Going Solar

Rooftop Solar (PV)

Hawaiian Electric wants to help our customers who are interested in considering rooftop solar systems, also known as photovoltaic (PV) systems, become more knowledgeable and make informed decisions.  Here are some tips to guide you through each step of the process.


Before considering rooftop solar

Install a solar water heater first
Solar water heating is a smart first step that can save you up to one third of your electric bill. Click here for more information on solar water heating >

Conserve and use energy more efficiently
A Photovoltaic (PV) system is a substantial investment so it is important to reduce your household's electrical consumption as much as possible with energy-efficient appliances and other energy-saving improvements, especially if you are considering a PV system sized to produce all of the electricity that you need. Becoming more energy efficient will reduce the size and cost of the PV system and allow your PV system to meet a greater percentage of your electricity needs.

  • Do you still have one or more old refrigerators that could be removed or replaced with an Energy Star rated model?
  • Are you using energy-efficient light fixtures and CFL or LED bulbs where possible?
  • Instead of using an air conditioner, do you cool your home with shade from trees, a solar attic fan, window awnings or solar curtains?
  • If you have a swimming pool, check the condition and age of your pool pump and consider installing a new, energy efficient model.
  • Where are phantom loads and can they be eliminated?

Looking for more ways to reduce the amount of energy you use and save money? In Hawaiian Electric's Energy Saving Toolkit, you'll find links to our publications and calculators, or call 543-7511 to request copies of the publications.


Getting started

Use our WattPlan tool to understand potential solar savings
This is designed to help you estimate your solar savings potential with a residential rooftop photovoltaic (PV) system.  Find out your estimated solar savings based on your electricity use, current electricity rates and available tax credits and rebates using default rooftop characteristics.  Click here to visit our WattPlan site >

Learn about our Customer Self-Supply (CSS) and Customer Grid-Supply (CGS) solar options
The Hawaii Public Utilities Commission (PUC) approved these rooftop PV programs to support the continued growth of rooftop PV and ensure safe, reliable service and fair treatment for all customers. These programs provide customers with options to install both traditional rooftop PV systems and systems equipped with battery storage systems.  Click here to learn more about our customer rooftop solar programs >

Check our Locational Value Map (LVM) of your area
Our Locational Value Maps (LVM) and address search tools can tell you the levels of distributed generation already on your local circuit.  Click here for LVM check >

Additional technical details
Do your homework and learn a little bit more about PV options, calculations, jargon, installation options, etc.  Learn more about PV details >


Installing and connecting to the grid