mixing solar panels

[hayeshouse]

I bought a Zamp solar kit off of the marketplace. It came with a 170w panel, but I'd like to add two more panels. Is it ok if the two extra panels are 175w each? Also, it didn't come with an inverter. Once I add two more panels, what size inverter should I buy?

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[Solarcabin Channel]

I bought a Zamp solar kit off of the marketplace. It came with a 170w panel, but I'd like to add two more panels. Is it ok if the two extra panels are 175w each? Also, it didn't come with an inverter. Once I add two more panels, what size inverter should I buy?

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12 volt panels?

They should be close enough in specs to work together.

Inverter size depends more on what you need to run and a pure sine is better than mod sine.

What type battery and controller?