Description
Mastervolt SCM20 PWM Solar Charger | Boat Supply Store
For vessels operating in demanding marine environments or for off-grid mobile applications, this solar charge regulator ensures consistent battery replenishment. It’s engineered to handle challenging conditions with water spray protection and high ambient temperature tolerance, operating reliably with 36-cell (12V) or 72-cell (24V) solar arrays. The unit supports all lead-acid battery chemistries, providing a crucial power source for systems requiring robust performance, such as maintaining critical navigation electronics during extended anchoring periods off the Texas coast.
Key Features
- Robust PWM solar charge regulation for stable power management.
- Versatile 12V and 24V system voltage compatibility.
- Wide Panel compatibility with 36-cell (12V) and 72-cell (24V) solar panels.
- Durable water spray protection for marine deployments.
- High Temperature operation ensures performance in hot climates.
- Flexible negative grounding compatibility for diverse electrical setups.
- Universal suitability for all lead-acid battery types.
- Informative large display with switchable output and lighting function.
Specifications
| Product Specifications | |
|---|---|
| Technology | PWM |
| System Voltage | 12V/24V |
| Max Solar Charge Current | 20A |
| Solar Panel Type | 36-cell (12V) / 72-cell (24V) |
| Battery Types | All lead-acid types |
| Water Spray Protection | Yes |
| High Ambient Temperature Suitability | Yes |
| Negative Grounding Compatibility | Yes |
| Display | Large |
| Output | Switchable with evening/night lighting function |
| Optional Accessories | Temperature sensor |
Who This Is For
Boat owners and RV enthusiasts requiring a dependable solar charging solution for 12V or 24V lead-acid battery systems, particularly in challenging marine or mobile conditions. Individuals prioritizing robust build quality and reliable power generation in harsh environments will find this product suitable.
How It Compares
| Feature | Mastervolt SCM20 PWM Solar Charger | Competitor |
|---|---|---|
| Technology | PWM | MPPT, PWM |
| Max Solar Charge Current | 20A | 15A, 10A |
| System Voltage | 12/24V | 12/24V Auto, 12/24V Auto |
| Water Spray Protection | Yes | IP67 (with specific enclosure), No |
| High Ambient Temperature Suitability | Yes | Yes, Yes |
| Negative Grounding Compatibility | Yes | Yes, Yes |
Common Concerns Answered
Does this unit include battery temperature sensing?
The Mastervolt Solar ChargeMaster SCM20 PWM does not have built-in battery temperature sensing, but an optional temperature sensor is available for purchase to provide this functionality.
Why choose PWM over MPPT technology?
While MPPT controllers are generally more efficient, PWM controllers like the SCM20 offer a cost-effective solution and excellent reliability, especially in systems where panel voltage closely matches battery voltage or where extreme robustness is prioritized over peak efficiency gains.
I don't need all the marine-grade features, can I get a cheaper PWM controller?
The SCM20 PWM is specifically designed for demanding environments like marine applications, offering water spray protection and high-temperature tolerance not found in basic controllers. If these features are not critical for your application, lower-cost alternatives may exist, but they will likely lack this level of environmental resilience and specialized functionality.
Frequently Asked Questions
What types of batteries can the Mastervolt Solar ChargeMaster SCM20 PWM charge?
The Mastervolt Solar ChargeMaster SCM20 PWM is suitable for charging all types of lead-acid batteries.
Can this charge controller be used with both 12V and 24V systems?
Yes, the Mastervolt SCM20 PWM is designed to work with both 12V and 24V battery systems.
Is the Mastervolt SCM20 PWM suitable for marine environments?
Yes, the SCM20 PWM is built for challenging marine environments, featuring water spray protection and high-temperature tolerance.
Does the SCM20 PWM have protection against water spray?
Yes, the Mastervolt SCM20 PWM features water spray protection, making it suitable for marine use.
Can I connect 72-cell solar panels to the SCM20 PWM for a 24V system?
Yes, the SCM20 PWM is compatible with 72-cell solar panels when configuring a 24V system.
