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frontpage Posted by Texfinn • Jun 18, 2023
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frontpage Posted by Texfinn • Jun 18, 2023

Costco Members: Firman 7500W Running / 9400W Peak Tri Fuel Generator

(Select Stores, In-Store Only)

$700

$1,000

30% off
Costco Wholesale
88 Comments 46,551 Views
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Deal Details
Select Costco Stores (link for reference) has for their Members: Firman 7500W Running / 9400W Peak Tri Fuel Generator on sale for $699. Offer is valid In-Store Only at Select Locations.

Thanks community member Texfinn for sharing this deal

Note, Offer is valid In-Store only at Select Locations. You must be an active Costco Member to purchase In-Store.

About this Product:
  • Runs on Gasoline, Propane Fuel or Natural Gas
  • 9400 Starting Watts / 7500 Running Watts - Gasoline
  • 8450 Starting Watts / 6750 Running Watts - LPG
  • 6900 Starting Watts / 5500 Running Watts - Natural Gas
  • CO Alert System (Carbon Monoxide Warning and Shutdown)

Editor's Notes

Written by slickdewmaster | Staff

Original Post

Written by Texfinn
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Select Costco Stores (link for reference) has for their Members: Firman 7500W Running / 9400W Peak Tri Fuel Generator on sale for $699. Offer is valid In-Store Only at Select Locations.

Thanks community member Texfinn for sharing this deal

Note, Offer is valid In-Store only at Select Locations. You must be an active Costco Member to purchase In-Store.

About this Product:
  • Runs on Gasoline, Propane Fuel or Natural Gas
  • 9400 Starting Watts / 7500 Running Watts - Gasoline
  • 8450 Starting Watts / 6750 Running Watts - LPG
  • 6900 Starting Watts / 5500 Running Watts - Natural Gas
  • CO Alert System (Carbon Monoxide Warning and Shutdown)

Editor's Notes

Written by slickdewmaster | Staff

Original Post

Written by Texfinn

Community Voting

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Top Comments

sctrojan26
Chemical engineer in the oil industry here.

Nat gas is mostly methane (c1) and some ethane (c2). While it may be filtered as well the correct term for the seperation is distillation.

Propane is well propane (C3). Yes propane has a higher energy density.

As a general rule the more C's the higher energy density. But the less clean the burn. Also the more Cs the easier it is to liquefy. There are pros and cons to that as in some cases you want liquid others you want gas.
jasonvr
I was redoing my entire electrical panel at the same time. Generator backfeeds into a breaker on the panel powering the entire house. I have a physical interlock on the panel that allows either the main breaker or the generator breaker to be on, but never both at the same time. No transfer switch needed. Generator only gets hooked up when needed
jasonvr
Last I checked LPG, natural gas, and gasoline are all different chemical compositions and hence different fuels.... Yes two are in gaseous form at everyday temperatures, but it doesn't make them the same fuel

87 Comments

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Jun 18, 2023
698 Posts
Joined Jan 2014
Jun 18, 2023
jasonvr
Jun 18, 2023
698 Posts
Great generator. Good price. Same as I bought it for last year about this time. Can run my entire house including central AC (with a soft start) on natural gas. Did have to remove the bonding on the chassis to be safe. UPS that runs the network closer wasn't particularly happy with the power for some reason though. Never got around to figuring that one out
Jun 18, 2023
79 Posts
Joined Nov 2015
Jun 18, 2023
robluft
Jun 18, 2023
79 Posts
Quote from jasonvr :
Great generator. Good price. Same as I bought it for last year about this time. Can run my entire house including central AC (with a soft start) on natural gas. Did have to remove the bonding on the chassis to be safe. UPS that runs the network closer wasn't particularly happy with the power for some reason though. Never got around to figuring that one out
Depending on what's causing your UPS to have a fit, and what's UPS you've got, adjusting the UPS settings may help. I've know some that did this because the gen output voltage was going slightly out of UPS's default alarm range.
1
Jun 18, 2023
698 Posts
Joined Jan 2014
Jun 18, 2023
jasonvr
Jun 18, 2023
698 Posts
Quote from robluft :
Depending on what's causing your UPS to have a fit, and what's UPS you've got, adjusting the UPS settings may help. I've know some that did this because the gen output voltage was going slightly out of UPS's default alarm range.
It's unfortunately a pretty cheap cyberpower and I don't think it has any adjustments. I saw others messing with the frequency on the generator itself to clear up some issues. I just never got to it.
Jun 18, 2023
187 Posts
Joined Mar 2019

This comment has been rated as unhelpful by Slickdeals users.

Jun 19, 2023
268 Posts
Joined Jun 2005
Jun 19, 2023
sdkjr
Jun 19, 2023
268 Posts
Quote from jasonvr :
Great generator. Good price. Same as I bought it for last year about this time. Can run my entire house including central AC (with a soft start) on natural gas. Did have to remove the bonding on the chassis to be safe. UPS that runs the network closer wasn't particularly happy with the power for some reason though. Never got around to figuring that one out
Are you using the 50amp out of the generator to an inlet for an interlock switch on the panel? I'm looking to add a soft start to my AC and would be curious if the 50 amp out is enough (the manual says it would be outputting 33amp only).

And can you elaborate more on the chassis bonding you are referring to?
Jun 19, 2023
2,937 Posts
Joined Dec 2012
Jun 19, 2023
pingb
Jun 19, 2023
2,937 Posts
Quote from Be_Kind :
Would it be safe without CO hazard if I run it inside the closed door garage using natural gas? After all my natural gas heater is inside a closed door garage.
Most likely not, it would need to be vented. Not that hard of your a little handy or some imagination. Does your heater have a vent?
Jun 19, 2023
698 Posts
Joined Jan 2014
Jun 19, 2023
jasonvr
Jun 19, 2023
698 Posts
Quote from sdkjr :
Are you using the 50amp out of the generator to an inlet for an interlock switch on the panel? I'm looking to add a soft start to my AC and would be curious if the 50 amp out is enough (the manual says it would be outputting 33amp only).

And can you elaborate more on the chassis bonding you are referring to?
Yes, 50 amp out to an inlet on the house tied to a breaker with an interlock to the main breaker

Ground and neutral are bonded on the generator which you don't want if you are plugging it into a house. Ground and neutral should only be tied at the main panel. There's a little disassembly to do to unhook one wire. I found the info online

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Jun 19, 2023
698 Posts
Joined Jan 2014
Jun 19, 2023
jasonvr
Jun 19, 2023
698 Posts
Quote from sdkjr :
Are you using the 50amp out of the generator to an inlet for an interlock switch on the panel? I'm looking to add a soft start to my AC and would be curious if the 50 amp out is enough (the manual says it would be outputting 33amp only).

And can you elaborate more on the chassis bonding you are referring to?
Oh, and I'm NOT using a suicide cord. The cord that comes out of the generator terminates in a female. The house inlet is male
Jun 19, 2023
187 Posts
Joined Mar 2019
Jun 19, 2023
Be_Kind
Jun 19, 2023
187 Posts
Quote from pingb :
Most likely not, it would need to be vented. Not that hard of your a little handy or some imagination. Does your heater have a vent?
Thanks. Yes my heater has a vent and now it makes sense.
Jun 19, 2023
268 Posts
Joined Jun 2005
Jun 19, 2023
sdkjr
Jun 19, 2023
268 Posts
Quote from jasonvr :
Oh, and I'm NOT using a suicide cord. The cord that comes out of the generator terminates in a female. The house inlet is male
Yep I have the inlet, interlock and real cord meant for this. Just hasn't thought about getting my AC working off the generator via natural gas on the 50amp or even the grounding/neutral item. I will have to look into that
Jun 19, 2023
502 Posts
Joined Jan 2009
Jun 19, 2023
Finheaven3
Jun 19, 2023
502 Posts
Quote from jasonvr :
Great generator. Good price. Same as I bought it for last year about this time. Can run my entire house including central AC (with a soft start) on natural gas. Did have to remove the bonding on the chassis to be safe. UPS that runs the network closer wasn't particularly happy with the power for some reason though. Never got around to figuring that one out
How does it run your central AC? Do you need an electrician to install a transfer switch?
Jun 19, 2023
698 Posts
Joined Jan 2014
Jun 19, 2023
jasonvr
Jun 19, 2023
698 Posts

Our community has rated this post as helpful. If you agree, why not thank jasonvr

Quote from Finheaven3 :
How does it run your central AC? Do you need an electrician to install a transfer switch?
I was redoing my entire electrical panel at the same time. Generator backfeeds into a breaker on the panel powering the entire house. I have a physical interlock on the panel that allows either the main breaker or the generator breaker to be on, but never both at the same time. No transfer switch needed. Generator only gets hooked up when needed
3
Jun 19, 2023
10,838 Posts
Joined Aug 2010
Jun 19, 2023
J03
Jun 19, 2023
10,838 Posts
Can anyone who lives in a hurricane prone area chime in on what they use? I recently moved to one so this idea of potentially needing backup power for more than several hours is new to me. At $699, this seems like a great deal for what you get but thinking from a practical standpoint. I assume I'm going to need to do some electrical work with a transfer switch and the like to properly backfeed the house. If I want to keep it in the garage then I would need to pop another vent hole in the wall next to the one for my natural gas water heater that would sit right above it. That's got me thinking about if I even need something like this or if I would be better served by a smaller inverter unit that I can just plop outside on my covered patio and run an extension cord to a couple critical appliances and call it a day. Then I go to price those out and see that they're similar to this price on sale and question if that's a dumb thing to do.
Jun 19, 2023
9,329 Posts
Joined Jul 2005
Jun 19, 2023
fourml8r
Jun 19, 2023
9,329 Posts

Our community has rated this post as helpful. If you agree, why not thank fourml8r

Quote from J03 :
Can anyone who lives in a hurricane prone area chime in on what they use? I recently moved to one so this idea of potentially needing backup power for more than several hours is new to me. At $699, this seems like a great deal for what you get but thinking from a practical standpoint. I assume I'm going to need to do some electrical work with a transfer switch and the like to properly backfeed the house. If I want to keep it in the garage then I would need to pop another vent hole in the wall next to the one for my natural gas water heater that would sit right above it. That's got me thinking about if I even need something like this or if I would be better served by a smaller inverter unit that I can just plop outside on my covered patio and run an extension cord to a couple critical appliances and call it a day. Then I go to price those out and see that they're similar to this price on sale and question if that's a dumb thing to do.
don't do a transfer switch, use an interlock kit. its cheaper and more flexible since you can run anything tied to your electric panel.
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Jun 20, 2023
739 Posts
Joined Jun 2022

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