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Advice on buying solar panels for the
home, caravban or boat
How to select your electrical solar panel system
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within 24 hours ? Usually no problem, and no
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Solar energy is a tried and tested power
source that is already being used around the world for numerous
commercial, industrial, government and domestic applications.
It is powering water pumps in African villages, weather
stations in the Antarctic and satellites in space! Here
we calculated panel requirements for you, based on your
quick assessment of power needs. This calculation provides
a useful guildline to working out which panels you will
need. The simple calculation is explained below. Batteries
are not supplied with these kits, as they are generally
not sold by mail order, however they are easily available
from car accessory shops or (usually cheaper) caravan supplies
(see Yellow Pages). Of course, if you are using solar energy
to power your caravan or boat, for example, you have your
battery already. |
Step1:
Calculate Energy Required to Run Appliances:
Enter the power rating and the number of hours used per
day for up to five appliances, then click on "calculate":
Step2: Calculate Energy Required from Solar Panels:
The panels will therefore need to supply this amount of
energy to the battery each day, to cover this total power
required by your appliances.
However, to account for natural losses, we multiply the
result by 1.2 (this factor allows for natural system losses,
assuming 85% efficiency). Therefore, we will assume the
panels will actually need to be able to supply a total of
WattHours
Step3: Calculate Power Rating of Solar Panels:
SUMMER (Seven hours of Sunshine per day)
In order to supply
WattHours of energy per day, the panels (which we assume
receive 7 hours sunshine in the UK), will need to be rated
in total at
divided by 7 =
Watts
AVERAGE (Four hours Sunshine per day)
In order to supply
WattHours of energy per day, the panels (which we assume
receive 4 hours sunshine in the UK), will need to be rated
in total at
divided by 4 =
Watts
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