How stable are the DC voltages emitted by the Bluetti EB3A?

I am trying to diagnose a problem which may or may not be caused my Bluetti EB3A, which I have been using for about two years. I bought it to power an astronomy rig, and it needs to power a telescope mount, a camera, and a Raspberry Pi. Lately, the software I use has reported odd errors that seem like they might be voltage-related. I have no way to test the voltage actually being drawn from the Bluetti by these devices, nor do I have any way to see if the voltage being emitted is consistent. If the voltage is variable, then the Bluetti might well be at fault. If not, I’ll have to look at something else. Can someone provide any data about the consistency of the
DC voltage emitted by the various DC output ports of this unit? Thanks.

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@stevecoh1 May I have the error for checking?

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