Can this can take an input of 5v 2.1a and output 30v 2.5a, and is the set output stable?

No, not unless I have overlooked what would be a very valuable feature. If we assume 100% efficiency for conversion, 2.1 Amps at 5 Volts would give you only 0.35 Amps at 30 Volts, more realistically it would be much less than that since the conversion will not be 100% efficient . 30V * 2.5A= 75 Watts, 5V * 2.1A = 10.5Watts I hope this helps. Please forgive me if I have misunderstood the question.

Can one use this to “trickle “ charge a motorcycle battery?

The previous answer is incorrect. Yes, it absolutely would. In fact, its current handling capacity (~1A or so) would be more than enough to charge a motorcycle battery (12-24 hours), let alone maintain it. However, since it isn't programmable, you wouldn't get the benefit of occasional absorption cycles to prevent sulfation. Nevertheless, you could winter float a 300Ah 8D with this thing with no issues.

Does the usb in ports support data pass through to the usb out ports?

Not supported, it is a power converter and does not support data communication

Does this display delivered current in real time?

With multiple sets of fading LEDs, I'm observing about 2 current updates per second

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Description

【Calibration】 The ZK-DP2 is an adjustable DC power supply module with digital LED tube display. It can calibrate the output voltage and the output current. And it can also be used as a normal power supply module, charger and LED constant current driver.
【Characteristics】 4-bit digital tube display. Three input power modes. High resolution. Several parameters can be displayed. Comfortable outer shell.
【Protective function】 Supports overvoltage protection, overcurrent protection, overpower protection and overtemperature protection.
【Wide range of application】 It is widely used in ordinary power supply, battery charger, LED driving power, instrument voltage display, test counter, circuit test, power conversion. ❤️❤️❤️ For detailed instructions, see the link: http://attach01.oss-us-west-1.aliyuncs.com/IC/Datasheet/13452.pdf
【Note】 This is a DC power module that can not be connected to AC power. Please no short circuit. "IN" and "OUT" can not be connected. Otherwise, the module can not support a constant current output. Make sure the input power is more than the load power. Please turn off the output power when the module is hot. Turn the CV potentiometer counterclockwise more than 10 turns when the output turns off

The device is a constant voltage, constant voltage DC power supply module with digital LED tube display. It can be used as a normal power supply module, charger and LED constant current driver. Properties and protective function ◆ Set constant voltage ◆ 4-bit tube display ◆ Three input modes ◆ Charging mode ◆ High resolution ◆ Comfortable outer shell ◆ Several parameters can be displayed ◆ Circuit protection ◆ Anti-backflow protection ◆ Overcurrent protection ◆ Overvoltage protection ◆ Overcurrent protection ◆ Overtemperature protection Parameter Input voltage for pads: DC 4.0V-13.0V Input voltage for USB: DC 5.0V Output voltage: DC 0.5V - 30.0V Output current: 2A Output power: 15W (max.) Accuracy of the voltage display: +/- 0.1V Resolution of the voltage display: 0.1V Current display range: 0 ~ 2.2A Current display accuracy: +/- 0.05Av Resolution of the voltage display: 0.001A Power display range: 0 ~ 99.99 Ah Capacity accuracy: 0.00W ~ 15.0W Protection temperature threshold: 100 Conversion efficiency: 95% Working current: 30mA Working temperature range: -20 ℃ ~ 85 ℃ Working humidity range: 0% -95% RH Size: 84 * 35 * 24mm Application ◆ Ordinary power supply ◆ Charger ◆ LED drive power ◆ Instrument voltage display ◆ Test meter ◆ Circuit test ◆ Power conversion Package 1 x USB 2A Power Supply Module (Up / Down)

PEMENOL 15W DC-DC Buck Boost Voltage Converter, 5V to 3.3V 9V 12V 24V 30V CVCC Step Up/Down Module Adjustable USB Power Supply Module with Shell

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