Why You’ll Love It
40 A MPPT, 12/24 V Auto or ManualSmart MPPT maximizes harvest; supports 12 V or 24 V systems with auto-detect or manual lock-in when you want it. PV up to ~520 W (12 V) or ~1040 W (24 V); max PV Voc 100 V. |
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Bluetooth & RS-485 Built-InMonitor and configure with the SolarLife BT app (iOS/Android), or integrate via RS-485 for system monitoring. Live PV/battery/load data on the LCD and in the app. |
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Adjustable Output Current (0–40 A)Protect smaller batteries or coordinate with other chargers using the current limiter—set via the app. |
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Finned Aluminum ChassisRugged, finned body sheds heat for reliable high-output charging—great for vans, trailers, and compact installs. |
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External Temperature Sensor — IncludedBattery-temperature compensation improves charge accuracy across seasons. (Lead is short—extend if your battery is farther away.) |
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Programmable Load Output with Usage TrackingRun DC loads (timers, dusk-to-dawn, always-on) and see load consumption right on the LCD and in the app. |
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Common-Negative TopologyPV, battery, and load share the same negative—plays nicely with shunts, battery monitors, and system grounds. |
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Built-In SafetyOver-voltage, over-temp, short-circuit, reverse-polarity, and over-current protections keep your system safe. |
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Parallel-Controller FriendlyRun multiple MC/MT controllers to one bank (separate arrays per controller). Extra PV is safely clipped at 40 A output. |
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Practical DetailsClear LCD, low self-consumption, and a tidy footprint make the MC4010 a compact workhorse for small and mid-size 12/24 V systems. |
Overview
Meet the MC4010 — a compact, connected 40 A MPPT charge controller for 12/24 V systems. It supports up to ≈520 W on 12 V or ≈1040 W on 24 V (with 100 V max PV Voc), making it a perfect fit for vans, trailers, small boats, sheds, and compact off-grid builds.
Bluetooth is built in (via the SolarLife BT app), RS-485 is on board for integrations, and you get a programmable load output with consumption tracking right on the LCD and in the app. An adjustable output current limiter (0–40 A, set via the app) lets you protect smaller batteries or coordinate with other charging sources.
MPPT matters: in cold mornings, partial shade, and shifting light, the MC4010’s tracker recovers energy PWM leaves on the table — giving you more usable watt-hours from the same panel area.
Efficient, Battery-Friendly Charging
High-precision MPPT tracking (>99.9% claim; conversion up to ~98% in ideal conditions) pushes every watt into your battery bank. Choose Lithium (LiFePO₄), AGM, Gel, or Flooded profiles and fine-tune targets to your battery maker’s specs. The included external temperature sensor enables temperature-aware charging across seasons (lead is short — extend if needed).
Expect fuller batteries, faster recovery after cloudy spells, and more runtime from the same array — especially in shoulder seasons.
Smart and Simple to Use
Check volts, amps, charge stage, and load consumption on the clear LCD or via SolarLife BT (iOS/Android). The MC4010 can auto-detect 12/24 V or you can lock the system voltage manually. Use the current limiter (0–40 A, set via the app) to match small batteries or to coordinate with alternators/shore chargers.
The programmable load terminal makes automation easy: pick Always-on, dusk-to-dawn “street-lamp,” or custom timer modes — no extra controller needed.
A proven pairing: ~400–520 W of panels into a 12 V system (or ~800–1040 W on 24 V) delivers strong daily harvest while the controller clips safely at 40 A when there’s surplus sun.
Built for Reliability
The MC4010’s finned aluminum chassis sheds heat efficiently for steady performance in compact installs (provide ventilation). It’s rated IP32 and protected against over-voltage/current, short circuit, reverse polarity, over-temperature, and low-voltage disconnect. Common-negative wiring keeps installs clean and monitor-friendly.
Need more charging power later? You can run multiple controllers in parallel to one battery bank — just give each controller its own PV array and fuse/disconnect.
Who It’s For
Perfect for space-conscious off-grid systems — vans/RVs, sailboats, tiny cabins, job trailers, security cams/routers, and remote sensors — where you want dependable MPPT performance, simple app control, and room to grow.
