Best Microwave for a Boat: Compact Picks and Power Guide
A microwave is one of the most debated appliances on a cruising boat. On shore power it is a simple convenience. At anchor, it is a big electrical load that your batteries, inverter and wiring all have to handle. Pick the wrong one and you will trip breakers, flatten the battery bank or have a heavy box sliding around the galley in a seaway.
Quick answer: the best microwave for most boats is a compact 0.5 to 0.7 cu ft model with around 700 W of cooking power, mounted securely and fed from shore power, a generator or a pure sine wave inverter of at least 1,500 W. Remember that a 700 W microwave actually draws roughly 1,000 to 1,200 W from the supply, which is around 100 amps from a 12-volt battery bank while it runs.
Do You Need a Microwave on a Boat?
It depends on how you use the boat:
- Liveaboards in a marina get the most out of a microwave; shore power makes it as easy as at home.
- Cruisers at anchor can use one if they have a large lithium or AGM bank, solar or a generator, and an inverter sized for the load. Short bursts (reheating, defrosting) are realistic; long cooking sessions are not.
- Weekend sailors without an inverter or shore power usually do not need one; a good stove and a kettle cover most needs.
A microwave is handy for reheating leftovers, defrosting, steaming vegetables and quick meals in rough weather when you do not want an open flame. It also reduces how long you run the propane stove, which means less heat and moisture in the cabin.
Power Draw: What a Boat Microwave Really Uses
The wattage on the box is the cooking (output) power. The input power, printed on the rating plate on the back, is much higher, because the magnetron is only about 60 to 65 percent efficient. Always size your system from the input figure.
| Cooking power (output) | Typical input power | Approx. DC draw at 12 V (incl. inverter losses) | Battery used in 5 minutes |
|---|---|---|---|
| 500–600 W | 800–1,000 W | 75–95 A | 6–8 Ah |
| 700 W | 1,000–1,200 W | 95–115 A | 8–10 Ah |
| 900–1,000 W | 1,300–1,500 W | 125–145 A | 10–12 Ah |
| 1,200 W | 1,700–1,900 W | 160–180 A | 13–15 Ah |
These are rough estimates; check the input rating of the model you buy. The takeaway: a few minutes of microwave use is quite affordable for a healthy battery bank, but the instantaneous current is very high. Your batteries, cables, fuse and inverter all have to handle it.
Choosing an inverter for a microwave
- Size: pick an inverter with a continuous rating comfortably above the microwave input power. For a 700 W microwave, 1,500 W continuous is a sensible minimum; 2,000 W gives headroom for other loads.
- Pure sine wave: microwaves can run hot, noisy and less efficiently on modified sine wave inverters, and some electronic controls misbehave. A pure sine wave inverter is the safe choice.
- Battery bank: lithium (LiFePO4) banks handle 100+ amp loads with little voltage drop; lead-acid and AGM banks sag more under heavy loads, and the inverter may shut off on low voltage if the bank is small or partly discharged.
- Cabling and fusing: use heavy cables kept short between battery and inverter, with a correctly rated fuse or breaker close to the battery. If you are not confident with high-current DC wiring, have a marine electrician (ABYC-trained in the US) install it.
- AC safety: the inverter output should feed a properly wired AC circuit with a GFCI/RCD, not an extension cord draped through the cabin.
If you are building up your charging setup, see our guides on how to charge a sailboat battery and the best boat generators.
Marine Microwaves vs Household Compact Microwaves
Dedicated marine and RV microwaves exist, usually built for flush mounting with a trim kit, sometimes with a stainless case and lower-wattage options. They cost more and the choice is limited. Most cruisers use a compact household countertop microwave instead, which is fine as long as you:
- Match the voltage to your boat: 120 V in North America, 230 V in Europe and most other regions.
- Choose a small, light unit that fits the galley and leaves space around the vents.
- Secure it properly (see below) and keep it away from spray and the stove.
- Accept that salt air shortens appliance life; wipe it down and keep it dry.
Mounting and Securing a Microwave on a Boat
A microwave weighs 20 to 30 lb and will become a projectile in a knockdown or a big wave. Plan the installation before you buy:
- Measure the space including clearance for ventilation at the sides, top and back (check the manual).
- Use a fixed shelf or cabinet with a lip or fiddle, plus straps or brackets that hold the case down. Some sailors build a fitted box with a front bar.
- Keep it low and central where possible, away from the stove flame and from spray through the companionway.
- Secure the turntable or remove it when sailing; glass trays break easily.
- Do not block vents; microwaves need airflow and overheat in tight cabinets.
