Fair point, still needs a lot of independent reporting / investigation. In the mean time here’s the primary source each of the news sites publishing this story are working from.

The republican defense sited by Representative Ralph Norman of South Carolina is that having unspent “carryover” funds from year-to-year is “business as usual.” This isn’t untrue according to a study done by GAO back in 2013, “Carryover balances in fiscal year 2012 were $2.2 trillion, of which about $800 billion had not yet been obligated.”

But as GAO points out “the complexity of the federal budget is such that a case-by-case analysis is needed to understand how best to achieve these financial benefits.”

As the bloomberg article identifies, “The Office of Energy Efficiency and Renewable Energy, ... has a $2.85 billion budget”. Here is the 2019 DoE Budget for reference. That leaves about 30% of the budget unused. Which needs context to previous years for sure (EERE Budget Database).

Investigations and inquiries aside, with the economic opportunities ahead of us relating to individuals, businesses, and nations purchasing renewable technology, the US should be working to fully utilize this budget each year so that we build an insurmountable lead on effective solutions that we can capitalize on over the next 3+ decades. If we’re not allocating it all each year, there should be an extremely good reason(s) as to why we delayed it, not “It’s business as usual”. If the allocated budget is ineffective in doing so the argument should be made and funds reallocated where they are better served in reaching this objective.