How to measure Power Consumption of your Home: Page 2 of 2

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2

22

Hallway lighting

12V

8

0.5

4

Bathroom lighting

12V

11

1.5

17

Bedroom 1 lighting

12V

11

1

11

Bedroom 2 lighting

12V

11

1.5

17

Porch and yard lighting

12V

8

0.5

4

Small refrigerator

12V

12

24

288

Television

12V

40

4

160

Laptop computer

12V

40

1

40

Chargers for cell phones, MP3 players, ect.

12V

5

4

20

Phantom loads

12V

1

24

24

Total Energy Requirement a day (watt-hours)

662

Note of caution

It is common to underestimate the power requirements for a home while in the process of planning the solar electric system. A faulty estimate can lead to a faulty system, so attention must be paid to getting the numbers as precise as possible. To avoid future regrets – and potential rebuilding of the system - take care not to forget to add the components that are important to your solar electric system.

Slow and steady with close attention to details is the best approach. You may want to pause now and again to look over your power analysis chart, stopping to confirm the information before moving on to the next step. .

You might want to consider utilizing the opinion of a third party – someone who is well versed in solar electric system implementation. This can be very helpful, especially if you have been deep in the details of planning and developing your system and have lost sight of some of the project’s minutia.  Having a too narrow or short sighted point of view can cause a lot of headaches down the road, but they may be avoided now by bringing in an extra set of eyes to confirm your numbers.


 [V1]Link to appendix C (URL)