اللوح الشمسي يوفر الطاقة.

A careful MSA pronunciation is:

al-lawḥu ash-shamsiyyu yuwaffiru aṭ-ṭāqata

A few key points:

• اللوح is pronounced al-lawḥ:
  • the two ل letters come from the article ال plus the first letter of لوح
  • ح is a deeper, breathier sound than English h
• In الشمسي and الطاقة, the ل of ال is not pronounced normally, because ش and ط are sun letters
  • so الشمسي sounds like ash-shamsiyyu
  • and الطاقة sounds like aṭ-ṭāqata
• يوفر here is yuwaffiru, with a doubled middle consonant sound

In normal unvowelled writing, you will usually just see:

اللوح الشمسي يوفر الطاقة

Because الشمسي is an adjective describing اللوح, and in Arabic adjectives must match the noun they describe in definiteness.

So:

• لوح شمسي = a solar panel
• اللوح الشمسي = the solar panel

This is different from English, where only the panel gets the, not solar.

That is the normal order in Arabic:

• noun + adjective

So Arabic says, literally:

• the panel solar

not

• the solar panel

This is one of the most common word-order differences between English and Arabic.

The ending -ي often makes a nisba adjective, which means related to or connected with something.

So:

• شمس = sun
• شمسي = solar, sun-related

In this sentence, الشمسي means solar.

So لوح شمسي is literally a sun-related panel, i.e. a solar panel.

Because the adjective must agree with the noun it describes, not with the source word it comes from.

Here, الشمسي describes اللوح.

• لوح is masculine singular
• so the adjective must also be masculine singular
• therefore: الشمسي

It does not matter that شمس is feminine. The adjective is agreeing with لوح, not with شمس.

Yes. لوح has a broad meaning: board, plank, slab, panel, tablet, depending on context.

In modern technical usage:

• لوح شمسي = solar panel

So this is a normal and idiomatic Arabic term, even if the core word لوح has a wider meaning than English panel.

يوفر here is the verb he/it provides or he/it supplies.

More specifically:

• dictionary form: وفّر
• pattern: a doubled/intensive verb form
• present/imperfect form: يوفّر
• subject agreement: 3rd person masculine singular

Since اللوح الشمسي is a singular masculine noun phrase, the verb is singular masculine too.

Depending on context, يوفّر can mean:

• provides
• supplies
• makes available

Because Arabic verbs already include the subject information.

So يوفّر by itself already means:

• he provides
• it provides

The noun اللوح الشمسي makes it clear what the subject is, so Arabic does not need an extra separate word for it.

Arabic often uses الـ with abstract or general nouns in places where English uses no article.

So الطاقة can naturally mean:

• energy in general
• the energy being discussed
• energy as a concept/resource

This is very common in Arabic. English and Arabic do not always use articles the same way.

A fully vowelled version is:

اللَّوْحُ الشَّمْسِيُّ يُوَفِّرُ الطَّاقَةَ

These endings show the grammar:

• اللَّوْحُ = nominative
• الشَّمْسِيُّ = nominative, matching اللَّوْحُ
• يُوَفِّرُ = indicative verb
• الطَّاقَةَ = accusative, because it is the direct object

In everyday Arabic writing, these short vowels are usually omitted.

Yes, the word order can change.

You can also say:

يوفر اللوح الشمسي الطاقة

Both are correct.

A useful way to think about the difference:

• اللوح الشمسي يوفر الطاقة starts with the noun phrase, so it feels more like As for the solar panel, it provides energy
• يوفر اللوح الشمسي الطاقة starts with the verb, so it feels more like a straightforward The solar panel provides energy

In traditional grammar, the version starting with اللوح الشمسي is usually treated as a nominal sentence with a verbal predicate. The version starting with يوفر is a verbal sentence.