Solar power

Solar panels convert the sun's free energy into DC electricity, which in turn charges your battery via a solar charge controller. 
To enjoy an unlimited supply of free energy and hence an unlimited supply of power, 24 hours a day, all you need to do is to:



Catch the sun

Set up your solar panel in the sun (ideally at a 30 degree angle) and connect it to your ArkPak, via the external terminals, making sure you go through a solar charge controller to protect your battery from overcharging.


Store the energy

You can store up to 130 amp hours of power in your ArkPak with the largest size battery in it. That's the equivalent of around 1,560 watt hours - more than any other device of it's kind in the USA - in a convenient, compact & portable case. 


Power your life

Once your ArkPak is fully charged, you’ll have hours of 12V and 110V power at your fingertips, wherever you go. By our reckoning up to 7 days of continuous 12V power or up to 3 days of continuous 110V power.  (based on average use of a 130ah battery with a 40 litre fridge/freezer or a 19" LCD TV)

Solar Calculations

How much power you manage to collect and store in your ArkPak depends upon the following 5 key things:

•    What size solar panel you have
•    What type of solar panel you have
•    How the panels are positioned relative to the sun
•    The amount of sunshine available each day
•    The ambient temperature at the time

Whilst you can’t control the weather or the temperature at the time, you can control what solar power system you choose and how you position your panels.  

Before doing this, there are 4 things to consider when choosing a solar power system:

1.    Likely power consumption:

The power consumption of your applicance(s) is measured in watts drawn per hour.  Multiply the number of watts your appliance draws per hour x by the number of hours you plan to use it each day.

Watts X Time = Daily power consumption   

i.e laptop (65W) - 65W x 5 hours = 325 watts per day

2.    Battery capacity:

Battery capacity is the amount of energy your battery can store. This is measured in amp hours (Ah). To convert amp hours into watts, multiply the amp hours by the battery voltage

i.e. For a 130ah battery: 
130ah x 12V = 1560 watts  battery capacity.

3.    Solar power generation:

The power generation of solar panels is measured in watts per hour. Multiply the watts size of the solar panel by the time exposed to the sun. Then multiply this by the natural factor of 0.8 as this factors in the natural loss of energy through panel inefficiency and weather.

Watts x Sun time x Natural factor = Power generation

i.e. For a 60 watt solar panel:  60W x 8 hours x 0.8 = 384 watts per day

4.    Solar charge controller:

Solar charge controllers regulate the current from the solar panels and prevent the battery from over-charging. Solar charge controllers need to be matched correctly to, or above, the output current of the solar panels.


Using the above examples:

Without solar panels: With solar panels

Using a 130ah battery, simply divide the battery capacity by the power consumption: 1560W / 325W = 4.8 days. Therefore a battery capacity of 1560 watts can run a laptop at 325 watts per day for 4.8 days.

Using a 60 watt solar panel will generate 384 watts per day, which means you can power your laptop of 325 watts per day permanently.  This is possible as the power generated from the solar panels exceeds that of the power consumed by the appliance.

Choosing A Solar Panel


How to choose the solar panel that's right for you


1. Estimate your power consumption

 Appliance Watts/Hour
Likely daily usage/charging Total daily power comsumption
40 Litre Fridge
18W 24 hours
LED Lamp 5W 3 hours 15W
Mobile Phone 5W 1 hour 5W
Tablet 10W 2 hours 20W
Laptop 36W 2 hours 72W
Television 18W 2 hours 36W
Cordless Drill 55W 1 hour 110W
Digital Camera Charger 6W 2 hours 12W


2. Solar panel power generation

Per Day
Per Day
How long to recharge
a 120A Battery
Running a 40L fridge
with a 120A battery
30W 192W 13A 59 Hours 7 days
63W 403W 27A 28 hours continuous
120W 768W 54A 14 Hours continuous
* Figures are a guide only. Solar panels, battery and fridge are based on average figures which can be affected by solar panel placement & weather condition


3. Solar Panel Choice

Calculate your total estimated daily power consumption and choose the solar panel (from the above table) that will generate sufficient power (watts) to run all the appliances you want to operate on a daily basis.