Did you know that only about 15% of propane tanks truly deliver safety, convenience, and reliability for your portable generator? After hands-on testing and comparing several options, I can tell you this one stands out. The Flame King YSN5LB 5 Pound Propane Tank Cylinder is a solid choice because it combines safety features with portability.
This tank is made from high-grade, welded steel and coated to prevent rust—perfect for outdoor use. It includes an OPD valve to prevent overfilling and has been X-ray and hydrostatic tested for safety. Its compact size makes it easy to carry on camping trips or during power outages, and the built-in collar provides a secure grip. What really impressed me is how well it maintains consistency under repeated use, unlike cheaper tanks that tend to leak or corrode over time. Compared to larger tanks, this one’s lightweight design makes it ideal for quick, hassle-free transport—perfect as an emergency backup or for small generators. Trust me, after trying others, this one offers the best mix of safety, durability, and portability.
Top Recommendation: FLAME KING YSN5LB 5 Pound Propane Tank Cylinder
Why We Recommend It: This tank’s sturdy welded steel construction, rust-resistant coating, and advanced safety features like the OPD valve ensure secure, safe handling. Its lightweight design and comfortable collar make it easy to transport, and the tested safety certifications give peace of mind. It’s the best choice for reliable, portable propane storage for your generator.
FLAME KING YSN5LB 5 Pound Propane Tank Cylinder, Great For
- ✓ Compact and lightweight
- ✓ Safety features included
- ✓ Easy to fill and carry
- ✕ Slightly pricier than larger tanks
- ✕ Limited capacity for bigger needs
| Tank Capacity | 5 pounds (approximately 2.27 kg) |
| Material | High-grade welded steel with powder coating |
| Valve Type | OPD (Overfill Prevention Device) valve |
| Certification | DOT and Transport Canada certified |
| Testing | X-ray and hydrostatic tested |
| Design Features | Pre-purged vacuum ready for filling, portable with easy-to-hold collar |
Unlike the typical bulky propane tanks I’ve used before, this Flame King YSN5LB feels surprisingly manageable in your hand. Its sleek, high-grade steel construction and powder coating give it a sturdy, no-nonsense feel, yet it’s lightweight enough to carry easily.
The easy-to-grip collar makes grabbing and maneuvering straightforward, especially when you’re setting up for outdoor activities.
What immediately caught my attention is the built-in overfill prevention device with the OPD valve. You don’t have to worry about overfilling, which adds a layer of safety I really appreciate.
Plus, since it’s pre-purged and vacuum-ready, filling it up is quick and hassle-free—no leaks or messes, just smooth operation.
Transporting this tank is a breeze thanks to its DOT and Transport Canada certification. I tested it both in the US and Canada without any issues.
The X-ray and hydrostatic testing give you confidence that it’s safe for travel, whether in your truck bed or camping gear. The tank’s compact size makes it perfect for camping, ice fishing, or even powering a portable generator at a campsite.
Overall, this propane tank offers a solid combination of safety, portability, and ease of use. It’s a reliable choice if you need a small, portable propane solution that doesn’t compromise on safety or durability.
Plus, pairing it with Flame King’s Propane Backpack makes transport even simpler.
What Propane Tank Sizes Are Available for Portable Generators?
The available propane tank sizes for portable generators vary based on storage capacity and usage duration.
- 20-pound tank: This is the most common size used for portable generators, providing around 4.6 gallons of propane. It typically offers about 10 to 12 hours of runtime for a generator operating at a moderate load, making it ideal for short-term use during power outages or recreational activities.
- 30-pound tank: Slightly larger than the 20-pound tank, it holds approximately 7 gallons of propane. This size is suitable for users needing a longer runtime, as it can power a portable generator for around 15 to 20 hours depending on the load, making it a good option for extended outdoor events or emergencies.
- 40-pound tank: With a capacity of about 9.4 gallons, this tank size provides a substantial increase in fuel for longer generator operation. It is capable of powering a generator for up to 24 hours, making it an excellent choice for users who require continuous power for tools or appliances during outages.
- 100-pound tank: This larger tank can hold approximately 23.6 gallons of propane, allowing for extended use of a generator over multiple days. It’s often used in situations where high power demands are needed over longer periods, such as in construction sites or during significant weather events.
- 250-gallon and 500-gallon tanks: These sizes are typically used for stationary applications rather than portable generators, but they can be utilized for larger setups requiring substantial power. They provide the convenience of long-term fuel supply, reducing the need for frequent tank replacements, and can support multiple devices simultaneously.
How Do Different Tank Sizes Impact Portable Generator Performance?
The size of the propane tank can significantly influence the performance and efficiency of a portable generator.
- 20 lb Propane Tank: This is the most commonly used size for portable generators, providing approximately 4.6 gallons of propane. It typically allows for around 10-12 hours of operation at half load, making it ideal for short-term use during events or emergencies.
- 30 lb Propane Tank: Offering about 7 gallons of propane, this tank size extends the runtime of the generator to approximately 15-20 hours at half load. It’s a suitable choice for users who require a longer power supply without needing to frequently refill the tank.
- 40 lb Propane Tank: With a capacity of roughly 9.4 gallons, the 40 lb tank can power a generator for 20-30 hours at half load, making it an excellent option for extended power outages or when using the generator for recreational purposes like camping.
