What Can a 300-Watt Solar Generator Run?

Solar Generators are an awesome option when you want to power your devices at home or outdoors. With a solar generator, you won’t have to worry about your devices running out of power as the power station offers an amazing backup solution. The fact that you can use solar energy to recharge it is another plus as solar is a clean source of energy available everywhere.  

But apart from charging your devices, what can a 300-watt solar generator power? We answer this question plus and give options to look into when picking a solar generator. 

What can a 300 Watt Solar Generator Run? 

First of all, you should understand that the 300 Watt is the inverter rating. This wattage represents the maximum draw you can get out of the battery pack via the DC-AC conversion from the inverter. Therefore this solar generator will not power anything above 300 watts. Also, any device application that is rated lower than 300 watts but has a higher surge watt (the initial power to start the device) will not work either. 

A 300-watt solar generator will charge your phone, tablet, and even drone. It will power your lights, mini-fan, and even a mini freezer for some time. However, it will not run a coffee maker, microwave, or even a small blender as these items have a high wattage. For that, you can go for a higher wattage generator like a 1000-watt generator

How long will the solar generator run my devices and applications?

Another important factor is the size of the battery pack itself. The size of the battery pack determines how much energy the solar generator has and consequently how long the solar generator will power your device. 

The solar generator should have a Wh (Watt-hour) rating. A watt-hour is a unit of energy used to measure the amount of work done or energy used over time. It is equal to one watt of power expended for one hour. For example, To run a 60W laptop for one hour you will need 60Wh. 

Most Solar generators however will match the inverter to the watt-hour rating. So a 200-watt solar generator will have a 200 Wh battery and a 300-watt solar generator will have a 300 Wh battery.  This is so that it can provide power for at least an hour.

300 Watt-hours can run various devices and applications. Assuming you are running a combination of different appliances then you run the following with the 300-watt solar generator:

ApplicationWattageNo of HoursWatt-Hours
Light10 Watt5 hours50 Wh
Laptop60 Watts2 hours120 Wh
Phone (Fast Charger)20 Watts2 hours40 Wh
Mini Fan30 Watts3 hours90 Wh

But if you are planning to use one device then you can use your laptop for up to 5 hours and a mini fan for up to 9+ hours. It can also charge your phone more than 20 times and your tablet more than 15 times. You can add a few hours of running time by using a 500-Watt Solar Generator.

What type of Power do you get from the solar generator. 

Solar generators also have different output ports that include AC, DC, and USB. AC ports should provide power similar to a wall outlet and will have from an inverter that converts the DC power from the battery to AC power of 110V, which can be used to power household appliances. The DC output produces DC power at 12V for charging and for specialized appliances that require DC power. The USB output is where you charge your phone, tablet, or drone and has a 5v voltage. 


Other Components of a Solar Generator 



A 300-watt solar generator should be light enough to carry around. With a lithium-ion battery, it should not weigh more than 6 pounds and it should also include a handle so that it is easy to move around with. 


If it’s a small 200 – 300 watt solar generator it shouldn’t cost an arm and a leg. Your budget should be anywhere between $150 to $300. 


The generator should also have a well-lit LCD Display that gives information on the state of charge, voltage, and an indication of how much power is left or how far it is when charging. 

Lithium-ion Battery

A lithium-ion battery is a type of rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging. 

Lithium-ion batteries are common in consumer electronics. They are also used in electric vehicles and large storage applications.They have a higher energy density, which means they can store more energy than lead-acid batteries. This makes them a better choice for applications where weight and space are limited. 

Battery Management System

A battery management system (BMS) is an electronic system that manages a battery pack’s state of charge, state of health, and thermal state while protecting the battery pack from over-charging and over-discharging. The BMS also monitors the pack’s temperature and voltage. The BMS is a critical part of any e-bike because it ensures the battery pack operates safely and reliably

Charge Controller

A charge controller is a device used to manage the charging of a battery bank from a solar array or other DC power source. The controller will limit the rate of charge to prevent damage to the batteries and also help to optimize the charging process to achieve the longest possible battery life.

One of the main advantages of MPPT controllers is that they are more efficient than PWM controllers. They can extract more power from the solar panels, which means that they can charge the batteries more quickly. MPPT controllers can also handle a wider range of input voltages, which makes them suitable for

Options when Charging a 300 Watt Solar Generator

Solar generators can be charged in three ways depending on where you are and the circumstances; an AC outlet, a 12V/24V carport, or a Solar panel.  To charge from a wall AC outlet should take around 5-6 hours and 6-7 hours from a carport or a 60W solar panel. 

Charging a 300 Watt Solar Generator from a Solar Panel

As stated before to charge a 300-watt solar generator will need a 50-60 watt solar panel. This can be a lifesaver as you may not access power from the grid due to a blackout or you are out camping in the woods. This Solar Panel will charge the solar generator in around 6-7 hours depending on the sunlight availability. You may be tempted to increase the size but you can do so up to 100 watts for this solar generator as it cannot be exposed to a higher open voltage from a higher wattage solar panel. 


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