Sapphire Energy
20 Amp MPPT Solar Charge Controller MC2010
20 Amp MPPT Solar Charge Controller MC2010
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Sapphire Energy MC2010 20A MPPT Solar Charge Controller (12V / 24V)
The Sapphire Energy MC2010 is a compact, high-efficiency 20A MPPT solar charge controller designed for 12V and 24V battery systems. It is a strong fit for smaller solar setups including RVs, trailers, sheds, lighting systems, and portable off-grid builds where reliability and simplicity matter.
With support for up to 260W on 12V systems or 520W on 24V systems, plus a 100V maximum PV open-circuit voltage, the MC2010 gives you flexible panel options in a compact footprint. MPPT charging helps recover more usable energy in changing weather, cool temperatures, and partial shade.
The MC2010 delivers efficient MPPT charging, programmable load control, and a rugged finned aluminum chassis in a compact controller that is well suited to smaller off-grid systems.
Why You’ll Love It
- 20A MPPT charging for efficient solar harvest on small 12V and 24V systems
- 100V max PV input for flexible panel configurations
- Programmable load output with always-on, timer, and dusk-to-dawn modes
- Adjustable charging current to better match smaller battery banks
- External temperature sensor included for more accurate charging
- Common-negative design that works well with shunts and battery monitors
- Finned aluminum chassis for dependable passive cooling
- RS485 communication for monitoring and integration
Technical Specifications
| Model | MC2010 |
| System Voltage | 12V / 24V (auto-detect or manual set) |
| Rated Charge Current | 20A |
| Adjustable Charge Current | 0–20A |
| Battery Types | Gel, AGM, Flooded, LiFePO4, User / Programmable Lithium |
| Grounding | Common Negative |
| Max PV Input Power | 260W (12V) / 520W (24V) |
| Max PV Open-Circuit Voltage | 100V DC |
| MPPT Tracking Range | Battery Voltage + 1.0V to 0.9 × Voc |
| MPPT Tracking Efficiency | >99.9% |
| Charge Conversion Efficiency | Up to 98% |
| Load Output | Programmable DC load output |
| Load Modes | Always-on / Street Lamp / User Timer |
| Display | Built-in LCD |
| Communication | RS485 |
| Temperature Compensation | External temperature sensor included |
| Cooling | Passive cooling, finned aluminum chassis |
| Protection Rating | IP32 |
| Operating Temperature | -20°C to +55°C |
| Dimensions | 150.7 × 136.6 × 67.1mm 5.9 × 5.4 × 2.6 in |
| Weight | 0.95kg 2.1lb |
Always confirm cold-weather panel Voc remains below the controller’s 100V maximum PV input limit.
Applications
- Small RV and trailer solar systems
- Utility sheds and lighting systems
- Portable battery boxes and compact solar kits
- Security and remote DC systems
- Solar lighting and timer-based loads
Installation Notes
The MC2010 supports both 12V and 24V systems, with auto-detection or manual selection. Keep your solar array within the 100V Voc limit, using cold-weather voltage calculations and allowing reasonable design margin.
Slight over-paneling can improve energy harvest in cloudy or low-light conditions, but output current will still be limited to 20A. For larger systems that need more charging current, more panel capacity, or Bluetooth monitoring, the MC4010 40A controller is the better step up.
Mount the controller in a dry, ventilated location with airflow around the heatsink. Use proper fusing and appropriately sized wiring to minimize voltage drop.
When using multiple controllers on the same battery bank, each controller should have its own separate solar array and its own battery-side protection. Do not connect multiple controllers to a shared solar panel.
Planning to mount the controller in a cabinet, compartment, or other hard-to-reach location? The optional remote LCD screen lets you keep charging data and programming access visible and accessible from a more convenient spot.
Proper fusing protects your wiring and connected equipment. Install a fuse on the positive conductor as close to the battery or busbar as practical.
The MC2010 is a great fit for smaller systems. For more charging capacity, more panel headroom, and built-in Bluetooth monitoring, step up to the MC4010.
Frequently Asked
Can I use the MC2010 with LiFePO4 batteries?
Yes. The MC2010 supports LiFePO4 charging profiles and also allows programmable settings for custom lithium charging parameters.
Does the MC2010 have Bluetooth?
No. The MC2010 uses RS485 communication only. If you want built-in Bluetooth monitoring, the MC4010 is the better choice.
How much solar can I connect?
The MC2010 supports up to 260W on a 12V system or 520W on a 24V system. Always ensure your panel voltage remains below 100V Voc, especially in cold weather.
What is the remote LCD screen for?
The optional remote LCD screen is useful when the controller is mounted out of reach, but you still want charging data and programming access in a more visible location.
Can I connect more than one panel?
Yes, as long as the total solar array stays within the controller’s power and voltage limits. The important limit to watch is maximum cold-weather Voc, which must remain below 100V.
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