The law changed for equipment installed after 12/31/22. The credit is now increased to 30% of the installed property cost, with a $1200 annual cap and a $600 sub-cap for efficient property such as a heat pump. The lifetime cap has been removed. See here for more.
https://ttlc.intuit.com/community/tax-law-changes/discussion/faq-revisions-to-section-25c-energy-eff...
