Article

Simple PV Power Regulator

Build Your First, Fully Functional PV Energy Management System

If you have long wanted to start trying your hand at a complete power management system, but have not done so because of the over-complicated nature of existing designs, here is one to begin with. It’s simple, but complete with everything you need to have. This includes a battery charge controller and voltage regulator on the load side.

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Materials

Simple PV Power Regulator.zip

Component list

Component List

Resistors

R1 = 22 kΩ

R2 = 10 kΩ multiturn trimmer

R3 = 12 kΩ

R4 = 330 kΩ

R5, R12, R13, R16 = 100 kΩ

R6, R7, R18 = 4,7 kΩ

R8, R9 = 8,2 kΩ

R10 = 1 kΩ

R11, R14 = 1 MΩ

R15 = 220 kΩ

R17 = 10 kΩ

R19, R20 = See text.

Capacitors

C1 = 100 nF, ceramic

C2 = 1 µF, 63 V, electrolytic

C3 = 22 µF, 25 V, electrolytic

C4 = 47 µF, 25 V, electrolytic

Semiconductors

D1 = 1N4007

D2, D3 = 1N4148

D4 = 1N5408

LD1 = LED, yellow, 5 mm

LD2 = LED, green, 5 mm

LD3 = LED, red, 5 mm

U1 = 7805

U2 = LM358

T1 = BC557

Q1 = IRF540

Miscellaneous

4+4 Pin DIL IC Socket

ML26 Heath Sink

1x 3MA x 10 mm Screw

1x 3MA Nut

4x Screw Terminal Block, 2 poles, 5 mm pitch

1x Screw Terminal Block, 3 poles, 5 mm pitch

PCB Board (69x72 mm)

Discussion (0 comments)

Rol 1 year ago

Hello, in this article you write that the load is connected/ disconnected depending on the battery voltage.
It explicitly says: “.... Figure 1, not only regulates the battery charge, holding it when it reaches its limit voltage, but also manages the load, connecting the battery when its voltage is high enough to keep the downstream load running, and disconnecting when the voltage becomes too low”. I can't find any component in the circuit that can do this!??However, this function would be very important in order not to destroy the battery due to deep discharge. The current consumption of the regulator alone could lead to this in winter without sunlight.
I find the explanation of the current regulation, in which Q1 absorbs the current, very confusing. It makes you think of a shunt regulator as described in the solar regulator article in elektor 3/2000.

0 Comment(s)

DE183712 8 months ago

Hallo, mir fehlt auch die Funktion für die Trennung der Batterie gegen Tiefentladung wie es ROL beschrieben hat. Weiters fehlt im Artikel auch die angeführte Beschreibung der Widerstände R19 und R20.

gibt es da irgendwo eine Richtigstellung zw. eine Ergänzung?
Lg Huber Elmar

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