Molly Ayala
Electric lawn mowers are a more environmentally friendly and quieter alternative to traditional gas mowers. They can be corded or battery-powered, and the amp rating of your electric lawn mower is an important specification to consider when purchasing one. The amp rating indicates the power of the mower and helps determine the type of extension cord required. Corded electric mowers typically draw between 6 and 12 amps, while cordless mowers provide an average of 18 amps per hour. The size of your lawn, availability of outlets, and desired convenience will influence your decision between a corded or cordless mower. Additionally, factors such as voltage, wattage, and battery type also play a role in the overall performance and cost of your electric lawn mower.
| Characteristics | Values |
|---|---|
| Amp range for electric corded lawn mowers | 6 to 12 amps |
| Amp range for cordless lawn mowers | 18 amps per hour on average |
| Amp rating | Helps understand the mower's power and wire gauge |
| Amp rating of a typical lawn mower battery | 18Ah |
| Amperage of riding lawn mower batteries | 140 CCA to 300 CCA |
| Amperage, voltage, and CCA | Depends on battery size and type of mower |
| Voltage and amperage | Impacted by the group size of the lead-acid battery |
| Power | The higher the power, the lower the wire gauge number |
| Wattage | 700 to 1500 watts of electricity per hour, with most using around 1000 |
| Watt-hours | Battery voltage multiplied by amp hours |
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What You'll Learn
Corded vs cordless
When it comes to electric mowers, there are two main power sources to choose from: corded or cordless. Each has its own advantages and disadvantages, and the right choice for you will depend on your specific needs and preferences.
Corded electric mowers offer a consistent power source, meaning you'll never have to worry about running out of battery mid-mow. They also tend to be more affordable than cordless options, making them a budget-friendly choice. However, one of the main drawbacks of corded mowers is their limited range. The length of the power cord can restrict your movement and may not be suitable for larger yards or yards with obstacles. Additionally, you'll need to be mindful of the cord at all times to avoid accidentally cutting it with the mower.
On the other hand, cordless electric mowers provide greater freedom of movement. Without the restriction of a power cord, you can easily manoeuvre around obstacles and mow yards of any size. Cordless mowers are also safer than their corded counterparts, as there is no risk of electric shock from accidentally cutting the cord. However, cordless mowers rely on batteries that need to be recharged, and the runtime per charge can vary depending on the battery's voltage and amp-hour rating. While some batteries offer a runtime of 45-60 minutes, others may need to be replaced more frequently.
When it comes to power, both corded and cordless electric mowers can offer sufficient performance for most yards. Corded mowers typically draw a maximum of 13 amps of power, while cordless mowers with higher voltage batteries can provide increased power. However, other factors such as deck and blade design, yard size and shape, and grass thickness also play a role in the mower's overall performance.
In terms of specific amp recommendations, electric mowers typically range from 13 amps for corded models to 40V or more for cordless models. For example, a 40V 5Ah battery on a cordless electric mower can provide a runtime of approximately 40-60 minutes. Ultimately, the decision between corded and cordless comes down to your personal preferences, yard size, access to outlets, and budget.
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Amperage and wattage
Electric lawn mowers can be corded or cordless, and the type of power source impacts the amperage and wattage requirements. Corded electric lawn mowers typically draw between 6 and 12 amps from a standard outlet, with 15 amps being the maximum allowed by US regulation. However, electric mowers rarely exceed 13 amps to avoid constantly tripping breakers. On the other hand, cordless mowers have batteries that provide an average of 18 amps per hour, with a range of 140 CCA to 300 CCA for riding lawn mowers.
The amperage and wattage requirements of an electric lawn mower depend on various factors, including the size of the lawn, the thickness of the grass, and the presence of inclines. For larger lawns, a wider cutting width is recommended to cover more ground with each pass, which may require a higher amperage and wattage. Thicker grass and inclines can also increase the power demands on the mower.
When selecting an electric lawn mower, it is essential to consider the voltage and amperage of the battery. While voltage influences the power output, amperage determines the amount of work the tool can perform. Lithium-ion batteries, for example, can provide the same energy density as lead-acid batteries with a smaller physical size, resulting in superior performance and environmental sustainability.
Additionally, the distance from the power outlet and the length of the extension cord can impact the amperage requirements. A longer cord or greater distance will require a lower wire gauge number to accommodate the higher power demands and ensure proper functioning of the mower. Therefore, when choosing an electric lawn mower, it is crucial to consider the interplay between amperage, wattage, voltage, and battery capacity to ensure optimal performance and energy efficiency.
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Battery type
Battery-powered lawn mowers are a convenient option for those without access to an outlet or who want to avoid dragging a cord through their yard. They are also a safer choice for mowing around water sources.
When it comes to choosing a battery type, there are several options available, each with its own advantages and disadvantages. Here are some of the most common battery types for electric lawn mowers:
Lead-Acid Batteries
Lead-acid batteries have traditionally been the most popular choice for lawn mowers. They are still widely used, especially in lawn tractors and riding mowers, due to their ability to deliver high power. They are also more affordable than lithium batteries. Lead-acid batteries can be separated into two categories: sealed and flooded. Sealed lead-acid batteries require minimal maintenance, while flooded batteries need regular maintenance to monitor electrolyte levels and provide proper ventilation. However, lead-acid batteries are relatively heavy, have a shorter life cycle, and require extensive maintenance compared to other options.
