Solar
Monocrystalline vs Polycrystalline Solar Panels: Which Should You Buy?
Short answer
Monocrystalline panels are made from single-crystal silicon and are generally more efficient, so they produce more power from the same roof area. Polycrystalline panels are older technology and typically cost less per panel but need more space. Most modern installations use monocrystalline panels, so compare watts per square metre, warranty and brand support rather than just the label.
The difference
| Monocrystalline | Polycrystalline | |
|---|---|---|
| Efficiency | Higher | Lower |
| Space needed | Less | More |
| Price per watt | Now often similar, as mono dominates the market | Sometimes lower, but harder to find |
| Appearance | Uniform dark cells | Blue, speckled look |
| Performance in heat or low light | Generally slightly better | Slightly lower |
What matters more than the label
- Watt rating and efficiency for the space you have.
- Brand and warranty: product and performance warranties and local support.
- Certification: check that panels meet recognised standards.
- Temperature coefficient: how much output falls as panels heat up.
- Physical size and weight: for your roof and mounting.
Other technologies you will see
Many panels now use half-cut cells, PERC or n-type cells, and bifacial designs that capture light from the back. These can improve output, but compare the datasheet and price, and make sure the installer's design matches the product.
Our advice
Pick quality panels from a brand with warranty support in Kenya, and size the system to your needs. See what solar costs in Kenya.
Common questions
Which type is best for a small roof?
Monocrystalline, because higher efficiency gives more power per square metre.
Are polycrystalline panels bad?
No, they work, but they are less common now and need more space for the same power.
Does panel colour matter?
Mostly for looks. Performance is shown on the datasheet.