When installed with PV, Powerwall is designed to charge from solar energy. If your solar system is not yet operational, Powerwall will not be able to charge. If your solar system is operational and you are in Self-powered Mode, Powerwall will charge with any excess solar that your home doesn't immediately use. Smaller solar systems sometimes do not produce more than your home is currently using. You can increase the backup reserve or switch to Backup-only, which will prioritize charging Powerwall with any solar production.
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