The SD card is rather particular and copies a specific fstab file, so no, the image will not work with an SSD.

My advice is to follow the self install using the emonScript. Pretty sure the RPi imager copes with SSDs. I think you will still need to create a dummy partition first still though and then expand the partitions as per the instructions for the SD Card.

https://docs.openenergymonitor.org/emonsd/install.html