Customer Self Supply Solar Maui

Maui Customer Self Supply (CSS)

With MECO's "Customer Self Supply" (CSS) program, you keep all excess energy on site by storing it in your battery. Use the Sun's energy during the day and the stored energy from the battery at night to massively reduce your electric bill. MECO will provide additional energy to your home if the battery is low. This program gives you the option of having battery backup, in the event of a power outage. This is more commonly referred to as "Self Consumption" in the solar industry. This program is currently open.

Do I Need Batteries?

While you don't actually "need" batteries, to participate in MECO's "Customer Self Supply" program, it is a good idea in most cases. However, in these cases:

  • Home Office
  • Commercial Property
  • Occupants Are Retired
  • The majority of your power usage is during the day, due to air conditioning, pool pumps and/or washer/dryers, etc.

    It can make some sense to forgo using batteries, in the above situations, if the cost outweights the potential savings. In these cases, the inverters only provide enough energy to power the base loads during the day. However, adding even a small battery, in these situations, will maximize your savings.

    But, most people are not at home during the day. In those cases, and the vast majority of the time, it makes sense to have a larger battery, so that you can use all of the energy that was stored during the day, for use in the evenings, night and early mornings. Most of our customers have a payback period of 5-7 years, after taking into account the tax incentives. The tax incentives, combined with high sun hours and high electricity rates, make this program extremely financially lucrative.

  • Which Circuits Should I Backup?

    You may also ask "Do I have to backup?". No, you don't, but the cost is minimal and is around $1,500 in most cases. This is a small cost for such a huge benfit.

    We hear this a lot: "I want to back my whole house". If you have the capital and this is your dream, we can do this for you. However, in most cases, a single LG Chem RESU10 or Tesla Powerwall 2.0 can only output 5kw, with short bursts of 7kw. One of those batteries can power these items:

  • Refridgerator
  • Freezer or 2nd Refrigerator
  • Garage Door
  • Some Lighting
  • A Few Outlets
  • A Small Microwave

    To do more than that, you will need a larger storage system. In some cases, we have installed 2-3 of these types of batteries and backed up "the whole house", with the exception of the oven, clothes dryer and water heating element. Adding additional batteries will also maximize your energy savings. The added cost of 1-2 extra batteries and inverters is worth it for some people to have even more piece of mind, in the event of an extended power outage. A natural disaster, such as a hurricane, tsunami or earthquake could take the power out for many weeks, if not months. The 2006 Hawaii earthquake took the power down on the South side of Maui for three days and hurricane Iniki took out the power on much of Kauai for three months.