When installing a solar system, you’ll need an inverter—a key component that helps power your home. But which type should you choose: string inverter or microinverter?
Here’s what you need to know to make the right decision for your setup.
What Does an Inverter Do?
Solar panels produce DC (direct current) electricity, but your home runs on AC (alternating current). The inverter’s job is to convert DC into usable AC power for your lights, appliances, and devices.
In simple terms: the inverter acts as a bridge between your solar panels and your home’s electrical system.
Types of Inverters: What’s the Difference?
There are two main types of inverters used in residential solar systems:
1. String Inverters
A string inverter is a single device (usually mounted at ground level) that connects to a group—or “string”—of solar panels. All the electricity from those panels flows through this one inverter.
Pros:
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Easier to service – mounted at ground level for quick access.
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Cost-effective – especially for larger rooftop systems.
Cons:
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Needs rapid shutdown systems for roof installations to meet safety codes.
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May require optimizers if some panels are shaded.
2. Microinverters
A microinverter is a compact device installed directly beneath each individual panel. It converts DC to AC right at the panel, rather than at a central location.
Pros:
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Ideal for smaller ground-mounted systems.
- Doesn't require rapid shutdown system – which results in further savings in your system
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No single point of failure – each panel (or set of panels) operates independently.
Cons:
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More expensive for larger systems.
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Harder to access for maintenance, since they’re mounted on the roof.
Which One Should You Choose?
Here’s a quick comparison to help guide your decision:
| System Need | Best Choice |
|---|---|
| Lower cost for large rooftop systems | String Inverter |
| Easier access for maintenance | String Inverter |
| Simple, cost-effective ground mount setup | Microinverter |
| Complex roof layout or small ground system | Microinverter |
Final Thoughts
The right inverter depends on your solar system’s size, layout, and maintenance preferences.
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For larger systems or if easy servicing is a priority, a string inverter is a great choice.
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For smaller or more modular setups, especially with tricky layouts, microinverters might be a better fit.
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