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Results tagged with solar-charge-controller
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user 238706
1
vote
My MPPT controller has same voltage in solar input and battery output
A MPPT charger's output is determined by the battery voltage, and charging current is maximised by making the solar panel sit at its MPP.
The MPP's voltage is not equal to the solar panel's open-circu …
- 9,310
1
vote
Matching a 9 V solar panel to a charging controller
A solar panel is a current source over most of its characteristic, and its voltage depends on the input impedance of the charger connected to it. MPPT chargers vary this impedance to keep a solar pane …
- 9,310
4
votes
Accepted
Testing solar charger board with a bench power supply
TL;DR: No, you can't simulate a solar panel's behaviour well with just a bench power supply.
A bench power supply is normally used as an adjustable voltage source with an adjustable maximum current.
Y …
- 9,310
1
vote
Accepted
Rechargeable Li-ion battery pack
A voltage regulator on its own won't do.
In short, you need a proper Li-ion charger with load-sharing, preferably with some form of Maximum Power Point Tracker to get the most out of your solar panel. …
- 9,310
1
vote
Accepted
Constant or variable current when using a solar charger?
As long as it can keep Vin at 4.35 V or more, the CN3038 will adjust the charging current to what the source can deliver, as described on page 7 of the data sheet.
So, you can set the charging current …
- 9,310
5
votes
Accepted
Why doesn't the voltmeter show the charging voltage when connected to a solar controller's b...
A solar panel is a current source over most of its characteristic, and the solar charger sets a charging current for the battery (usually until a pre-set maximum voltage has been reached).
While being …
- 9,310
11
votes
How do/can I charge a Li-po battery without a fancy charger (just using a current)?
You need a proper charger to charge Li-po batteries safely, using the right algorithm; "just using a current" won't do and could damage the batteries.
For your purpose, you need a solar charge control …
- 9,310
3
votes
How can I keep the output voltage of my MPPT buck converter in my PV system constant while c...
An MPPT will maximise charging current by trying to set its input impedance at the value that makes the solar panel sit at its MPP, where the solar panel delivers its maximum power.
That is the only r …
- 9,310
1
vote
How does applying an MPPT algorithm on a buck converter result in maximum current into the b...
The output voltage of the DC/DC converter isn't regulated, and behaves roughly like a current source, with the battery determining the voltage.
When the solar panel sits at its MPP on its I/V curve, a …
- 9,310
1
vote
Accepted
Some questions about the CN3722 solar charging IC and its MPPT setting
Why doesn't a charging cycle begin, when the MPP voltage isn't reached?
Best guess: A solar panel is a current source over most of its characteristic; the output voltage is set by the input impedanc …
- 9,310
4
votes
Accepted
Understanding the working of an MPPT solar charger
A solar panel is not a voltage source (the voltage does not "remain more or less constant"); it is a current source over most of its I/V characteristic. The voltage it shows is "set" by what you conne …
- 9,310