Consumer Reports

Generac CorePower 5837 generator

Approximate retail price:
Summary: This Generac small stationary generator is natural gas- or propane-powered and is rated for 6,000 (natural gas) and 7,000 (propane) watts. It has:
• electric start
• fuel shutoff
• low-oil shutoff
Dividing line
Community icon6 people have reviewed this model.
Type: Small stationary generators
About - Generac CorePower 5837

The Generac CorePower 5837 is part of the generator test program at Consumer Reports. In our lab tests, generator models like the CorePower 5837 are rated on multiple criteria, such as those listed below.

Power delivery:
How much wattage models delivered and how well they handled surges in power demand over various loads.

Power quality:
A generator's ability to deliver power smoothly, with consistent voltage.

Measured at 23 and 50 feet from the generator. We recommend hearing protection for standing close by the unit while it's running.
Features & Specs - Generac CorePower 5837
info Claimed output (watts) NG 6000 LPG 7000
info Fuel type LPG/NG
info Weight (lbs.) NA
info Fuel shutoff Yes
info Low-oil shutoff Yes
info Electric start Yes
info Fuel gauge NA
More features and specs
User Reviews - Generac CorePower 5837
User Reviews
Already own it? Write a review
Don't Buy This Unit
Low Cost
low wattage
Small Footprint
Engine Blew
High Oil Use On Orig Eng
Best Uses
In Feb 2011, we had a Generac Guardian 10kw installed on our house and a Generac CorePower 5837 7kw installed on our pumphouse. The engine in the 5837 blew up in summer 2014. We had needed to add oil throughout its life, but there was no unusual smoking. The engine was replaced in Sep 2014, but now the unit is not working because of an RPM Sensor Loss error light. The authorized Generac dealer is not able to find the cause of the problem even after contacting Generac. Yes, it's the bottom of the line unit, but it is an unreliable power backup solution.
How long have you owned it:
More than six months
Bottom Line
No, I would not recommend this to a friend.
(2 of 2 customers found this review helpful)
Happy So Far
Best Uses
Used on Propane to backup Well pump, Furnace, Bedroom, Garage Door, Fridge, Range (Gas), and TWO Sump Pumps.<br />Worry free sump pumping when I'm away. Already saved me twice from flooding during power outages.<br />Generac oil filter is stupidly expensive. Found a couple of Amsoil filters (Ea15K10, EaO38) that work.<br />Use synthetic oil and skip the Cold Weather kit.
How long have you owned it:
More than six months
Bottom Line
Yes, I would recommend this to a friend.
(18 of 18 customers found this review helpful)
More than met our expectations
Small Footprint
Noisier Than I Thought
Best Uses
Backup Medical Devices
We purchased the 7KW model to back up medical devices needed in the home, to power refrigerator and microwave, to power central furnace, to power everything in master bedroom (including TV) and to power a portable air conditioner sized for MBR. (We live in Texas) We had an electrician install it and set it up with an automatic transfer switch. It self tests every week so we know it is working and when we have lost power the generator kicks on about 10 seconds later. It is a little noisier than I thought it would be although not objectionable. (We live in 50 foot lot patio home community) When we built the house we should have had the gas line sized for this extra capacity because every time the generator self tests the pilot light on our gas fireplace goes out. In all, we paid about $3700 for the whole thing including a portable air conditioner – for us an investment well worth it.
How long have you owned it:
More than six months
Bottom Line
Yes, I would recommend this to a friend.
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