If you prefer a heavier, more rugged heatsink for hot climates and sustained no-derate operation, consider the MT4010. If you want a compact footprint with the same 40 A brains — the MC4010 is your pick.
Ready to build? Keep wiring tidy and protected with our 4-channel MIDI fuse block. Slight over-paneling (while keeping cold-weather Voc ≤ 100 V) helps in darker months — and the MC4010 clips safely at 40 A when the sun is abundant.
Applications
- RVs, trailers & van conversions — 12/24 V house systems up to ~520 W (12 V) / ~1040 W (24 V) PV; Bluetooth app makes monitoring easy on the road.
- Marine (sail & power) — House banks with efficient MPPT harvest; mount in a dry, ventilated locker.
- Off-grid cabins & tiny homes — Daily loads like lights, DC fridges, pumps; selectable battery profiles (LiFePO₄/AGM/Gel/Flooded).
- Remote telecom & IoT — Gateways, repeaters, sensors; integrate via RS-485 or use Bluetooth for quick checks.
- Security cameras & network gear — Reliable DC power with programmable load modes, LVD, and load consumption tracking.
- Solar lighting & signage — Dusk-to-dawn “street-lamp” mode plus timer/user schedules.
- Field power carts & battery boxes — Portable charging with real-time LCD status and the SolarLife BT app.
- Job trailers & construction — Tool charging, lighting, and comms support at temporary sites.
- Battery maintenance & backup — Keep vehicles/boats topped up during storage.
Performance in Real-World Setups
Finned aluminum chassis sheds heat efficiently — compact yet capable for vans, trailers, and small cabins.
The MC4010’s high-speed MPPT continuously tracks the optimal voltage/current point as light and temperature change, recovering energy that would otherwise be lost in
partial shade, moving rigs, or cool mornings. In arrays sized for the controller (e.g., ~400–520 W on 12 V; ~800–1040 W on 24 V),
it sustains strong bulk-charge currents when the battery state-of-charge and sun allow. Bluetooth + LCD show live PV, battery, and load consumption,
while RS-485 supports deeper monitoring/integration.
Thermal behavior is practical for mobile/off-grid use: the finned aluminum chassis sheds heat efficiently when installed with ventilation. The built-in current limiter (0–40 A, set via the app) lets you cap output for smaller batteries or coordinate with other charging sources. An external temperature sensor is included for more accurate charging across seasons (lead is short — extend if needed).
Install & Sizing Tips
System voltage: 12/24 V (auto-detect or manual set). Charge current: up to 40 A. Max PV power: ~520 W (12 V) / ~1040 W (24 V). PV voltage limit: Voc ≤ 100 V (use cold-weather Voc in your calculation and leave margin). Keep cable runs short, size conductors to minimize voltage drop, and mount the controller in a sheltered, ventilated location with airflow around the heatsink.
Over-paneling: Slightly oversizing the array can improve harvest in cloudy/shoulder seasons; the controller safely clips output at 40 A when available power exceeds demand. Always keep array Voc under 100 V in your coldest conditions.
Parallel controllers: You can run multiple MC/MT controllers to one battery bank — give each controller its own PV array, identical voltage setpoints, and its own battery-side fuse/disconnect. Do not parallel PV inputs; keep arrays separate.
Fusing & distribution: Fuse both battery and PV sides close to the source. A clean battery-side option is our 4-channel MIDI fuse block — ideal for protecting the controller’s positive lead (and other devices) while keeping wiring tidy.
Profiles & app: Use the SolarLife BT app to select Lithium/AGM/Gel/Flooded profiles, fine-tune setpoints, and set the current limiter. Connect the included temp sensor for temperature-aware charging.
MC4010 — Key Features
A compact, connected 40 A MPPT for 12/24 V systems — with Bluetooth + RS-485, adjustable current limiting, finned aluminum cooling, and programmable load with consumption tracking.
40 A High-Efficiency MPPT
Tracks the best power point in real time for stronger harvest in cool mornings, moving rigs, and partial shade.
PV up to ≈520 W (12 V) / ≈1040 W (24 V); max PV Voc 100 V.
12/24 V — Auto Detect or Manual Set
Works with 12 V or 24 V battery systems. Let it auto-detect or lock the system voltage manually.
