There are some concerns about even the best SSDs losing data if kept without power, and people may question their feasibility for long-term storage. There’s some truth to this, as SSDs use flash storage to store data, and are more susceptible to power-related issues than HDDs.
Normally, the SSD you use on your PC would stay powered down for, say, a few hours, days, or weeks, at the most. Even if your PC is turned off for months, your SSD will still work as intended when you turn your system on the next time. The real problem begins if your SSD is devoid of power for longer periods, say, well over a year or so.
Definitely worth powering up your SSDs art least every 6 months or so, to be safer.
See https://www.xda-developers.com/will-ssd-lose-data-without-power