mppt charge controller - ZLPOWER ??

[tonigau]

Hi John,
From reading user manual & other information These charge controllers definitely appear to be genuine MPPT. I ordered some & am waiting for delivery. Confirm the temperature sensor is included as it is stated as an option in the manual, it would operate without the sensor. (just to be sure)
There is an isolated RS232 port on the side of these for data logging. But I am having some trouble getting any detail on the com port & data structure.


>>"Simple it is false advertising. You cannot have a PWM MPPT CC"

I suspect the manufacturer is meaning that they use PWM to control the battery charging after the MPPT stage of their converter. The 3 large electrolytic caps I would assume to be the output bus from the MPPT, then PWM to charge the battery.

I intend to do some testing when I get my SL-40A's so I will let know the results & confirm other detail.

Toni

[Mike90250]

Open up a good PWM charge controller, like a trace c-40, has some chips, and coils too.

MPPT needs a micro-processor, and NVRAM and I don't see a CPU in the photo shown. Buyer beware. Look on amazon for product reviews, and assume half are company shills.

[Sunking]

Conntaxman the issue is the conflict in terms.

PWM = Pulse Width Modulated. A PWM controller in laymen terms is nothing more than a switch and has 2 states closed (on) or open (off). The switch operates anywhere from 10 to 60 Khz and the duty cycle (on-off pulse width) modulates between 0 to 100%. At 100% duty cycle the switch is closed 100% and the solar panel is connected directly to the battery lowering the voltage of the panel to the battery voltage and operates below Voltage at maximum power. The key point to a PWM controller is the input current = output current and the input voltage must be equal greater than the output voltage.

A MPPT controller is a completely different animal as it is a true DC to DC switch mode or buck/boost voltage converter. Input current does not equal output current, and input voltage can be either be higher or lower than the output voltage.

[conntaxman]

mppt

Simple it is false advertising. You cannot have a PWM MPPT CC

sunking.
I found this inside picture of this solar controller and it is a or has the features of a mppt. Look at the large coils. So it must be a mppt.
here is the link for the pic. look at image 2.
ZLPOWER SL-40A
.

http://www.diytrade.com/china/4/products/8042963/Mppt_Solar_Charge_Regulator_12v_24v_40amp_Parallel_Capability.html

[Sunking]

Simple it is false advertising. You cannot have a PWM MPPT CC

[conntaxman]

I would like to know if anyone bought one of these controllers"Brand Name ZLPOWER " and the link is

http://zlpower.en.alibaba.com/product/362773473-200267635/productdetail.html

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Could someone try to explain how they say it is a mppt but uses ""Pulse Width Modulation (PWM) topol""
Would it still turn the Higher volts into amp's.?
I know it's made over seas, Please don't give me all the stuff about buy morring star and Bluesky, etc. Im just asking a question and have only so much money to buy things. Now if you have the extra money and will give it to me, then I'll buy American.
TKS for your input.
John