Description
The Victron SmartSolar MPPT 250 | 70 is a high-efficiency, high-voltage solar charge controller designed for medium to large off-grid systems. With 250V PV input capability and 70A charge output, this controller is ideal for RV solar systems, marine power installations, off-grid cabins, tiny homes, and mobile work trailers that require large solar arrays or high-voltage panel strings.
Victron’s Ultra-Fast Maximum Power Point Tracking ensures maximum solar harvest during changing weather, shading, and low-light conditions. Integrated Bluetooth Smart provides real-time monitoring and configuration through the VictronConnect app, while VE.Direct enables connection to a Cerbo GX or full Victron power system.
Your uploaded SmartSolar MPPT user manual includes wiring diagrams, lithium setup guidance, breaker sizing, and high-voltage PV string design recommendations.
Solar Array Capability
The SmartSolar MPPT 250 | 70 supports high-voltage panel strings up to 250V, allowing efficient use of residential solar panels and long wire runs with reduced voltage drop.
Maximum Recommended Solar Array Size
| Battery Voltage | Max Charge Amps | Max Recommended Solar |
|---|---|---|
| 12V system | 70A | ≈ 1,000W |
| 24V system | 70A | ≈ 2,000W |
| 48V system | 70A | ≈ 4,000W |
Oversized arrays are permitted; the controller limits output to 70A safely.
Engineering Solar Table (Vmp / Imp / Series Limits)
| Panel Type | Typical Vmp | Typical Imp | Max Panels in Series (250V limit) | Notes |
|---|---|---|---|---|
| 60-cell residential panel | 30–33V | 8–9A | Up to 7S | Ideal for off-grid cabins |
| 72-cell residential panel | 37–39V | 8–10A | Up to 6S | High-voltage PV arrays |
| 144-half-cut module | 38–41V | 10–13A | Up to 6S | Excellent for 48V systems |
| 24V 350–450W module | 32–38V | 9–11A | Up to 7S | Ideal for tiny homes / marine installs |
| 12V RV 100W panel | 18–19V | 5–6A | Up to 13S | Not ideal—too low current for this class of MPPT |
This controller is optimized for residential-grade solar modules, not traditional RV panels.
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