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When you measure up the space you have available on your roof or elsewhere, you may find it difficult to capture the power required to run your RVâs house systems completely off of solar power. For a large motorhome, you might need 500 to 800 watts of power.
Solar electricity costs about $10 to $12 a watt installed, though you may be eligible for state incentives.Check your utility bill to see your monthly usage. A robust solar electric system will cost about $20,000. solar energy system big enough to power a computer and a few other small items might cost you about $700 to $1000. These are also well suited for RVs, boats and camping. Learn more about portable solar energy units.