Solar Energy

Solar equipment calculator

Follow the instructions.

Navigate from one field to the next by pressing 'tab' button. Do not press the 'enter' key.

List equipments, appliances and lights you wish to be powered by solar. Enter the power ratings for each one as stated in the equipment or click on the enclosed table for assistance. Indicate the average hours per week the equipment is on.

Load Calculation Work-form:
Equipment or AC load	x Quantity	x Watts	x Hours	=Total(Watt-hrs/week)










Total Power Requirement: Watt-Hours (adjusted by 1.25 for inverter losses)
Inverter input DC (12, 24 or 48 V)
Total amp-hours / day used by AC loads.

Solar Array Size Work-form:
Average sun peak hours. (Select from the chart.)
Peak amps of solar module. (See panel specs)
Number of panels in parallel:
Number of panels in each series string to provide DC battery voltage. (Select from the chart)
Total number of solar panels required:

(Proceed with battery sizing if you need one)
Battery Size Work-form:
Max number of continuous cloudy days in the area
Battery size in amp/hr
Adjust for winter temperature, for lead-acid battery only. (Select from the chart)
Amp-hours of battery chosen. (See battery specs)
Number of batteries in parallel

| 01.01.2009 | Read more - pdf | Print |

Halogen lights	20-50W each
Fluorescent lights	15-30W each
Incandescent lights	60-120W each
Toaster	1,000W
Microwave Oven	800W
Blender	50W
Television	150W
Radio	10W
Stereo	30W
PC Computer	200W
Drill	1,200W

80°F/26.7°C	- 1.00
70°F/21.2°C	- 1.04
60°F/15.6°C	- 1.11
50°F/10.0°C	- 1.19
40°F/04.4°C	- 1.30
30°F/-1.1°C	- 1.40
20°F/-6.7°C	- 1.59

DC Battery Voltage	# of Modules in Each Series String
12	1
24	2
48	4