The K6NE Photo Voltaic (PV) Power Experiment

2/2012 - Complete Panel System Replacement
Off-Grid, 500 Watts Nominal

7/2002 - 8 solar panels, 6 volts at 5 amps each, make up this array.

Temporary wiring - the flexibility route!

Small auxilliary panel, 300 mA. for paKet station power assist

Analog charge controller, "Sun Switch", QST Magazine
A digital voltmeter is recommended to accurately measure battery voltage.

Panel controller, batteries, AC inverters, and Wire!

Generic Solar Power Wiring Diagram

Notes: "Load" refers to equipment to be operated from 12 volts DC.
This includes inverters that convert DC to a distorted square wave "AC"
to operate small devices, usually less than 100 watts total.
Deep discharge batteries, such as the Trojan T-105
golf cart battery, are recommended.
This allows operation during moderately cloudy weather.

The "missing panel" string supplies about 1 to 3 amps,
thus the array total is approximately 5 + 5 + 3 = 13 amps. max.
in the brightest overhead sunlight condition.


                     Typical Charge Cycle Data - "Sunny Coastal CA Mid-July Day"

                                          Solar  Battery
                                  Time     Amps   Volts     Notes
                                  -----   -----  -------    -----
                                  7 AM     0.5    12.4      cloudy
                                  8 AM     1.5    12.5
                                  9 AM     2.0    12.6
                                 10 AM     8.0    12.9      sunny
                                 11 AM     9.0    13.0
                                 12 PM    10.0    13.1
                                  1 PM    10.5    13.25
                                  2 PM    11.0    13.4
                                  3 PM     9.0    13.6      broken clouds
                                  4 PM     8.0    13.9
                                  5 PM     2.5    14.3      fully charged batteries, finally!
                                  6 PM     0.5    12.84     panels shaded from sun


Panels UP!

Hinges

Lift Arm - Angle Markings

Last Update: 2/20/2012 by K6NE