Best Microwaves for Boats
These are compact models that suit boat galleys. Specifications can change between production runs, so always check dimensions, voltage and input power on the listing before you buy, and check current availability.
| Model | Capacity | Cooking power | Voltage | Best for |
|---|---|---|---|---|
| BLACK+DECKER EM720CB7 | 0.7 cu ft | 700 W | 120 V | Budget all-rounder |
| Farberware FMO07AHTBKJ | 0.7 cu ft | 700 W | 120 V | Compact with child lock |
| Muave small microwave | Compact | Low wattage | 120 V | Small galleys |
| Whirlpool 0.5 cu ft countertop | 0.5 cu ft | Low wattage | 120 V | Smallest spaces |
| Cuisinart CMW-70 | 0.7 cu ft | 700 W | 120 V | Stainless styling |
| Emerson MW7302B | 0.7 cu ft | 700 W | 120 V | Low cost |
| Loipart 1200 W | 17 L | 1,200 W | Check spec | Large yachts, commercial use |
| Farberware FMO07ABTBKA | 0.7 cu ft | 700 W | 120 V | Multi-stage cooking |
| Swan Nordic SM22036 | 20 L | 800 W | 230 V | UK and European boats |
1. BLACK+DECKER EM720CB7 0.7 cu ft Digital Microwave
BLACK+DECKER EM720CB7 0.7 cu ft Digital Microwave is a popular, inexpensive compact model with 700 W of cooking power, 10 power levels, preset buttons and a removable turntable. Its footprint (roughly 17 x 13 x 10 inches) fits many galley shelves.
Pros: low price, simple controls, modest power draw for an inverter. Cons: household build, so keep it dry and secure.
2. Farberware Classic FMO07AHTBKJ 0.7 cu ft Microwave
The Farberware Classic FMO07AHTBKJ offers 700 W, 10 power levels and one-touch presets for common foods. A child safety lock is useful on family boats.
Pros: compact, easy to use, child lock. Cons: like all 0.7 cu ft models, it will not take very large plates.
3. Muave Small Microwave Oven 120 V
The Muave small microwave oven is designed to be compact, with large start and stop buttons, a push-button door, 10 power levels and a child lock. This model can be hard to find, so check current availability before planning your galley around it.
Pros: small footprint, simple controls. Cons: limited availability.
4. Whirlpool 0.5 cu ft Countertop Microwave
At 0.5 cu ft, the Whirlpool compact countertop microwave is one of the smallest mainstream microwaves, which makes it attractive for tight galleys and smaller boats. It still takes a dinner plate and has simple touch controls and power levels.
Pros: very small and light, easy to stow. Cons: small cavity; check the input wattage on the rating plate before sizing your inverter.
5. Cuisinart CMW-70 Stainless Steel Microwave
The Cuisinart CMW-70 is a 0.7 cu ft, 700 W microwave with stainless steel styling, presets, memory and two-stage cooking. The clear control panel is easy to read.
Pros: good controls, stainless finish that is easy to wipe down. Cons: stainless finishes still need wiping in salt air to avoid spotting.
6. Emerson MW7302B 0.7 cu ft 700 W Microwave
The Emerson MW7302B is a no-frills 700 W microwave with 10 power levels and preset menus. It is a sensible choice if you want to keep costs down.
Pros: low cost, simple. Cons: basic build quality; check current availability.
7. Loipart 1200 W Microwave Oven
The Loipart 1200 W microwave oven comes from a supplier of commercial marine galley equipment. It is a heavy-duty, professional-style unit with multiple power levels, programmable menus and a stackable design, aimed at larger yachts and vessels with ample generator power. With roughly 1,200 W of cooking power, the input draw is well over 1,500 W, so it is not a match for a typical sailboat inverter.
Pros: commercial-grade build and capacity. Cons: high power draw; check voltage and specifications with the supplier.
8. Farberware Classic FMO07ABTBKA 0.7 cu ft 700 W
Another Farberware option, the Farberware Classic FMO07ABTBKA, offers 700 W, 10 power levels, express cook buttons, time or weight defrost and multi-stage cooking.
Pros: versatile controls, compact. Cons: similar to other 0.7 cu ft models; pick whichever fits your space best.
9. Swan SM22036 Nordic Digital Microwave
For boats wired for 230 V, the Swan Nordic digital microwave is a stylish 20-liter, 800 W model with wood-effect handle details and tactile buttons rather than a touch panel. It comes in several colors.
Pros: 230 V for UK and European boats, easy controls. Cons: larger and higher-wattage than the 0.5 to 0.7 cu ft models; size your inverter accordingly.
How to Choose the Right Microwave for Your Boat
- Check your power source: shore power only, generator, or inverter. If inverter, find the continuous rating and confirm it is pure sine wave.
- Read the input wattage on the rating plate, not just the cooking power.
- Match the voltage (120 V or 230 V) to your boat.
- Measure the space and leave room for ventilation.
- Plan the mounting with straps or a fitted enclosure before installing.
- Prefer simple controls and a stainless or easy-clean finish.
Safety Tips
- Never run a microwave empty; it can damage the magnetron.
- Use only microwave-safe containers, and no metal.
- Keep it on a GFCI/RCD-protected circuit and never use frayed cords or household extension leads in damp areas.
- Turn it off at the breaker when sailing in rough weather if it is not well secured.
- Keep it well away from the stove: microwaves are not designed for heat from a nearby flame, and a gas stove nearby still needs its own ventilation, propane solenoid and carbon monoxide alarm.
For more on galley setup, see our guide to the best marine stoves for sailboats and read our guide on how to cook on a sailboat, and if you are planning for life aboard, see what size sailboat to live on.
Best Microwave for a Boat: Summary
A compact 0.5 to 0.7 cu ft, around 700 W microwave is the best fit for most boats. Size your power system from the input wattage (about 1,000 to 1,200 W), use a pure sine wave inverter of 1,500 W or more with proper cabling and fusing, match the voltage to your boat, and mount it securely with ventilation space. Used in short bursts, a microwave is a practical, flame-free addition to the galley.
