The enforcement actions are the latest effort by a state to rein in competitive suppliers after a torrent of customers complained about wild energy-price spikes last winter.
Palmco and Hiko, which are based in New York, are also licensed to operate in Pennsylvania.
Systrum, which is based in Fairview, N.J., abruptly discontinued service this year and reverted customers back to their utilities. It also deactivated its website, leaving consumers without access to information.
Officials from the three companies did not respond to phone messages.
The complaints seek restitution for consumers, as well as civil penalties, attorneys' fees, and costs.
New Jersey officials signaled last month an impending crackdown on suppliers after the Board of Public Utilities (BPU) approved a memorandum of understanding with the Attorney General's Division of Consumer Affairs spelling out the roles the agencies would take to prosecute suppliers for illegal marketing practices.
The state said it and the Better Business Bureau received about 1,463 consumer complaints about the three companies.
"While today's announced allegations against a few energy suppliers should send a clear message to the energy supply industry," said Dianne Solomon, the BPU president, "consumers should understand that there is still a robust market of alternative energy suppliers to be considered that may offer savings on electric and gas bills."