A 45-year-old man who was previously convicted of drug charges has been busted with more than 1,000 grams of fentanyl and $12,000 in cash, according to officials.

Chelsea man Eric Serrano was charged with trafficking fentanyl over 200 grams, trafficking cocaine over 36 grams, and providing a false name to law enforcement.

He’s being held without bail after local and federal law enforcement officers seized more than 1,000 grams of drugs and more than $12,000 in cash from his residence this week.

The street cost per gram of fentanyl runs between $150 and $200, making the street value of this bust as high as $227,600, according to the Suffolk DA’s Office.

“This is a large amount of drugs that could do a large amount of damage in our neighborhoods,” Suffolk DA Kevin Hayden said.

“We’re seeing some positive trends in opioid-related overdose deaths across the state in recent years and part of the reason is operations like this that take deadly drugs like fentanyl off the streets,” the DA added.

Serrano was convicted of drug distribution related offenses back in 1997 and 2010.

The big bust happened Wednesday morning following an investigation led by the Everett Police Department along with members of the Chelsea, Revere, Salem Police departments, DEA Task Force and Massachusetts State Police.

Investigators executed search warrants for Serrano, his vehicle and his Spencer Avenue residence.

Officers there seized 1,138 grams of fentanyl, 63 grams of cocaine, and $12,012 in cash.

Police also located a second male, later identified as Lawrence 23-year-old man Felix Agromonte, inside the residence.

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A CJIS query revealed Agromonte had four outstanding warrants from various agencies for charges related to shoplifting, resisting arrest, assault and battery on a police officer, larceny over $1,200, conspiracy to violate drug laws, possession with intent to distribute a Class A substance, and possession with intent to distribute a Class B substance.

Serrano was ordered held without bail pending a dangerousness hearing next week.