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
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Description
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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.
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Circuit Schematic
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Breadboard Built
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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
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Dump Control
+Solar Panel
External Load
Pin 2 of
IC2a
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Dump Circuit
Connect: Electric Heater Water Heater Lighting Circuit Water Pump Anything With A Fairly Large Resistance
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Batteries
Connect any size 12Volt battery to charge:
18Ah 55Ah
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Batteries Cont.
→ Batteries can also be connected in parallel for more amperage and longer life when powering various appliances.
→ Will take longer to charge.
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How Does This Circuit Help?
‼ The rising cost of living.
Become independent from the power companies.
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