S.C. Code § 58-27-830
No electrical utility shall directly or indirectly, by any device whatsoever or in any way, charge, demand, collect or receive from any person, corporation or municipality a greater or less compensation for any electric current or service rendered or supplied or to be rendered or supplied by such electrical utility than that prescribed in the schedules of such electrical utility applicable thereto then on file in the manner provided in this chapter, nor shall any person, corporation or municipality receive or accept any service, electric current, product or commodity from an electric utility for a compensation greater or less than that prescribed in such schedules.
S.C. Code § 58-27-830
2019 Act No. 62, Section 16, provides as follows:
"SECTION 16. Notwithstanding another provision of this act, or another provision of law, no costs or expenses incurred nor any payments made by the electrical utility in compliance or in accordance with this act must be included in the electrical utility's rates or otherwise be borne by the general body of South Carolina retail customers of the electrical utility without an affirmative finding supported by the preponderance of evidence of record and conclusion in a written order by the Public Service Commission that such expense, cost, or payment was reasonable and prudent and made in the best interest of the electrical utility's general body of customers."