GrantMaya GM300W Review: Best Portable Solar Generator

The GrantMaya GM300W portable generator helps you save a large capacity of power for use in future emergencies at home or abroad. It recharges completely in 7 to 8 hours; Also, it can charge multiple devices at the same time. In addition, it offers excellent protection against overcurrent, overheating, low voltage, overvoltage, short circuit, and overload problems.

Furthermore, GrantMaya GM300W portable AC power bank uses advanced battery management technology to improve battery usage and extend its lifespan. This power bank comes with a portable design and lightweight construction, and the handle also facilitates transportation during an outing. There is no doubt that this is one of the best portable power supplies.

The GrantMaya GM300W portable AC power bank, portable generator, power supply, and powerhouse can apply USB 5V, DC 12V and 110V / 120V AC power to your handset and portable electronic devices.

It is the power solution that is easy to move and use for many households, outdoor and emergency activities. Makes your campsite, tailgating, and other mobile activities more comfortable. In an emergency, it can provide critical backup power.

If you are shopping for a portable power generator that uses solar energy to charge your devices such as GrantMaya GM300W and its competitors, Flashfish G300 and Jackery Explorer 160. Then stick around and read our in-depth GrantMaya GM300W review to find out why this is the best portable solar-powered generator on the market.

Specifications

• Built-in Battery: 100% High Quality 18650 Lithium Battery Packs
• Capacity: 64,800mAh 300W 220Wh / 3.7V High Quality Lithium Batteries

Input Ports:

• Optimal Charging Current: 2.5A
• Optimal Charging Voltage: DC15V
• Charging Connector: DC5.5×2.1mm
• Fully Charged Time: 7~8 hours

Output Ports:

• USB Voltage: 5V (Max Current: 3.1A)
• USB Port: 4pcs
• DC Output Port: 1pc
• AC Output Port: 2pcs
• DC Output Voltage: 12V (Max Current: 10A)
• AC Continuous Output: 300W (Max: 350W).
• Output Voltage frequency: 60Hz
• AC Output Voltage: 110V-120V

In The Box

Inside the package, you should expect to get these following items when ordering a GrantMaya GM300W portable AC power station:

• 1 x Instruction manual
• 1 x 15V 2.5A Power Adapter
• 1 x Portable AC power bank

Performance

For reference, assuming that the power consumption of your device is 50 watts (Max: <300 watts), the working time will be approximately 220wh * 0.85 / 50w = 3.74 hours.

The working time varies according to the power of the product, the larger the Watt devices, the shorter the working time.

Battery Capacity

High-quality 220wh / 64,800mAh lithium batteries. 300-watt pure sine wave AC output.

• Supports USB 4.5v / 3.1a (max) outputs for smartphones, tablets, gps devices, portable game systems, etc.
• Supports 1.9 ~ 12v / 10a dc outputs for a power switch, wheel jack, car wash, vacuum cleaner, air blower.
• Supports 2.120v / 50hz 300w (maximum output power: 600w) AC inverter for all other digital devices such as laptops, home appliances, floor fans, power tools, TVs and exterior lighting.

Power Usage

Easily rechargeable: It can be plugged into any 110v outlet or 12v cigarette lighter or into a boat or car outlet. You can also use solar panels to charge the power pack during the day anywhere. Full recharging via AC or DC power takes only 7 to 8 hours, and the solar charge completes approximately 10 hours.

Durability

If you failed to follow these basic guidelines, you would find that life and performance will gradually decrease faster for most types of portable lithium-ion / lithium polymer (AC) power bank batteries, including inexpensive and affordable AC power banks and even the best AC power bank available.

Because the overall battery life is highly dependent on the operating conditions, it is also difficult to give a clear answer as to their actual life. In good condition, a good GrantMaya portable power bank can last for several years.

Features

All-in-One Control Unit

Two 120V AC sockets (for small devices up to 300W), a 12V DC output, and a cigarette lighter adapter for DC cars and 4 fast-charging USB ports, each up to 3.1A, for charging electronic devices such as tablets or Bluetooth speakers.

Guaranteed Security

Battery management system (BMS) is used to improve battery usage, prevent overcharging, overcurrent, overload, short circuit, undervoltage, overvoltage, and overheating, thus prolonging the battery life.

Huge Capacity Power Source

• iPhone 8 13 Charges
• iPhone 7 18 Charges
• Laptop 70 Watts 2 Hours
• Lamp 5W 35 Hours
• Mini fridge 50W 3.5 Hours

Three Ways to Recharge

• Easy rechargeable by socket, solar panel, car charger by wall charger (included), fully charged for approximately 8 hours.
• By car charger (buy separately). Fully charged for approximately 12 hours with a 12V car charger.
• By solar panel charger (to be purchased separately). Solar panel 30 ~ 100 watts, operating voltage 18 V. Fully charged for approximately 12 hours with 100W solar panel.

Purely Sine Wave

Better than the modified sine wave, a cleaner current between your hands. Prevents computer crashes, reduce noise from fans, TVs, and other devices and is compatible with more speeds.

Travel-Friendly Power Source

It weighs only 2.25 kg. Easier and quieter suitcase design for a traveler.

No Smoke, No Issue

Energy collection by mains plug and sunlight, which does not use gasoline or diesel to produce electricity. The main purpose of camping in nature is to breathe fresh air and enjoy the tranquility of nature.

LED Indicator

4 blue LED battery indicators, 1 green AC indicator, and 1 red LED indicator to keep you informed of the operation of the equipment.

Compact and portable

Ultra-slim (7.88 x 7.88 x 3.1 inches) and light (2.3 kg) size. The portable power bank is not just for emergency power at home but also for camping or when you need power while on the go.

Summary

Go ahead and buy one of the best portable power supplies to meet your needs. After seeing the different types of portable power, we can see that it is very important to us in our daily life. It is reliable and works under different conditions.

The GrantMaya GM300W portable generator is versatile and allows you to select from different types to perfectly match your device. A portable power supply is lightweight and allows you to use it from anywhere with or without power. It is suitable for domestic and outdoor use and meets your energy needs.

So what are you waiting for? Go ahead and get your hands on a brand new GrantMaya GM300W portable power station here to enjoy its great degree of flexibility, delivery of power, and tailoring around your remote trips.

Thank you for reading our in-depth GrantMaya GM300W portable battery generator review. We hope you found our informative review helpful and insightful. Happy outdooring with your new portable power generator!