Solar Powered Repeater System
Calculate Your Total Daily Amp Hour usage
AC Loads
List AC load items
Quantity
X
Watts
X Hrs/week = Wh/week
Total Wh/week
-
①
DC watt hours per week. Multiply line
①
by 1.15 to correct for inverter loss.
-
②
Inverter DC input voltage; This is DC system voltage.
12
-
③
Divide line
②
by line
③
. This is total amp hours per week used by AC loads.
-
④
DC Loads
List DC load items
Quantity
X
Watts
X Hrs/week = Wh/week
In order to design a solar power system you will have to first determine your estimated electrical needs.
Determine How Much Electricity You Will Use
•
Calculate Your Total Daily Amp Hour usage
•
Calculate how many Solar Panels you will need
•
Calculate what size of Batteries you will need
Solar power system
64
Total Wh/week
-
⑤
DC system voltage.
12
-
⑥
Total amp hours per week used by DC loads. Divide line
⑤
by line
⑥
.
-
⑦
Total amp hours per week used by AC loads from line
④
-
⑧
Add lines
⑦
and
⑧
. This is total amp hours per week used by all loads.
-
⑨
Divide line
⑨
by 7 days. This is total average amp hours per day.
Daily Amp Hour Usage =
-
⑩
Calculate how many Solar Panels you will need
Total average amp hours per day
-
①
Divide line
①
by 0.8 to compensate for loss from battery charge/discharge
-
②
Average sun hours per day in your area
-
③
Divide line
②
by line
③
. for total amps required
-
④
Multiply line
④
by 1.15 to correct for generating loss.
-
⑤
Continuous non-sunshine days in your area
-
⑥
Multiply line
⑤
and line
⑥
for total solar array amps required.
-
⑦
Peak amps of solar module used
-
⑧
Total number of solar modules in parallel. Divide line
⑦
by
⑧
.
-
⑨
Round off to the next highest whole number.
Number of Solar Panels=
-
⑩
Calculate what size of Batteries you will need
Total average amp hours per day
-
①
Divide line
①
by 0.8 to compensate for loss from battery charge/discharge
-
②
Continuous non-sunshine days in your area
-
③
Multiply line
②
and line
③
for total Wh required.
-
④
DC system voltage.
12
-
⑤
Divide line
④
by line
⑤
for required Ah.
-
⑥
Safety factor
2
-
⑦
Multiply line
⑥
and line
⑦
for total battery capacity Ah required.
Battery Capacity=
-
⑧
