COSMO COS-ERD304K-BK 30 in. Stellar Collection 4.9 cu. ft. Electric Range with 4 Burner…
- Freestanding Range
- 4.9 cu ft
- Knob
- Storage
- Better rated than 75%
A well-liked, straightforward range for buyers who want convection and a modern black finish without paying for smart features, though the lack of self-cleaning is worth weighing.
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How it ranks among the 8 freestanding ranges we track
4.7★ across 10 Amazon ratings, Bayesian-smoothed toward the category average.
10 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 8 freestanding ranges we track - how the scorecard works · full freestanding ranges data report. Confidence: limited - limited rating history.Last refreshed Jun 13, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Cosmo COS-ERD304K-BK is a 30-inch electric range in matte black, pairing a 4-burner glass cooktop with dual-element burners and a 4.9 cu ft convection oven for bake, broil, roast, and defrost.
There is no wifi or smart home layer here, just a straightforward range with convection alongside conventional bake and broil, which several owners specifically appreciated. Safety features include triple-thick oven glass, a cool-to-touch handle, and a ventilation system meant to dissipate heat around the cavity.
- 4-burner black glass cooktop with dual-element front burners
- 4.9 cu ft convection oven with bake, broil, roast, and defrost
- Triple-thick oven glass and cool-to-touch handle for safety
- Matte black finish with a 1-year limited warranty
Who it's for
Buyers wanting a solid, no-frills 30-inch electric range with a modern matte black look and true convection, who do not need app connectivity or a self-cleaning cycle.
What buyers say
From Amazon customer reviews.
Owners describe this range as sleek and modern with genuinely useful dual burner sizing and a convection setting that improved both regular meals and baked desserts. The main gap reviewers point out is the missing self-cleaning feature, which one owner called a small trade-off, and one initial unit arrived damaged before Amazon sent a replacement.
Strengths and trade-offs
Drawn from this product's published specifications.
- Dual-element front burners give large and small ring options
- True convection improved both meals and baking per owners
- Triple-thick oven glass and a cool-to-touch handle
- Simple installation with no smart home setup required
- No self-cleaning oven cycle
- Requires a dedicated 240V, 3-wire or 4-wire circuit not included
- One buyer's initial unit arrived damaged, though replaced quickly
Performance notes
The two front burners each combine a large and small heating element for flexibility between big pots and small pans, while the two rear burners are single elements sized for smaller cookware. The convection fan circulates hot air through the 4.9 cu ft cavity for more even results across bake, broil, roast, and defrost settings than a conventional oven alone.
Specifications
| Brand | Cosmo |
|---|---|
| Model | COS-ERD304K-BK |
| Dimensions & fit | |
| Item Weight | 148.4 pounds |
| Item Dimensions D x W x H | 27.6 × 29.9 × 37 inches |
| Capacity & performance | |
| Capacity | 4.9 cu ft |
| Number of Heating Elements | 4 |
| Heating Element | Radiant |
| Power & efficiency | |
| Voltage | 240 volts |
| Construction & materials | |
| Material Type | Stainless Steel |
| Finish Types | Matte |
| Compatibility & installation | |
| Smart Home Compatibility | Not Smart Home Compatible |
| Included components | |
| Unit Count | 1 |
| Included Components | Rear Vent Trim, Oven Racks, Anti-tip Bracket |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Control Type | Knob |
| Drawer Type | Storage |
| Number Of Racks | 2 |
| Specification Met | ETL |
| Form Factor | Single Oven |
| Item Type Name | 30 in. Stellar Collection 4.9 cu. ft. Electric Range with 4 Burner Glass Cooktop and Convection Oven in Matte Black |
How it compares
This product against the closest alternatives we track in freestanding ranges.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| COSMO COS-ERD304K-BK 30 in. Stellar Collection 4.9 cu. ft. Electric Range with 4 Burner…This product | 4.7 / 5 | 10 | 2.7 / 5 |
| CAMPLUX Classic RV Stove Propane Range 21 InchesCamplux Enjoy Outdoor Life | 4.5 / 5 | 152 | 3.9 / 5 |
| GE 30-Inch Freestanding Gas Range with 4 Sealed BurnersGE | 4.5 / 5 | 26 | 3.9 / 5 |
| AMZCHEF RV Gas Range Stove 12V. Range Oven for RV Use with 3 BurnersAmzchef | 4.3 / 5 | 143 | 3.8 / 5 |
| Summit RE2411W 24" Inch Electric Coil RangeSummit Appliance | 4.0 / 5 | 117 | 3.6 / 5 |
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Questions about the Cosmo COS-ERD304K-BK
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Cosmo COS-ERD304K-BK have wifi or smart controls?
No, per the listing it has no smartphone or wifi connectivity, just conventional and convection bake, broil, roast, and defrost settings.
What electrical circuit does the COS-ERD304K-BK need?
It requires a 240V, 60Hz circuit with 3-wire or 4-wire hookup, and the cord is not included.
Does this Cosmo range self-clean?
No, owners note the lack of a self-cleaning cycle as one of its few drawbacks.