This is the 6044th most frequent Swedish word.
jämtkraft
"Jämtkraft" is the name of an energy company in Sweden, not a standard Swedish word with a specific definition.
In this sentence, 'jämtkraft' refers to the company responsible for providing energy services in a certain region, used as a proper noun.
Jämtkraft distribuerar el i Jämtlands län.
Jämtkraft distributes electricity in Jämtland County.
Here, 'jämtkraft' is used as a proper noun referring to the energy service company, in the context of evaluating their service quality.
Jag tycker att deras service på Jämtkraft är mycket snabb.
I think that their service at Jämtkraft is very fast.
In this sentence, 'jämt kraft' (as two words) is used to describe the idea of having constant and stable energy, not referring to the company but using the separate meanings of 'jämt' (even/consistent) and 'kraft' (power/energy).