Charge Controllers
Charge Controllers
BrandSteca
Steca Solarix MPPT 3020 and 5020
£ 136.45GBP · price may vary
BrandSteca- Model
- ST-SXMPPT3020
- Specifications
- 7
- System Battery Voltage12V, 24V
- Max VOC100V
- MPPT Trackers1
- ConnectionScrew terminals
- Weight (kg)0.9
- View all 7 specifications ↓
Overview
These controllers use maximum power point tracking and are optimally suited for solar systems with module voltages higher than the battery voltage. In particular, they enable PV modules that are used for grid-connected systems to also be used off-grid. Steca‘s efficient MPP tracking algorithm always provides the maximum usable power of the module, significantly increasing energy yield, especially in poor weather conditions (cloud cover, winter, diffused light). The Steca Solarix MPPT charge controllers combine state-ofthe-art charging technology with high efficiency, professional battery care with numerous programming options, modern design, excellent protection functions and an intuitive LCD display with menu guidance. Electronic protection functions Overcharge protection Deep discharge protection Reverse polarity protection of module, load and battery Automatic electronic fuse Short circuit protection Open circuit protection without battery Reverse current protection at night Overtemperature and overload protection Load disconnection on battery overvoltage
Specifications
| System Battery Voltage | 12V, 24V |
|---|---|
| Max VOC | 100V |
| MPPT Trackers | 1 |
| Connection | Screw terminals |
| Weight (kg) | 0.9 |
| Warranty | 5 |
| IP Rating | IP20 |
What these specifications mean
Steca Solarix MPPT 3020 and 5020 is listed with 7 published specifications from Steca, including system battery voltage of 12V, 24V, max VOC of 100V, MPPT trackers of 1 and connection of Screw terminals. Those figures are what decide whether this unit fits your system, so read them against the equipment it will connect to before comparing price.
For a charge controller, the figures that matter most are conversion efficiency, typically 96–99% for a good MPPT unit, whether it offers a load output, temperature compensation and remote monitoring, type: MPPT or PWM and rated charge current in amps, which must exceed the array's short-circuit current with margin. In any system with a battery and a separate array, the controller is what protects the most expensive component and determines how much of the array's output actually reaches storage.
Choosing a charge controller: the checks that matter
The checks below apply to any charge controller. Run them against the specification table above — most disappointing solar purchases are compatible-on-paper units that fail one of these in practice.
- Prefer a unit with temperature compensation or a battery temperature sensor if the bank lives somewhere that gets hot or cold.
- Choose MPPT over PWM for anything beyond a very small array. An MPPT controller harvests roughly 20–30% more energy because it converts excess panel voltage into charge current instead of throwing it away.
- Size the current rating from array watts divided by battery voltage, then add at least 25% margin for cold, bright conditions where panels exceed their rated output.
- Check the maximum PV input voltage against the array's Voc at your coldest expected temperature, not at 25 °C — Voc rises as temperature falls, and exceeding the limit destroys the controller instantly.
Common mistakes
- Sizing on rated array watts alone and ignoring the voltage ceiling, which is the most common way controllers are killed.
- Using a PWM controller with a high-voltage grid-tie panel — the voltage mismatch wastes a large share of the panel's output.
- Running the load output beyond its rating instead of wiring heavy loads directly to the battery through a fuse.
Price and availability
Steca Solarix MPPT 3020 and 5020 is listed at £ 136 (GBP). Solar pricing moves with supply, import duties and exchange rates, and distributors set their own margins, so treat this as a comparison reference and confirm the current figure before you order.
SolarBazaar compares equipment rather than selling it. Shortlist here on specification and price, then buy from an authorised distributor or installer in your country: warranty cover on solar hardware is normally honoured through the channel you bought from, so confirm who supports Steca locally before ordering.
Steca Solarix MPPT 3020 and 5020 — frequently asked questions
How much does Steca Solarix MPPT 3020 and 5020 cost?
Steca Solarix MPPT 3020 and 5020 is listed at £ 136 (GBP). The figure is indicative — solar prices move with supply, duties and exchange rates, and each distributor sets its own margin — so confirm the current price with a supplier before ordering.
What are the specifications of Steca Solarix MPPT 3020 and 5020?
We hold 7 published specifications for this charge controller, including system battery voltage 12V, 24V, max VOC 100V, MPPT trackers 1, connection Screw terminals and weight (kg) 0.9. The full table is on this page, listed under model ST-SXMPPT3020.
Who makes Steca Solarix MPPT 3020 and 5020?
Steca Solarix MPPT 3020 and 5020 is a Steca product, listed under charge controllers with model reference ST-SXMPPT3020. The Steca brand page lists the rest of its range so you can compare across the catalogue.
Is Steca Solarix MPPT 3020 and 5020 right for my system?
That depends on what it has to connect to. For a charge controller, check maximum PV open-circuit voltage, the hard limit that must survive cold-morning Voc rise, supported battery voltages (12/24/36/48 V) and chemistries and conversion efficiency, typically 96–99% for a good MPPT unit against the rest of your equipment before price enters the decision. Confirm the controller supports your battery chemistry with the right charge profile. Lithium, AGM, gel and flooded batteries need different absorption and float voltages.
Where can I buy Steca Solarix MPPT 3020 and 5020?
SolarBazaar lists and compares equipment rather than selling it. Use the specifications and price here to shortlist, then buy through an authorised distributor or installer — buying in-channel is what keeps the manufacturer's warranty valid.
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