Bluetooth + RS-485 Included
Use the SolarLife BT app (iOS/Android) for live data and setup, or integrate via RS-485 for longer-run monitoring.
Adjustable Output Current (0–40 A)
Dial back max charge current set via the app to protect smaller batteries or coordinate with other chargers.
Finned Aluminum Cooling
Rugged, finned body sheds heat efficiently — ideal for vans, trailers, and compact enclosures with ventilation.
External Temperature Sensor — Included
Improves charge accuracy across seasons. Lead is short — extend if your battery is farther away.
Programmable Load + Usage Tracking
Run DC loads (always-on, timer, dusk-to-dawn) and see consumption on the LCD and in the app.
Battery Profiles & Fine-Tuning
LiFePO₄, AGM, Gel, Flooded presets plus user setpoints for absorb/float — match your battery maker’s specs.
Common-Negative Topology
PV, battery, and load share the same negative — plays nicely with shunts and battery monitors.
Built-In Safety
Over-voltage, over-temp, reverse-polarity, short-circuit, and over-current protections.
Parallel-Controller Friendly
Run multiple controllers to one bank (separate arrays). Extra PV is safely clipped at 40 A output.
MC4010 vs MT4010 — Which one fits?
- Same power & brains: Both are 40 A MPPTs with adjustable current limiting, 12/24 V, Bluetooth + RS-485.
- MT4010 = heavier heatsink: Larger, more rugged chassis for better sustained thermal performance without self-derating.
- MC4010 = compact footprint: Slimmer, space-saving body — ideal where mounting room is tight.
Recommended battery-side fuse & distribution: Keep wiring tidy and protected with our 4-channel MIDI fuse block.
Technical Specifications — MC4010
| System | |
| System Voltage | 12 / 24 V (auto-detect or manual set) |
| Max Charging Current | 40 A (adjustable 0–40 A, set via the app) |
| Battery Types | Gel, AGM, Liquid, LiFePO₄, Lithium (programmable) |
| Grounding | Common Negative |
| Solar PV Input | |
| Max PV Input Power | ≈ 520 W (12 V) · ≈ 1040 W (24 V) |
| Max PV Voltage (Voc) | 100 V (verify cold-weather Voc stays below limit) |
| MPPT Tracking Range | (Battery V + 1.0 V) → 0.9 × Voc |
| Charging Performance | |
| MPPT Tracking Efficiency | > 99.9 % |
| Charge Conversion Efficiency | Up to ~98 % (optimal conditions) |
| Adjustable Current Limiter | 0–40 A (set via the app) |
| Temperature Compensation | Via external probe (included) |
| Outputs & Interface | |
| Load Output | Programmable DC load (Always-on / Street-lamp / User timer) with consumption tracking (LCD + SolarLife BT app) |
| Display | LCD (live PV / battery / load data) |
| Communication | Bluetooth (SolarLife BT, iOS/Android) · RS-485 |
| Remote Temperature Sensor | Included (lead is short — extension may be required) |
| Physical & Environmental | |
| Chassis & Cooling | Finned aluminum heatsink (passive cooling) |
| Protection Degree | IP32 |
| Self-Consumption | Low standby draw (off-grid friendly) |
Solar FAQ
About Solar Charge Controllers
What does a solar charge controller do?
It prevents overcharging, regulates voltage, and ensures your battery bank charges in a safe, controlled way. Without one, solar panels could damage a battery by pushing in unregulated power.
At Sapphire, controllers are chosen to match our LiFePO₄ batteries perfectly, so you get maximum performance and lifespan from all of your gear.
What is the difference between MPPT and PWM?
This works ok for lower voltage arrays, but wastes a significant amount of energy on higher voltage panels, and potentially risks damage to control circuits on the batteries. PWM is lower cost, but lower efficiency.
MPPT (Maximum Power Point Tracking) controllers do exactly what the name implies. They use advanced electronics and actively adjust their behavior to pull the most power possible from your PV array. This is accomplished by actually transforming the excess voltage, into current that can be funneled directly into your battery system.
This boosts efficiency by up to 30%, and makes higher voltage arrays possible, reducing wiring costs. MPPT is almost always worth it. See our blog posts for deeper dives into MPPT vs PWM.
How do I size a solar charge controller?
