Renewable Energy; Portable Solar Generation Devices
Latest Action: March 19, 2026
Everything you need to know about plug-in balcony solar in Hawaii: legal status, tracked bills, statutory wattage limits, utility interconnection rules, and expected monthly solar production.
Current Disposition: Balcony solar bill failed
Hawaii has no law addressing balcony solar. Its 2026 session considered two portable-solar bills. SB 2902 SD2 HD1 passed the Senate and was referred to House Consumer Protection and Commerce on March 19, 2026; that committee deferred HB 2486 HD1 on February 24, 2026. Neither bill has had any action since March 2026, and the Legislature's calendar set adjournment sine die for May 8, 2026.
Latest Action: March 19, 2026
Latest Action: February 24, 2026
How much electricity will a standard plug-in solar kit produce on a balcony or patio in Hawaii? Below are monthly estimates based on local insolation levels:
| Month | Daily Peak Sun Hours | 400W Kit (1 Panel) | 800W Kit (2 Panels) |
|---|---|---|---|
| Jan | 4.8 hrs | 51 kWh | 102 kWh |
| Feb | 5.3 hrs | 51 kWh | 102 kWh |
| Mar | 5.4 hrs | 58 kWh | 115 kWh |
| Apr | 5.4 hrs | 56 kWh | 111 kWh |
| May | 5.6 hrs | 60 kWh | 119 kWh |
| Jun | 5.6 hrs | 58 kWh | 116 kWh |
| Jul | 5.6 hrs | 60 kWh | 119 kWh |
| Aug | 5.8 hrs | 62 kWh | 124 kWh |
| Sep | 5.9 hrs | 61 kWh | 122 kWh |
| Oct | 5.4 hrs | 58 kWh | 115 kWh |
| Nov | 4.8 hrs | 50 kWh | 99 kWh |
| Dec | 4.6 hrs | 49 kWh | 98 kWh |
| Annual Total | -- | ~674 kWh | ~1342 kWh |
Estimates derived from historical National Renewable Energy Laboratory (NREL NSRDB) solar radiation averages across weather stations in Hawaii, modeling an 86% system performance ratio.
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