Description
The Victron SmartSolar MPPT 250 | 85 is a high-voltage, high-capacity MPPT controller built for robust off-grid solar power systems. Supporting up to 250V PV open-circuit voltage (Voc) and delivering 85A of charging output, this controller is ideal for off-grid cabins, mobile work trailers, tiny homes, marine systems, and RVs running high-voltage residential solar panels.
With Ultra-Fast Maximum Power Point Tracking, this controller harvests more energy under changing sunlight conditions, partial shading, and low-light environments. Integrated Bluetooth Smart gives you full system control through the VictronConnect App, and VE.Direct ensures compatibility with Cerbo GX and the full Victron ecosystem.
Refer to the SmartSolar MPPT user manual for wiring diagrams, lithium battery charging profiles, breaker sizing, and high-voltage PV design considerations (including cold-temperature Voc calculations).
Solar Array Capability
The SmartSolar 250 | 85 supports high-voltage strings up to 250V, making it perfect for long wire runs and high-efficiency array layouts using 60-cell, 72-cell, and bifacial modules.
Maximum Recommended Solar Array Size
| Battery Voltage | Max Charge Amps | Max Recommended Solar |
|---|---|---|
| 12V system | 85A | ≈ 1,200W |
| 24V system | 85A | ≈ 2,400W |
| 48V system | 85A | ≈ 4,800W |
The controller will safely current-limit to 85A even if the array is oversized.
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 cabins, trailers, and ground-mount |
| 72-cell residential panel | 37–39V | 8–10A | Up to 6S | Excellent match for 48V systems |
| 144-half-cut bifacial | 38–41V | 10–13A | Up to 6S | High efficiency & modern installations |
| 24V 350–450W module | 32–38V | 9–11A | Up to 7S | Great for tiny homes and marine applications |
| 12V RV 100W panel | 18–19V | 5–6A | Up to 13S | Not recommended—current is too low |
This controller is optimized for residential/commercial panels, not low-current 12V RV modules.
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