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Every Black Series ships with serious factory power — but how long will it actually run YOUR gear off-grid? Pick your model and trim, check the appliances you'd run, and see your estimated days of autonomy — including whether the rooftop solar keeps up indefinitely.
1. Your trailer
2. What you'd run each day
3. Conditions
What's behind the numbers
Every Black Series carries a factory lithium-class power system: a 400Ah battery bank on the HQ15 through HQ21 Balcony (200Ah on the HQ12, TH19, and TH22) and 600W of rooftop solar standard — doubled to 1,200W on the Yellow Stone and Rocky Mountain trims. The calculator assumes 80% usable battery capacity and 75% real-world solar harvest (controller efficiency, panel temperature, sun angle), the same conservative math we use when helping buyers plan extended off-grid trips.
Planning a bigger system?
If your usage runs past what the factory system covers, our parts store stocks the full Victron Energy ecosystem — batteries, MPPT controllers, inverters, and monitoring — with a component-level sizing calculator at RV Parts Giant.
Related reading: Off-Grid Power for Campers · What Can My Truck Tow? Calculator · Overlanding for Beginners