View our Solar Panels and Charge Controllers
Can I use a solar charge controller with LiFePO₄ batteries?
Many modern controllers include lithium charging profiles built in.
How much solar can I connect to my controller?
Moderate oversizing is fine—the controller will “clip” excess power—but never exceed its voltage rating. Check the Voc ratings on your panels, and be aware that colder temperatures will increase the panel output voltage. Leave yourself a margin so you're not stressing your controller.
When in doubt, it's always better to have a controller that is rated for more than you're connecting. It will help the controller run cooler, longer.
Do I need an inverter with a solar charge controller?
The solar controller's job is to manage DC charging only. What you do with that newly charged battery power is up to you.
To power AC appliances like microwaves, laptops, or TVs, you’ll need an inverter.
Can I mix different solar panels with one controller?
Best practice is to use matched panels.
What protections are built into solar charge controllers?
Are solar charge controllers waterproof?
Some of our RV controllers are IP54 giving you excellent dust and water protections, and there are IP65 models available for fully outdoor installations.
Generally though, it's best practice to mount the controllers inside a clean, cool, dry space. If you're note sure, contact us and we're happy to help.
What accessories should I use with my controller?
Sapphire offers disconnect switches and accessories designed to work with our batteries and controllers.
How long does a solar charge controller last?
Our MPPT units are designed for long-term reliability to match the service life of our Solar Panels, and our LiFePO₄ batteries.
What are common applications?
Controllers are commonly used in van builds, RVs, cabins, boats, tiny homes, and emergency backup power kits. They’re also great for specialized uses like powering security cameras or farm gates.
See our Blog Articles for ideas and more information
About Solar Panels
What size solar panel do I need?
Start with discovering your daily power needs, cross checked with your battery sizing. See our article about sizing your battery for a good place to get started.
Can I connect multiple solar panels together?
Be sure to consider the limitations of your charge controller when adding more solar.
What happens if I oversize or undersize my solar array?
Under sizing will leave batteries undercharged, and you may struggle to keep the lights on. This may require you to augment your battery charging with things like DC-DC Engine Charging, Shore Power, or a generator.
What is the difference between monocrystalline and polycrystalline panels?
Polycrystalline panels are sometimes slightly cheaper, but are an obsolete technology and it is recommended to avoid new installs using these.
Do solar panels work in cloudy weather or winter?
MPPT controllers can help maximize energy, even in sub-optimal conditions. Many people will "over panel" when they expect low production.
How long do solar panels last?
Are solar panels waterproof and durable?
What maintenance do solar panels need?
When washing, use a non abrasive brush/cloth and a gentle soap.
Use a soft edged brush, or wiper, to remove snow and ice. Avoid hitting/impacts or using heat.
Can I install solar panels myself?
What angle or direction should solar panels face?
Flat mounting on vans and RVs works too, but expect lower winter performance. Tilting mounts can boost output, but require you to stow the panels before moving.
Buying & System Design
How do I calculate how much solar I need?
Ideally, you want to have more solar than you use in a day, so you can "catch up" after a couple of cloudy days.
For help, see our off-grid battery sizing guide.
What size battery bank should I pair with my solar panels?
Figure out your daily usage, then multiply for the number of days you want to run without charging.
After that it's just a matter of picking your batteries out. Our batteries are listed with their Watt hour (Wh) capacities to help make this easier.
See our article on battery sizing to help get a better understanding.
Do I need both a solar charge controller and an inverter?
The inverter converts DC to AC so you can run household devices. Off-grid systems use multiple components together: Solar panels + MPPT controller + Sapphire LiFePO₄ battery + Inverter.
What safety equipment do I need for a solar setup?
Sapphire carries battery disconnect switches and wiring accessories tested to handle high current safely.
Can solar power run my entire house or RV?
Reach out to us with your goals and we can help guide you!
What solar setup is best for vans, cabins, or sheds?
Vans: Usually 100–400W of panels + 100–300Ah LiFePO₄ battery.
Cabins: 400–1000W panels + 200–600Ah battery.
Sheds: 100–200W with 100Ah battery (more if you want to run tools)
DID YOU KNOW?
Lithium is faster charging, safer and more efficient than lead-acid
Upgrade to a Sapphire LiFePO₄ battery today to unlock your full potential