the larger cylinder than the small one so this should not be a problem but now I'm second guessing myself. Any input?
Old 09-30-12, 12:10 PM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 36,608
Upvotes: 0
Received 9 Upvotes on 8 Posts
Welcome to the forums! I don't think the volume in the 20# can will vaporize properly, nor will it give any longevity as to run time.
As you can see from mine, I use a 100# tank, and have a cradle I had my guys build that fits in the back of my truck, so when it needs filling, I just tip it up and take it to the gas place. Gravity helps when putting it back in place.
Old 09-30-12, 01:04 PM
Pendragon's Avatar
Join Date: Jul 2002
Location: USA
Posts: 1,767
Upvotes: 0
Received 2 Upvotes on 2 Posts
A 20# tank has just under 5 gallons of propane in it.
On a small generator it will vaporize just fine. You might get have a day or run time out of it. They do make two to one kits that let you connect two tanks together, and I would recommend that if you are using a 20 or 30# tank.

All that said, if you have a 250g (200g usable) tank available, just use that.
Old 09-30-12, 08:18 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 13,923
Received 177 Upvotes on 155 Posts
Remember that the fuel consumption is determined by the load on the generator. Some gas generators will say so many hours of run time at 50% load.
Old 10-01-12, 09:48 AM
Join Date: Jun 2008
Location: VA.
Posts: 765
Upvotes: 0
Received 1 Upvote on 1 Post
Your generator uses right at 1 gal/hr @ 50% load. So, I would definitely use the bigger tanks.

With those smaller tanks I wouldn't want to worry about getting gas twice a day if you have an extended outage.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: