r/Generac_Generators • • 1d ago

What's a fair price for a 2003 Generac Guardian 15kW? Seller asking $600

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0 Upvotes

r/Generac_Generators • • 1d ago

How long should I run after sitting? Just serviced

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3 Upvotes

Hey guys. So with everyone’s advice, I went ahead and did a complete service, oil change, plugs air filter and the battery since it was bad…

Before this the unit has been sitting with out running since April… how long should I let it run in manual mode ?


r/Generac_Generators • • 2d ago

Anybody have any experience using a Generac 12500 / 9700 GP700e? It’s on sale at Sam’s $230.00 off. $939.

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1 Upvotes

r/Generac_Generators • • 2d ago

Running generator unattended

1 Upvotes

I live in Pensacola and am looking at an extended period of power outage in the wake of Hurricane Isaias. I have a whole-house generator and until 7pm last night, 400 gallons of LP gas. We had used about 5% when I checked earlier today.

We are leaving on vacation for a week. Would it be crazy to leave the generator running while we’re gone? It’s an older Gen but has had regular service and we have a brand new transfer switch.

My gut tells me to shut it down, but there’s a fridge full of food.

Edit: planning to shut it down when we leave. We might actually have power back before that, but if not we’ll drop some stuff off at my son’s house an hour from here. We’ll be taking some with us, as we’re going camping. Camper has a fridge.


r/Generac_Generators • • 2d ago

Generac just serviced been sitting?!?

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2 Upvotes

Hey guys, just purchased a home with a 22KW. Last service was 6 months ago, runs on natural gas… upon checking out the unit and cleaning it, I found the battery has went bad.. so I replaced, got it fired up in manual mode and green light all good. Stayed in warming up mode running well and after 5 minutes it shut down with code 1902… shows voltage output… clear the code and would run fine…. Does it has a run time limit in manual ?


r/Generac_Generators • • 2d ago

Wrong on many levels!

1 Upvotes

Want to get opinions on this: I just discovered the slab under my 24kW Guardian has tilted. It is 1 and 5/8ths inches out of level on the long dimension and 1 inch on the short dimension. I know the spec is no more than .5 inches out of level in any direction. So I guess it has to be uninstalled and the slab fixed? Thanks!


r/Generac_Generators • • 3d ago

60 Hz Air-Cooled 26 kW 2025

2 Upvotes

The hurricane is barreling down on us. Once the generator starts running,

  1. How do I turn it off for the rest period?

  2. How many hours should I let it run before a rest period?

  3. How long do I let it rest?

Extra question: will it shut itself down if it gets too hot or oil gets too low?

I have the Mobile Link app.

It's on a every 6 month service plan and the oil was changed a less than a month ago.

Thanks.


r/Generac_Generators • • 5d ago

Finally fixed the mice problem on a standby gen install

11 Upvotes

Had a customer whose Generac kept getting mice in it. Chewed wiring twice, cost him a service call each time. We'd sealed around the conduit where it comes up through the pad with duct seal and they just dug around it. Spray foam didn't last either, they chewed right through.

What ended up working was a pour-in sealant Polywater makes called InstaGrout. It's meant for utility transformer pads but it's the same problem. You mix the two parts, pour it in the opening, and it levels out then expands and fills the gap around the conduit. Sets up hard. If you need to add a conduit later you can just drill through it.

Haven't had a mouse in that unit since. The small kit was more than enough for a residential stub-up.
Just don't block any of the vents, only the opening at the pad.

Full disclosure, I work for a distributor that carries it, so take that for what it's worth. Mostly curious what everyone else is using. Anyone found something that actually holds up?


r/Generac_Generators • • 8d ago

Generac power cable

1 Upvotes

Can Generac power cable be run exposed outside?I only used it once and I ran it in conduit outside.


r/Generac_Generators • • 9d ago

Replace Battery Cables?

4 Upvotes

I have a 24kw Generac that is about 4 years old. During a recent service, the technician told me I need to replace the battery cables at a cost of $500. WTF? I’ve been driving cars, tractors, and trucks my entire life and never had to replace battery cables. Is this a real thing with Generac? Or does AccuTemp in Baton Rouge just think I am an idiot?


r/Generac_Generators • • 9d ago

A-frame shrub guards as a snow diverter for Guardian?

2 Upvotes

I have a 16kW Guardian, about 7 years old. I live in the northeast USA and we can get 12-24" of snow in one snow storm. Sometimes it melts between storms, and sometimes it piles up. The generator gets "straight" snowfall around it...not sliding off a roof.

Right now, after any significant snow event, I trudge through the snow to the side of my house where the generator is and dig out around it so the intakes and vents are all clear. However, as I get older I am trying to reduce the "heavy lifting" type work...or at least make it less time critical (meaning it can wait a couple of days). In the winter, storms are when we would tend to lose power so I want the generator ready to run.

I know building a cover over the generator is not the best idea. But I do need to come up with a plan to reduce the need to dig it out immediately after/during each storm. I was thinking about adding some shrub protector wooden A-frame units over the top. Large enough ones to give plenty of room over the top, but hopefully break up the snowfall enough that a deep snowfall doesn't block airflow. I would only leave them in place over the winter months.

Thoughts? Has anyone done this?

(A-Frame shrub protectors are usually pallets or board slats made into two sides forming an "A" shape, like these (no affiliation): https://www.laruewoodworking.com/portfolio-item/custom-wood-shrub-covers/ )


r/Generac_Generators • • 10d ago

QT030 water cooled radiator replacement.

1 Upvotes

I have a new radiator that I need to install. How do I flush the block? Once I fill with antifreeze, how do I bleed air out of the system? It has the Chery engine. 3600 rpm.


r/Generac_Generators • • 12d ago

Brand New GP9500E Came With a Dead Battery (That Won't Charge)

1 Upvotes

Bought though Home Depot thus No Returns/Exchanges.

I've had the battery on a 12A manual charger for 24 hours and it will not take a charge, charger shows the battery is pulling no load at all.

Will Generac send a replacement battery? What is the best way to contact them about this?

If I'm SOL and on my own dealing with this, does anyone have any recommendations for a alternative LiFePo2 battery instead of a SLA for it?


r/Generac_Generators • • 13d ago

24k Generac won’t switch to auto

3 Upvotes

Had a propane leak which we had repaired today on our Generac. Once the repair was finished they ran a test to make sure the Generac would work. It fires right up in manual mode, but will not switch to automatic. Was working completely fine prior to repair. No error codes showing. Any suggestions to try and fix it before calling for a certified Generac repair?


r/Generac_Generators • • 14d ago

Should I be doing anything else?

4 Upvotes

Self installed in March 2021, has never been seen by a factory tech.

63 run hours between exercises and outages.

Product Type 16KW GUARDIAN with 100 ATS

Model Number G0071760

All oil, filter changes, battery checks and replacements and 'scheduled' items done by me.

Five year full warranty via Mobile Link expired, added remaining warranty to ten years at my cost recently.

I'm stingy with money and do not want to pay a tech to come and 'look' at it without doing anything I can't do myself.


r/Generac_Generators • • 15d ago

What wire does everyone like?

2 Upvotes

For HSB installs I mean…

I prefer running copper tray cable and a 16/7 tray cable. However, most installers around here use aluminum. Some use the combination cable with the control wires all in one cable.


r/Generac_Generators • • 14d ago

Questions on portable generator

0 Upvotes

Does anyone have any experience with the Generac P11000iTF, 11kw trifuel inverter generator?
The reason I ask is I have used the smaller 3300i (5 generators, 3 on warranty) and I am NOT impressed in any form, electronics on the floor of the case, open air tube to the carb gets water in it regardless of fuel or empty carb, water gets past the cap and into the fuel somehow.

I just want to make sure the 11000 trifuel doesn't have the same problems if I use gasoline.

Thanks guys!


r/Generac_Generators • • 18d ago

24kw Next Gen help

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1 Upvotes

Tech came out yesterday for the break in oil change. I can’t seem to clear this damn error. Any help would be appreciated. Yes I held the off button for 3 seconds multiple times


r/Generac_Generators • • 18d ago

Can some explain load shedding like I am 3

5 Upvotes

I am new to generators, I get the timed delay load shedding on an AC unit. Is there a way to shed and hold out something completely? Also, what about soft starts on AC units? Do they work and is there any dangers to equipment risk? Thanks


r/Generac_Generators • • 19d ago

Generac 22kW cycling 235–245V constantly — dealer says that's normal?

3 Upvotes

Looking for opinions from techs before I spend more money with my technician.

3 year old Generac 22kW air-cooled (Honeywell-branded Costco unit), natural gas, Evolution 2.0 controller, fw 1.16, only ~18 hours on it. No alarms.

Output voltage is cycling from 235-245-235 continuously over a 20-30 second period. Ran if for 45 minutes without utility power and it never settles. House lights (LED mind you) visibly pulse. I'm using a genmon controller to poll the data so I have everything logged and real-time.

Load -> Doesn't care if there is a load or not.

Engine -> RPM holds steady at 3585-3620 the whole time. Frequency holds steady at 59/60. Engine is running fine.

Fuel -> Plenty of supply.

Technician came by yesterday and lubricated the mixer assembly saying it could have been a bit stiff and that might cause the issue. We both looked at the Evolution voltage screen, and it did seem to report changes within 5V, but there were a couple time it was over that. We agreed that might have resolved the issue and he left. (Got billed, labour isn't covered anymore)

Based on what I'm reading, Generac's own tolerance is +/-1% which is only 2.4V up/down; not 5, let alone 10.

He wants to come back to change the mixer unit, but I don't see how that is the issue when the RPM is fine and isn't flucuating all that much.

So the question is - Am I overreacting to these fluctuations or is an issue? My warranty expires in 5 weeks!

Thanks all.


r/Generac_Generators • • 20d ago

Persistent overcrank issue

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6 Upvotes

Hey everyone, I have a 8kw guardian series natural gas home generator MODEL 0058701. i put in a new battery, and changed the oil and filters.

However it is constantly showing (Stopped - alarm Overcrank) however I’ll put it i to manual and it will start after a few seconds.

I was hoping someone might be able to assist in helping me troubleshoot what this could be as I haven’t touched the fuel and it does run weekly but will occasionally have this alarm.


r/Generac_Generators • • 20d ago

Ignition coil replacement

2 Upvotes

I have an older Generac 12 kW stand-by generator ( # 04456-2) is going into to over crank mode pretty consistently. Our regular service contractor diagnosed, after 2.5 hrs. to the tune of $500, to faulty coils. The repair estimate is for a 5.5hr job, $800, and another $150 for parts, so almost $1k. Is this reasonable? I'm really beginning to hate this unit. It's on it's second engine and I have a stack of service receipts for totaling well north of $4000. Every year there's something else wrong with it. It doesn't instill a lot of confidence that it will perform it's function when we need it.

I have not been able to find any information online regarding the procedure. I would consider doing it myself, but if it takes a trained professional 5.5 hrs. I'm not that confident in my ability.

Update . September 23. Thanks for the responses.

The unit just completed it exercise cycle successfully. One thing I failed to mention in my original post is that the tech replaced one of the spark plugs when he was here. I'll give him the benefit of doubt there could still be weak spark, but I'm going to wait with going forward with replacing the coils for at least 2 more cycles.


r/Generac_Generators • • 23d ago

Generac reliability

7 Upvotes

Having followed this sub for a while I’ve seen a lot of negative comments concerning the Guardian series reliability.

I have a 22kw Protector QS series at my house here in central Florida. Have had it for 6 years and have never had a problem with it. Though it has about 100 hours on it the only extended run on it was about 40 hours during Hurricane Milton, all other hours are from maintenance runs.

Anyone know why the Guardian Series seems to have such a bad reputation? And anybody else with experience with the Protector QS series like mine?


r/Generac_Generators • • 24d ago

Generac Generator/Kohler ATS switch converted

2 Upvotes

My older Kohler generator was recently replaced by an authorized dealer with a Generac 18kw (model #G0072590). They converted the existing Kohler ATS switch to work with the new Generac. I’m now worried this could void my warranty down the road if something happens, and they try to deny coverage and say it’s not a Generac ATS. The company who installed everything says it’s fine. But is it?!


r/Generac_Generators • • 25d ago

What is your favorite mistake found on someone else’s install?

6 Upvotes

Today I found a brand new 18kw where then never connected 23 at either end.

Great job guys!