POWER 101
In this section we are going to break down what "power" is and how it
works. We are not talking about "political power" or "power of
attorney". No, we are talking about electrical power.
What is electricity?
Let's start at WHAT electricity is. Electricity is a form of energy.
To get a little more scientific it is the flow of electrons or energy
from one thing to another. You see this flow of electrons happen every
day; when you turn the lights on (if the electricity is working) there
is power flowing from your local power plant to your light bulb and when
you plug anything into the wall outlet it is receiving power from an
exchange of electrons or energy.
AC/DC not just a great band!
Electricity gets even more interesting from here. There are two
different "types" of electricity: Alternating Current (AC) and Direct
Current (DC). They mean exactly what they sound like. DC is a direct
flow of power in one direction while AC is power that changes or
alternates direction.
A few facts about DC power:

Most vehicles use DC power....to run the lights, the radio and even to start

It is the only "type" of power that can be stored in something like a battery.
A few facts about AC power:

Most "Wall Plugs" are AC power systems. That kind of power comes from a power plant.
The most common power plants are Hydro (water), Coal, or Nuclear. 
AC power is much better at traveling over long distances.
Watts going on?
It's time to get down to the nittygritty; Watts, Volts and Amps. You
really don't need to be worried, let's take it one step at a time.
Amps
Electricity consists of the flow of electrons through a conductor
such as an electric wire. You can't see electrons but a helpful analogy
is to think of electricity as the flow of water through a pipe. We
measure the rate of flow of electricity as an electric current (notice
the water analogy again if we think of a river current). Electric
current is measured in Amperes, shortened to Amps or simply the letter
A. A current of 2 Amps can be written as 2A. The bigger the current the
more electricity is flowing.
Volts
So what makes the current flow in the first place? A device such as a
battery provides a potential difference in an electric circuit. If we
go back to our water analogy, the battery is like a water pump that
propels water through a pipe. It creates pressure in the pipe causing
the water to flow. So how do we measure this pressure? We call
electrical pressure Voltage and measure it in Volts, shortened to V. A
voltage of 3 volts can be written as 3V. The bigger the voltage the
higher the pressure and the more current flows. But in order for the
current to flow, the electrical conductor or wire must loop back to the
battery. If we break the circuit, with a switch for example, then no
current flows.
Watts
So how do Current and Voltage relate to one another? Well, the bigger
the current the brighter the light and similarly the bigger the voltage
the brighter the light. Both the voltage and the current in the bulb
determine how much energy is released in a certain time. The Watt is a
measure of power or how much energy is released per second. It can be
shortened to W. One Watt can be written 1W. We can calculate the power
released in a bulb by multiplying the voltage in Volts across the bulb
by the current in Amps flowing through the bulb (W = V x A). For example
a current of 2 Amps flowing through a bulb with 12 Volts across it
generates 24 watts of power. In the UK, domestic power is supplied at
240 Volts. A 100 Watt bulb will therefore draw a current of 100/240 Amps
(about 0.4A). This means a 1A fuse can be safely added to the mains
plug of a desk lamp with a 100W bulb because 1A is much greater than
0.4A. In the USA, the domestic supply is typically 110V, safer than the
UK, and this means a 100W bulb draws a current of 100/110 Amps (about
0.9A).
SOLAR 101
What is solar?
Solar power is energy that is collected from the sun. The amount of
sunlight that reaches the earth is enough energy to power the needs of
the entire world more than 8500 times over. How does it work? Solar
power cells consist of two layers of treated silicon. The bottom layer
is positively charged and the top layer is negatively charged. When the
sun hits the panel electrons move and create electricity. What does
solar efficiency mean? Manufacturers test their solar panels and cells
in perfect conditions (74 degree, 1 MPH wind), which is never what
actually happens in reality. However, with the correct orientation to
the sun and good sunlight, you can expect on average around 60% of the
rated wattage that the panel advertised.
What are the different types of solar and why do we use monocrystalline?

MonoCrystalline:

This is the technology GOAL ZERO employs

1122% efficient  most efficient and very reliable

Lifespan 10  30 years highest wattage per square foot

Made from single silicon crystals

Perform best in the most conditions (light & temperature)

Performs well in low light conditions.



PolyCrystalline:

815% efficient

Made from multicrystal silicon

Looks like fish scales or shattered glass

Simpler manufacturing process


Amorphous:

56% efficient

Old technology

Weak: break easily

Nice looking

Rigid

Work well in shady conditions

Typical use: solar calculator


CIGS

510% efficient

Flexible

More expensive

Bigger size

Easy to manufacture

Why use GOAL ZERO solar?

Easytouse: GOAL ZERO has taken the guess work out of using solar.
Panels, power packs, lights, accessories and cords  everything you need
is in one place and is designed to work together. No electrician
required!

CostEffective: GOAL ZERO is choosing pieces and parts that are
highquality and costeffective so that we can pass along the savings to
you. We want to make solar power accessible to everyone.

Dependable: We test and test and then test some more so that you always have the power you need when you need it.
Comparison Guide
Goal Zero Power Packs 
Guide 10 
Escape 150 
Extreme 350 
Watt Hours 
10 
150 
350 
Weight (oz/lbs) 
6.4 oz 
12 lbs 
26 lbs 
Size (inches) 
2.5 x 4 x 0.72 
9 x 9 x 18 
9 x 10 x 6 
Price  List

$59.95 
$199.99 
$349.99 
Charge Time with Nomad 7 
24 hours 
n/a 
n/a 
Charge Time with Nomad 13.5 
n/a 
12 hours 
27 hours 
Charge Time with Nomad 27 
n/a 
6 hours 
13 hours 
Charge Time with Boulder 15 
n/a 
10 hours 
23 hours 
Charge Time with Boulder 30 
n/a 
5 hours 
12 hours 
Charge Time with Escape 30 
n/a 
5 hours 
12 hours 
Charge Time from Wall 
n/a 
5 hours 
67 hours 
Charge Time from USB 
68 hours 
n/a 
n/a 
Charge Time from Car/Boat 
n/a 
5 hours 
12 hours 
Recharge Times: Cellphone 
3 times 
75 times 
175 times 
Recharge Times: Laptop/iPad 
0 

7 times 
Run Time: Mini Fridge 
0 

3 hours 
USB Output 


Inverter Additional 
12V Output 
n/a 

Inverter Additional 
AC Output 
n/a 

Inverter Additional 
Chainable? 
No 
No 
Yes 
Available in Kit? 
Yes 
Yes 
Yes 
Battery Technology 
NickelMetal Hydride 
AGM LeadAcid 
AGM LeadAcid 
Cycles 
2000 
800 
800 
Product Family 
Elite 