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Solar Controllers – MPPT & PWM Regulators for Camping and Overlanding
Solar controllers regulate the power from your solar panels to your battery system. They prevent overcharging, optimise energy harvest, and ensure safe, efficient charging. Choose MPPT controllers for maximum efficiency with high-wattage setups, or PWM controllers for budget-friendly, smaller systems.
In this section: Browse all categories • Solar Controllers – Quick Comparison • Capacity & Fit Guide • How to Choose • Care & Durability • Related Sections • FAQ
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Quick Comparison – MPPT vs PWM
| Type | Efficiency | System Size | Cost | Best For |
|---|---|---|---|---|
| PWM Controller | 70–80% | Small (10–20A) | Low | Entry-level camping setups |
| MPPT Controller | 95–99% | Medium–large (20–60A+) | Higher | Overlanding & high-wattage solar systems |
Buyer’s Checklist – How to Choose
- Panel voltage: ensure controller supports Voc of your panels
- Amperage: controller must handle combined current output
- Battery type: confirm LiFePO₄, AGM or GEL charging profiles
- Efficiency: MPPT yields more power in cold/cloudy conditions
- Display: built-in screens or Bluetooth app monitoring
Capacity & Fit Guide
Match controller to your solar array:
- 10–20A PWM: 50–200W panels, weekend trips
- 20–40A MPPT: 200–600W panels, overlanding
- 50–60A MPPT: 600–1000W+ panels, large setups
Care & Durability
- Mount controller in ventilated area, away from heat and moisture
- Check terminals and wiring regularly
- Update firmware if available for smart controllers
- Fuse between panels, controller, and battery for safety
- Monitor battery temps and charge status on long trips
Related Sections
FAQ – Solar Controllers
- What does a solar controller do?
- It regulates voltage and current from solar panels to safely charge batteries without overcharging or damaging them.
- What’s the difference between MPPT and PWM controllers?
- PWM controllers are cheaper but less efficient. MPPT controllers convert excess voltage into current, delivering up to 30% more power.
- Which controller size do I need?
- Base it on your solar array’s max voltage and current. Always allow 20–30% overhead for safety.
- Can solar controllers charge LiFePO₄ batteries?
- Yes, but ensure the controller supports lithium profiles with correct voltage settings.
- Do I need a fuse with a solar controller?
- Yes. Always use fuses or breakers between panels, controller, and battery for safety.
- Can I run loads directly from a solar controller?
- Some controllers offer load outputs, but for high-power devices it’s better to connect loads directly to the battery.
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