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    HistoryEdited Sep 11, 2012 1:16 PM by admin…

    Energy seminar notes

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    Energy 101: What you need to know as a future energy customer
    Conservation: 8:1 ROI
    Audit-the usual suspects: Hot water heater, fridge, dryer
    Vampire loads: constant lows vs. peak highs
    Profile: use vs. sources

    Sources:
    Solar thermal: hot water only, stored locally, capacity, time to decay, ability to store

    PV: electrical: stored in either the grid or in local batteries

    Wind: less dependable, shorter life, stored in grid or in batteries

    Grid storage: Grid Tie-Net metering vs. Feed in Tariff (FIT)

    Direct DC: pool or water pumps-no HELCO permission needed

    ROI and TCO
    Assume family of four:
    Solar thermal: 2 panels of 4x10, 120 gal storage tank-washing? showers? dishes? other?
    PV: 4 kW at $5/kW installed
    Wind: 2 kW at $5/kW installed
    Audit performed?
    PPA? Grid tie?


    Case studies: Choose one
    In each case, describe what you would do first, second, third and so on, explaining each step, the cost, savings, and ROI/TCO

    Case 1: One income, two kids, Puako:
    You are a parent with two kids, living in Puako (sunny). Your electrical bill is $500/mo. and your income is four times this. You are paying for school, food, rent, transportation, and don't have any to spare.

    Case 2: Dual income, no kids ("DINKS")
    Living in Anekona (lots of sun, wind, and no neighbors). You are building a new home, with a pool, hot tub, and several big screen TVs.

    Case 3: Large family, living in Waimea, wet side
    Two incomes, 6 kids, three teenagers, energy bill is $800/mo. living in an old house built in 1940.

    Case 4: Hotel, 500 rooms, on the coast
    Occupancy rate is 100% in the peak season, not less than 50% in the off season, energy bill is $100,000 per month.


    When? How often? How many hours per day?
    Do you own or rent your house?
    Did you install the PV yourself or get a PPA (purchase power agreement)?

    Summary:
    Ownership vs. stewardship
    Global footprint: August 22 was overshoot day, 2.2 earths