DC measuring panel
I made this
panel to serve two functions:
1. To connect up solar panels and to regulate their charge to a
battery, as well as monitoring the current and voltage.
2. To measure the current drawn by a load such as a light, fridge,
The parts cost approx. $98 and the panel was relatively easy
to construct. The voltmeter has a range 10V to 16V so as to give a
reasonable accurate reading. The solar regulator is rated at 6A and
it is mounted inside the enclosure. Connections to and from the
panel are via 4mm banana plugs. leads, alligator clips and a
cigarette lighter socket. The alligator clips are useful for
connection to an Anderson plug when charging your camper trailer
There are two
holes in the enclosure’s side for viewing the regulator’s indicator
lights and a further three holes were drilled into the top to
provide ventilation for the internal regulator.
picture above shows the Multifunction panel connected to 2x20W solar
panels charging a 12V 12Ah AGM battery. The solar panels connect to
the input and the battery is connected to the output. The switch is
set to “0”, so as to use the panel’s regulator.
picture above shows the Multifunction panel connected to 2x40W
hinged solar panels which have an onboard regulator. The solar
panels connect to the input and the camper trailer’s Anderson plug
is connected to the output. The switch is set to “1”, bypassing the
Multifunction panel is connected to a 12V Battery and a lamp load is
plugged into the cigarette lighter’s output. The switch is set to
“1”, bypassing the panel’s regulator.
1.1MB pdf download
thanks to Kevin
Davis for sharing this idea