Tough Grade TG-4 RV Convection Microwave
A Greystone-size convection microwave sold with its trim kit. The missing wattage figures make it harder to plan around an inverter.
Amazon $329.99$329.99
The Tough Grade TG-4 RV Convection Microwave is the better RV microwave overall, rated 3.3 to 3.1. The Tough Grade TG-4 RV Convection Microwave leads on features. The Greystone 1.1 cu ft Convection Microwave costs $23.33 less ($306.66 vs $329.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Greystone 1.1 cu ft Convection Microwave
The Greystone 1.1 cu ft convection built-in, for owners replacing the factory unit like for like.
Amazon $306.66$306.66
Which should you buy?
- Choose the Tough Grade TG-4 RV Convection Microwave for features (convection oven, installs with no extra parts vs convection oven).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every convection & air fry RV microwave; a clear win is highlighted. How we rank explains each one.
| Factor weight | Tough Grade TG-4 RV Convection Microwave | Greystone 1.1 cu ft Convection Microwave |
|---|---|---|
| Overall rating | 3.3/5 | 3.1/5 |
| Value 25% | 42 $299.99 per cu ft ($329.99, 1.1 cu ft) | 49 $278.78 per cu ft ($306.66, 1.1 cu ft) |
| Capacity 15% | 30 1.1 cu ft | 30 1.1 cu ft |
| Cooking power 15% | 50 output wattage not published (neutral score used) | 50 output wattage not published (neutral score used) |
| Input draw 15% | 50 input wattage not published (neutral score used) | 50 input wattage not published (neutral score used) |
| Features 20% | 80 convection oven, installs with no extra parts | 45 convection oven |
| Warranty 10% | 50 1-year warranty | 50 1-year warranty |
Specifications
| Tough Grade TG-4 RV Convection Microwave | Greystone 1.1 cu ft Convection Microwave | |
|---|---|---|
| Cooking | ||
| Mounting | Built-in | Built-in |
| Modes | Microwave, convection | Microwave, convection |
| Capacity | 1.1 cu ft | 1.1 cu ft |
| Power | ||
| Voltage | 120 V AC | 120 V AC |
| Fit | ||
| Outside (W x H x D) | 21 x 11 x 15.8 in | 21 x 11 x 15.8 in |
| Trim kit | Included | Sold separately |
| Size with trim (W x H) | 24.2 x 18.2 in | 24.2 x 18.2 in |
| Weight | 41 lb | 41 lb |
| Support | ||
| Warranty | 1 year | 1 year |