Ladehastigheten øker.

It is a compound noun:

• lade = to charge / charging
• hastighet = speed

Together, ladehastighet means charging speed.

Then the ending -en makes it definite, so ladehastigheten means the charging speed.

In Norwegian, many masculine nouns take -en in the definite singular.

Here, the base noun is hastighet and the full compound is ladehastighet. When you make the whole compound definite, the definite ending goes on the last part:

• en ladehastighet = a charging speed
• ladehastigheten = the charging speed

This is very common in Norwegian compound nouns.

Because Norwegian usually adds definiteness to the end of the noun instead of using a separate word like English the.

So:

• English: the charging speed
• Norwegian: ladehastigheten

The idea of the is built into -en.

Øker is the present tense of å øke, which means to increase.

So:

• å øke = to increase
• øker = increases / is increasing

In this sentence, Ladehastigheten øker can mean:

• The charging speed increases
• The charging speed is increasing

The exact English translation depends on context.

This is the normal Norwegian word order for a basic statement:

subject + verb

So here:

• Ladehastigheten = subject
• øker = verb

That is the same basic order as in English:

• The charging speed increases

Usually not if you mean the charging speed as a complete subject.

Ladehastigheten øker is natural because it means the charging speed increases.

If you remove -en, you get ladehastighet, which is an indefinite noun, and that usually would need a determiner in a normal sentence:

• En ladehastighet øker = A charging speed increases
  This is grammatical, but it sounds unusual in most contexts.

So in most real situations, Ladehastigheten øker is the natural version.

Yes. Norwegian very often writes compound nouns as one word, where English often uses two words.

Examples:

• charging speed → ladehastighet
• car door → bildør
• phone number → telefonnummer

This is something English speakers often need to get used to.

Hastighet is usually treated as a masculine noun in Bokmål, which is why the definite singular form is -en:

• en hastighet
• hastigheten

Because ladehastighet ends with hastighet, the whole compound follows that pattern:

• en ladehastighet
• ladehastigheten

The letter ø is a vowel that does not exist in standard English, so it can take practice.

Very roughly:

• ø sounds somewhat like the vowel in British English bird or burn, but with rounded lips.

So øker is roughly pronounced something like UR-kər or EU-kər, depending on accent and how exact you want to be. That is only an approximation.

Also:

• øker has two syllables
• the first syllable is stressed: Ø-kər

Yes. Norwegian present tense often covers both meanings.

So Ladehastigheten øker can mean:

• The charging speed increases
• The charging speed is increasing

Context tells you which is more natural in English.

The infinitive is å øke.

Here are the key forms:

• å øke = to increase
• øker = increases / is increasing
• økte = increased
• har økt = has increased

So in Ladehastigheten øker, the verb is in the present tense.

Yes. Å øke can be used both ways depending on context.

• intransitive: Ladehastigheten øker = the charging speed increases
• transitive: De øker ladehastigheten = they increase the charging speed

So in your sentence, øker is used intransitively: the subject itself is increasing.