The company said the tariff, offered in partnership with Opus Energy, was guaranteed to be cheaper than any other deal found through price comparison or third-party alternatives.
Budweiser has pledged to use 100% renewable electricity for its UK operations by the end of 2020.
Publicans could save up to 30% in comparison to existing standard renewal prices from other suppliers.
Some 100 pubs are taking part in a pilot scheme of the programme, with more pubs joining Opus in the spring next year.
Budweiser said it wants to help more publicans reduce their carbon emissions and tackle the climate crisis, which in turn would help them reduce costs.
Paula Lindenberg, president at Budweiser, said publicans were feeling more concerned with their impact on the environment than ever.
Research by the company found that energy bills were a high priority for pub operators looking to cut down on their outgoing costs.
“For us, sustainability isn’t just about looking at our own operations - it’s also about looking outward and supporting our customers," Lindenberg explained.
“We know that our customers are eager to save on energy costs, and that consumers are more environmentally conscious than ever, so this really is a sweet spot where we can make a difference.”
Budweiser beers will start to feature a new symbol encouraging customers to pick beers brewed with renewable energy following its deal with solar energy firm Lightsource BP.
Marc Montgomery, director of SME Direct, Opus Energy added: "We’re thrilled to team up with Budweiser Brewing Group to supply renewable electricity to more pubs and bars across the UK.
“Enabling a zero carbon, lower cost energy future for businesses is our purpose, and this partnership will help more pubs to reduce their carbon footprint and contribute towards the UK’s net zero carbon targets.”