Solar Battery Maintainer and charger for 12V, 18V and
This system maintains
fleet vehicle batteries and prevents sulfation when they sit idle. It will replace
self-discharge as well as clock-radio, keyless lock, and other continuous power drains on the
battery. The solar battery keeper can be roof or dashboard-mounted and is available in 2 watts
and 5 watts. Higher wattage systems are available on request.
circuit uses energy harvesting techniques, so it can continue to charge the battery even under
low light conditions. Ordinary solar panels without energy harvesting can only charge the
battery when the solar illumination is intense enough to keep the panel above 13 volts. This
makes the smaller 2 watt panel equivalent to a much bigger panel. It also prevents the battery
from being over-charged.
Thousands of these 2-watt systems are being used in federal
government installations to keep vehicles that are held in reserve ready for service without
having to have someone start and idle them on a regular basis. This results in enough savings
to result in a 6 month payback time.
Pulsed charging algorithm can dissolve
LED flashes to show operation.
Can extract useful power from the
solar panel even at low sun angles.
Electronic Overcharge Protection &
back current blocking to PV panel.
Can be used for lead acid batteries
between 6 and 28 volts, including 6V, 8V, 12V, 16V, 18V, 24V and 28V battery systems.
Suitable for cars, buses, airplanes,
motorcycles, boats, tractors, sail boats, motor homes and ATVs.
100% made in the USA, which makes
export to Canada and Mexico easy.
NO LONGER AVAILABLE,
PST-SC02 Includes a wire
harness and SC-Module.
PST-SC05 Includes a wire
harness and SC-Module.
module without a solar panel)
Lead Acid Battery Nominal
6VDC, 12 VDC, 18VDC,
24VDC, and 28VDC
Continuous charge power
Blocking of solar panel from battery
Battery Reverse Polarity
Battery status LED
Red LED shows
operation, will flash at low rate at low insolation.
8.25 x 5.5 x 0.25 inches 21 x 14 x 0.6 cm
12.75 x 7.25 x 1.125 inches 32 x 18 x 2.9 cm
Included Wire Size
18 inch wire for
under-hood mounting, 17 foot cable to the solar panel
50(W) x 50(D) x 12(H)
mm for control module
Ambient Temperature for charge controller
-10 to 50
-14 to 122 °F
It is not really realistic to expect a 2 watt (or 5 watt) solar panel to do
much charging of a big battery that has been discharged, but it will keep a charged battery
topped-off and keep it from getting sulfated.