A close-up picture of the control box designed by Jeff Gilbert of Chesapeake Wind and Solar.
The meters are, from top to bottom, voltage across the battery terminals (12.75V), current in from the panel (0.1A), and current drawn by the pumps (1.4A).
Photo (c) M. Frautschi
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A close-up picture of the control box with the cover off. Clockwise from the upper left: 3 meters, 2 stacked 12.5V batteries (black), controller (black with wires), programmable timer (white), inverter (red), air pump (blue), fish (yellow). DC power from the solar panel enters the box via a sealed Romex cable at the top; AC power and the air tubes exit at the bottom (behind the fish).
Photo (c) M. Frautschi
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