solar charge controller with dump load circuit built by matt smyrski
Post on 19-Dec-2015
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Solar Charge ControllerWith Dump Load Circuit
Built By Matt Smyrski
Description
Specifications
Solar Charging Current: 0 to 20 Amps continuous. Nominal Battery Voltage: 12V. Recommended Battery Capacity: 0.5 to 400 Amp Hours. Photovoltaic Panel Voltage Ratings: 12V - 23V, (ex: 36-40 cells). Maximum PV input voltage: 25VDC PV Panel Power Rating: 1W to 240W (90ma - 20A). Voltage Drop During Charging: 0.5V @ 10A, 1V @ 20A. Float Voltage Adjustment Range: 13V-15V (range can be altered
using pot). Night Time Battery Current Drain: 0.5-1.9ma. Fuse Rating: 20 Amp standard ATO automotive fuse. Fits into a standard 4" X 4" electrical utility box, can be mounted
on the cover plate.
Circuit Schematic
Breadboard Built
LEDs
The green and red LEDs are used for the float voltage.
Find in battery specs Optima – 13.8 Volts, 1 Amp max
Adjust using the potentiometer When the battery is low the LED will be red At the float voltage the LEDs will alternate
Dump Control
+Solar Panel
External Load
Pin 2 of
IC2a
Dump Circuit
Connect: Electric Heater Water Heater Lighting Circuit Water Pump Anything With A Fairly Large Resistance
Batteries
Connect any size 12Volt battery to charge:
18Ah 55Ah
Batteries Cont.
→ Batteries can also be connected in parallel for more amperage and longer life when powering various appliances.
→ Will take longer to charge.
How Does This Circuit Help?
‼ The rising cost of living.
Become independent from the power companies.
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