Complex sentence: A typical "150 watt" solar panel is about a square meter in size: such a panel may be expected to produce 1 kWh every day, on average, after taking into account the weather and the latitude.
Split into simpler sentences: A typical "150 watt" solar panel is about a square meter in size. Such a panel may be expected to produce 1 kWh every day, on average, after taking into account the weather and the latitude.