A7RIV interval shooting & battery life?

I can't help you here , but with the LCD and EVF off anyway , wouldn't the camera go effectively straight into a standby mode between frames ?

Other options are with a grip on , you'll have two batteries in it .
Can you set it up with external power ?
Either a mains powered battery adapter , or if the camera supports in camera battery charging , will it still shoot while connected up ?
You'll never run out of power then .

A dummy battery connecting to a power source would be an alternative. I have the Smallrig one and it works well. See here.

Using a Smallrig cage for the A7RM4 the dummy battery allows you to use much larger battery (high capacity) packs which can be mounted on top of the cage. The whole solution is functionally equivalent to the USB-C power feed by a powerbank but much more compact. And you can still use the USB-C for some other device.

Thanks.

Looks like I'll have to invest in a USB power bank as I'm having doubts I could run a full 8 hours from a single battery. Though I might try it at home one day to see if it can be done.

No real worry about the security of the connection as the camera would be tucked away on a second level mezzanine, no way I'm parking on a tripod down floor level with forkifts and people constantly moving about.

So, just the battery was sufficient for the 640 pictures?

Are you allowed to share the time laps? We need more video here!

Thnx! lighting was fine imo.
And it is at least over 500 shots and most likely even over 600 shots per battery.

A Jeep! (I'm something of a Jeep enthusiast - used to own one, hope to own one again, someday).

I can see that, with the black utility section on the back of the Jeep, it would have been nice to have stronger lighting. Some video editing programs will allow a custom LUT (Look Up Table) that you could use to bring up the dark tones -- but I must confess I know next to nothing about video. If you shot in RAW, could you use Lightroom (or Imaging Edge, or whatever the Sony converter is) to boost the 'shadows' before re-compiling the video?

I'm glad it worked out. For my part, I've been using the intervalometer function a little for astrophotography. I've also been using an astrophotography program called N.I.N.A to automate image capture (not sure whether it would work for terrestrial imagery, but it might). I haven't had the courage to leave the camera out all night. Too afraid to leave $3000+ of equipment out in my back yard, unsupervised. But I've noticed that the A7RIV will charge while also under PC control (a laptop is plugged into the camera and runs N.I.N.A., which directs my camera mount, and controls the camera, all at once). And as far as # of shots goes, I've shot for maybe 6 hours of a 7 to 8 hour wedding on one battery, on multiple occasions. If anything, the A7RIV's most annoying battery-related characteristic is its tendency to drain the battery while the camera is turned off (there are reasons for the behavior, but it is annoying to pull the camera from the bag and find the battery half empty).