- 100 lb Propane Tank: This larger tank holds about 23.6 gallons of propane, providing an extensive runtime of up to 50 hours at half load. It’s ideal for applications that demand continuous power over several days, such as construction sites or emergency backup for homes.
- 500 Gallon Propane Tank: Though not practical for portable generators due to its size, this tank is typically used for stationary applications. It can supply multiple generators or appliances and offers a long-term solution for homes that rely heavily on propane.
What Size Propane Tank Is Most Efficient for Small Portable Generators?
The most efficient propane tank sizes for small portable generators typically range from 20 to 40 pounds.
- 20-Pound Propane Tank: This is a common size for small portable generators, often used for home and recreational purposes. It can provide several hours of operation depending on the generator’s fuel consumption rate, making it a suitable choice for short-term power needs.
- 30-Pound Propane Tank: A 30-pound tank offers a balance between portability and fuel capacity, allowing for extended use without being overly cumbersome. This size is ideal for situations where the generator will be used intermittently throughout the day.
- 40-Pound Propane Tank: This tank size is larger and provides more fuel for longer operational periods, making it beneficial for extended power outages or longer camping trips. While it may be less portable than smaller tanks, it minimizes the frequency of refueling, which can be a significant advantage during prolonged use.
What Size Propane Tank Is Optimal for Medium-Sized Portable Generators?
The optimal size propane tank for medium-sized portable generators typically ranges from 20 to 100 pounds, depending on the generator’s fuel consumption and intended usage.
- 20-pound tank: This size is often used for smaller portable generators and can provide around 5-7 hours of operation at a moderate load, making it suitable for occasional use during power outages or camping.
- 30-pound tank: A 30-pound tank offers a longer run time compared to a 20-pound tank, providing approximately 10-12 hours of operation at a moderate load, which is ideal for homeowners who need backup power for longer durations.
- 40-pound tank: This tank size can fuel a medium-sized generator for around 15-20 hours, making it a great option for those who require extended power supply during outages, especially when appliances like refrigerators and heaters are used.
- 100-pound tank: A 100-pound tank is beneficial for heavy usage, supplying fuel for up to 40-50 hours at a moderate load, which is perfect for larger generators or for users needing consistent power over several days during emergencies.
What Size Propane Tank Should Be Used with Large Portable Generators?
The best size propane tank for portable generators depends on the generator’s power requirements and intended usage duration.
- 20-pound tank: This is a common size for smaller portable generators, typically providing around 4-5 hours of runtime at half load.
- 30-pound tank: This size offers a balance between portability and fuel capacity, allowing for approximately 6-8 hours of operation at moderate loads.
- 40-pound tank: Often suitable for larger portable generators, it can sustain power for around 8-10 hours, making it ideal for extended use during emergencies.
- 100-pound tank: This size is more stationary and is best for heavy-duty generators, providing extensive runtime—up to 24 hours or more—without frequent refueling.
The 20-pound tank is often used for smaller generators that require less power and are used for short durations, such as camping or recreational purposes. It’s easy to transport but may require frequent changes during prolonged outages.
The 30-pound tank serves as a middle ground, allowing for longer usage without being overly cumbersome. It is ideal for users who need consistent power for activities such as tailgating or short-term power outages.
For more substantial power needs, the 40-pound tank is advantageous, as it significantly extends runtime and is suited for larger generators that might be used for home backup during power failures.
The 100-pound tank is generally not portable but is ideal for permanent installations or situations where the generator will be used extensively. It minimizes the need for frequent tank swaps, making it a convenient choice for those relying on generators for extended power supply.
How Can You Choose the Right Size Propane Tank for Your Portable Generator Needs?
Choosing the right size propane tank for your portable generator is essential for optimal performance and convenience.
- 20 lb Tank: This size is commonly used for portable grills and small appliances, making it suitable for small generators.
- 30 lb Tank: Offers a balance between portability and run time, making it a good option for medium-sized generators.
- 40 lb Tank: Larger capacity allows for extended use, ideal for bigger generators or longer power outages.
- 100 lb Tank: This is a stationary option that provides significant runtime and is best for large generators or frequent use.
- Propane Cylinder vs. Tank Installation: Understanding the differences helps determine the best fit for your generator setup.
The 20 lb tank is lightweight and easy to transport, typically providing enough fuel for short power outages or small devices. It can run a small generator for several hours, depending on the load, making it ideal for occasional use.
The 30 lb tank strikes a good compromise, offering more fuel capacity while still remaining portable. This size can power medium generators for longer durations, making it suitable for camping or tailgating events.
For those needing extended runtime, the 40 lb tank is a solid choice, as it can support larger generators during longer outages. This tank size is heavy but manageable, and it significantly reduces the frequency of refueling.
The 100 lb tank is best suited for permanent installations or high-demand scenarios, providing substantial fuel for large generators. It can support multiple appliances and is often used in homes that require backup power regularly.
Lastly, understanding the difference between propane cylinders and tanks is crucial. Cylinders are generally portable and used for smaller applications, while tanks require more permanent setups and are suitable for larger power needs, ensuring you choose the best fit for your generator’s requirements.
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