Lithium-Ion Batteries
Lithium-ion batteries are becoming the preferred choice for lawn mowers due to their environmental sustainability, greater energy capacity, superior performance, and smaller physical dimensions compared to lead-acid batteries. They are also more lightweight and environmentally friendly, with a longer life cycle. However, lithium-ion batteries tend to be more expensive than lead-acid options.
Lithium Iron Phosphate Batteries (LiFePO4)
Lithium iron phosphate batteries offer superior performance, a longer life cycle, and greater energy capacity compared to lithium-ion batteries. They are also lighter and more environmentally friendly due to their reduced heavy metal content. These batteries are often used in remote control lawn mowers and are considered the best option by some manufacturers. However, they come at a higher price point than lithium-ion and lead-acid batteries.
Cold Cranking Amps (CCA)
When considering battery options, it is important to understand the CCA rating, especially if you live in a cold climate. The CCA measures the battery's ability to start the engine at cold temperatures, specifically how many amps a fully charged battery can deliver at 0°F for 30 seconds at a consistent voltage. A higher CCA rating indicates better performance in cold weather.
Voltage Considerations
In addition to battery type, voltage is another critical factor in choosing the right battery for your lawn mower. Voltage ranges vary depending on the size of the lawn and the power required. Lower voltages (below 40V) are ideal for small to medium-sized residential lawns, while higher voltages (40V to 60V) are better suited for commercial or larger lawns. The most common voltage for lawn mower batteries is 12 volts, but you can also find options ranging from 20V to 80V.
In summary, when choosing a battery type for your electric lawn mower, consider the pros and cons of lead-acid, lithium-ion, and lithium iron phosphate batteries, as well as the CCA rating and voltage that best suit your lawn size and power requirements.
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Voltage
The voltage of a lawn mower battery can vary depending on the model and type, with the most common voltage range falling between 12 to 14 volts for most batteries. These 12-volt batteries are the most popular and are typically used for regular push mowers or small riding mowers as they provide sufficient power to start the engine and operate the cutting blades.
The amperage of riding lawn mower batteries tends to range between 140 CCA (Cold Cranking Amps) to 300 CCA. CCA measures the battery's ability to start the engine in cold temperatures, specifically how many amps a fully charged battery can deliver at 0°F for 30 seconds at a consistent voltage.
When choosing between a corded and battery-electric mower, it is important to consider the size of your yard, access to outlets, and overall convenience. Corded mowers can draw a maximum of 15 amps and 1800 watts from a standard outlet due to US regulations, but they typically top out at 13 amps to avoid constantly tripping breakers. On the other hand, battery-driven mowers offer the convenience of not having to deal with cords, making them a safer option around water sources like pools.
While there is no definitive rule, higher-voltage, lower-amp tools are generally capable of more power. However, there are variables outside of voltage and current that can impact performance, such as the deck and blade design, the size and shape of the lawn, and the thickness of the grass.
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Mower size
The size of your lawn mower matters. Choosing the right size not only improves efficiency but also reduces fatigue during use. The size and style of the mower you need depend on the size and shape of your lawn.
If you have a flat yard with minimal trees, your choice of lawn mower is simpler than if you have a sloped or complicated landscape. For a flat yard, a standard lawn mower with a 20-inch deck is a good option, as it balances cutting speed and maneuverability. A compact push mower is also a good choice for a flat yard, as it is simple to handle and store.
For a sloped or complicated landscape, the gradient dictates the transmission choice. Lawn mowers with narrow decks can maneuver tight spaces but may need multiple passes in broad areas. Mowers with large decks can cover hilly terrain, but you must account for levelling kits or floating decks. If you have raised flower beds, root-filled sections, or complex fence lines, choose a mower size that integrates well with the terrain.
If you have limited time, a bigger cutting deck paired with sufficient horsepower can decrease mowing frequency and session length. A larger deck will cover more ground per pass but will add weight and complexity to the operation. A 48-inch deck can handle many acres, assuming the engine of the lawn mower provides enough torque to keep blade tip speed. Oversizing can cause inefficient fuel burn and uneven cutting if the engine can't keep up.
In addition to the size of your lawn, you should also consider the type of grass you have. If you have thick grass, you will need a mower with a longer runtime, as it will pull more power.
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Frequently asked questions
Amp or amperage is the unit of measurement for electric current. It determines the amount of power drawn from an outlet by an electric mower. The higher the amp rating, the more powerful the mower and the lower the wire gauge number required.
Electric corded lawn mowers typically draw between 6 and 12 amps from a standard outlet. Cordless mowers, on the other hand, provide around 18 amps per hour on average.
The power of an electric mower is determined by the interaction of volts, watts, and amps. Watts (or power) can be calculated by multiplying volts (or voltage) by amps.
In addition to amps, consider the size of your yard, access to power outlets, and the overall convenience you desire. If you have a large yard, a corded mower may not be suitable due to the limitations of electric cords. Also, consider the deck and blade design, as they impact performance.
Popular electric mower models include the Greenworks 21-inch 13 Amp corded mower and the EGO 56V 10Ah cordless mower. The Greenworks model is suitable for larger lawns, while the EGO model is a good choice for smaller spaces and offers extended runtime.
