Hello Paul F,
Thank you for writing in.
If you just want to use this meter to monitor the voltage of the battery, you do not need to connect the load wires, just connect the battery to the DC IN.
And if the batteries are connected in parallel, one meter is ok, no need to meter.
Hope this can help you.
Best regards

Hello Gary Brown,
Thank you for writing in.
Could you please tell us your order ID or the link of the product so that we can ensure the product you need and then check the inventory of it?
You can send this information to us by email (service at droking dot com).
Looking forward to hearing from you.
Best regards

Hello Paul Mitchell,
Thank you for writing in.
Could you please tell us your order ID or the link of the product so that we can ensure which product you are referring to?
With your help, we can find a solution more quickly.
Best regards

Hello Lorenz Meier，
Thank you for writing in.
80W+80W is the output power of dual channel.
If you want to have 80W+80W output power, the input voltage should be DC 34V and the independence of the speaker should be 8Ω.
Here are the parameters of the product:
Features:
Amplifier chip: TDA7498
Output power: 100W+100W (Vcc = 36 V, RL = 6Ω, THD: 10%)
Output power: 80W+80W (Vcc = 34 V, RL = 8Ω, THD: 10%)
Wide range single power supply: 15-34VDC(recommended 24V)
Applicable speaker impedance: 8 ohm best(4 ohm or 6 ohm also works)
Four fixed gain settings available: 25.6 dB, 31.6 dB, 35.1 dB and 37.6 dB
Adopts differential input to minimize common-mode noise
Protection: short-circuit protection, over temperature protection
With standby and mute features
High efficiency: 90%

Description:
The TDA7498 is a 100W+100W dual-BTL class-D audio amplifier with single power supply designed for home theater and active speaker applications. It adopts 36-pin PowerSSO packaging with exposed pad up (EPU), more convenient to mount a separate heatsink.

Mode:
The TDA7498 has three kinds of modes: standby, mute and normal working mode(you can set the mode by shorting the pins shown on pictures).
Standby mode: all circuits closed, at a low power state;
Mute mode: all input signals connects ground, the duty cycle of forward/backward PWM output signal is 50%;
Normal working mode: the amplifier works normally.

Hope this can help you.
Best regards

Hello Summi,
We will check it and give you a reply as soon as possible.
Have a nice day!
Best regards

Hello Niclas,
Thank you for writing in.
The SKU of the product should be some digits.
It is hard for us to ensure which product you are referring to.
Could you please tell us your order ID or the link of the product?
With your help, we can find a solution more quickly.
Best regards

Hello Dereck,
Thank you for writing in.
Have you connected this meter to read the voltage of a 220V water heater?
Was it burnt?
What are the 2-110V leads for?
So sorry that we are not sure the details of application.
Could you please tell us more details about it?
With your help, we can find a solution more quickly.
Best regards

Hello Dmitri,
Thank you for writing in.
This problem may be caused by that the under-voltage protection is not adjusted.
Please try to counter-clockwise adjust the under-voltage protection regulation potentiometer until the FAULT light off.
When you adjust the under-voltage protection regulation potentiometer, please do not connect a load.
Here the PDF file is the Datasheet of the product, please check it.
DATASHEET_200133
Hope this can help you.
Best regards