Been running my garden office off-grid for about 8 months now. Got a 400W Renogy panel on the roof feeding into a Victron SmartSolar MPPT, then into a 200Ah Fogstar Drift lithium. Runs the laptop, monitors, a small fan heater on low, and the router without any issues through summer.
Winter's been the real test though. Dropped to 40–60Wh some grey days last month. Had to ditch the fan heater pretty sharpish and switch to a small oil-filled rad on a timer instead — much more efficient.
Thinking about adding a second 400W panel to shore things up through Jan/Feb. Anyone done similar? Worth it or should I just wire in a small grid backup via the Victron for the dark months?
