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Contact Mr. Solar®

Mr. Solar® • Here Comes the Sun!

Mr. Solar® Customer Service

Contact Mr. Solar® Customer Service by phone at 888.680.2427 or by mail. Get answers to your questions about our products, your purchases, or anything else for which you need help.

Online Solar, LLC dba Mr. Solar®
PO Box 812
Hunt Valley, MD 21030
United States of America
Toll-free: 888.680.2427

Business Hours (ET/PT)

  • Monday-Friday: 8am to 5pm
  • Saturday: Closed
  • Sunday: Closed

Who are we?

Online Solar, LLC and MrSolar.com are a family-owned and operated business based in Baltimore, MD, USA, that provides solar and wind energy products to customers across North America.

  • A+ Rating at Better Business Bureau
  • Solar energy equipment experts
  • Project engineering available
  • Request Quote

If you need assistance selecting the right product or have questions, you are welcome to contact us using the form below.  Our friendly staff can offer you expert advice and assist you with whatever questions you might have.  If you prefer, we can also assist you by phone toll-free at 888.680.2427 during regular business hours in both the Eastern and Pacific Time Zones.


Need help? We're available at 888.680.2427. Or email us at Mr. Solar® Customer Service Offline