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Energy Independence

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Article 72: Energy Independence

The Grid Is a Leash

Every month, a bill arrives. Every month, you pay for electricity you cannot live without. Every month, you fund a corporation that does not serve you.

The electrical grid is not neutral infrastructure. The grid is control. The grid is dependency. The grid is a leash that keeps you compliant.

When the grid fails, you fail. When the corporation raises rates, you pay. When the corporation decides to shutoff, you have no power. When the corporation decides to monitor your usage, you have no privacy.

Energy independence means generating your own power. Energy independence means storing your own power. Energy independence means not depending on corporations that do not serve you.

Understanding Your Energy Needs

Audit Your Consumption

Before you can become independent, you must know what you use.

Find your usage:

  • Look at your electric bill (kilowatt-hours per month)
  • Divide by 30 for daily usage
  • Divide by 24 for average hourly usage

Typical household usage:

  • Small efficient home: 10 to 20 kWh per day
  • Average American home: 30 to 40 kWh per day
  • Large home with AC: 50 to 100+ kWh per day

Breakdown by appliance:

  • Refrigerator: 1 to 2 kWh per day
  • Lights (LED): 0.5 to 1 kWh per day
  • Computer: 0.5 to 1 kWh per day
  • Washing machine: 0.5 to 1 kWh per load
  • Electric stove: 1 to 2 kWh per hour
  • Electric water heater: 3 to 5 kWh per day
  • Air conditioning: 3 to 10 kWh per day (seasonal)
  • Electric heat: 10 to 50 kWh per day (seasonal)

Reduce Before You Generate

The cheapest energy is the energy you do not use.

Immediate reductions:

  • Switch to LED bulbs (75 percent less energy)
  • Unplug devices not in use (phantom load)
  • Use power strips (easy to turn off multiple devices)
  • Wash clothes in cold water
  • Air dry clothes when possible
  • Use natural light when possible

Medium-term reductions:

  • Upgrade to energy-efficient appliances
  • Add insulation to reduce heating and cooling needs
  • Seal air leaks
  • Install programmable thermostats
  • Use ceiling fans instead of AC when possible

Long-term reductions:

  • Passive solar design (for new construction or major renovation)
  • Earth tubes for pre-conditioning air
  • Thermal mass for temperature regulation
  • Super-insulation standards

Goal: Reduce consumption by 50 percent before sizing your system. This cuts your system cost in half.

Solar Electric: Photovoltaic Systems

How Solar Works

Photovoltaic panels convert sunlight directly to electricity. This electricity can be used immediately, stored in batteries, or sent to the grid.

System Types

Grid-tied systems:

  • Connected to utility grid
  • No batteries required
  • Excess power sent to grid (net metering)
  • Power from grid when solar is not producing
  • Shuts off during grid outages (safety requirement)
  • Most common and least expensive
  • Cost: $15,000 to $30,000 for average home (before incentives)

Off-grid systems:

  • Not connected to utility grid
  • Requires batteries for storage
  • Requires backup generator or oversized system
  • Complete independence
  • More expensive due to batteries
  • Cost: $30,000 to $80,000+ for average home

Hybrid systems:

  • Grid-tied with battery backup
  • Can island during outages
  • Best of both worlds
  • Most expensive option
  • Cost: $40,000 to $100,000+ for average home

System Components

Solar panels:

  • Convert sunlight to DC electricity
  • Typical residential panel: 300 to 400 watts
  • Typical system: 5 to 20 kW (15 to 60 panels)
  • Lifespan: 25 to 30 years
  • Efficiency degrades about 0.5 percent per year

Inverters:

  • Convert DC to AC (household electricity)
  • String inverters: one inverter for multiple panels
  • Microinverters: one inverter per panel
  • Lifespan: 10 to 15 years (may need replacement)

Batteries (for off-grid or hybrid):

  • Store energy for use when solar is not producing
  • Lead-acid: cheaper, shorter lifespan (5 to 10 years)
  • Lithium-ion: more expensive, longer lifespan (10 to 15 years)
  • Capacity measured in kWh
  • Typical home needs 10 to 30 kWh of storage

Charge controllers (for off-grid):

  • Regulate charging of batteries
  • Prevent overcharging
  • MPPT (maximum power point tracking) is most efficient

Mounting systems:

  • Roof-mounted: most common
  • Ground-mounted: easier maintenance, better orientation
  • Tracking systems: follow the sun (more expensive, more energy)

Sizing Your System

Step 1: Determine daily energy needs.

  • Example: 20 kWh per day

Step 2: Determine sun hours for your location.

  • Southwest US: 5 to 6 sun hours per day
  • Northeast US: 3 to 4 sun hours per day
  • Use PVWatts calculator (pvwatts.nrel.gov)

Step 3: Calculate system size.

  • Daily needs / sun hours = kW needed
  • 20 kWh / 4 sun hours = 5 kW system
  • Add 25 percent for losses: 6.25 kW system

Step 4: Calculate battery storage (if off-grid).

  • Days of autonomy x daily needs = storage needed
  • 3 days x 20 kWh = 60 kWh storage
  • Account for depth of discharge (50 percent for lead-acid, 80 percent for lithium)
  • 60 kWh / 0.8 = 75 kWh lithium battery bank

Solar Economics

Costs:

  • Grid-tied: $2.50 to $3.50 per watt installed
  • Off-grid: $5 to $10 per watt installed (includes batteries)
  • Federal tax credit: 30 percent through 2032
  • State and local incentives vary

Payback:

  • Grid-tied: 5 to 10 years typical
  • Off-grid: harder to calculate (value of independence)
  • After payback, electricity is essentially free

Net metering:

  • Utility credits you for excess power
  • Rates vary by utility and state
  • Some utilities are reducing or eliminating net metering
  • Check local policies

Solar Thermal: Hot Water and Heat

Solar Hot Water

Solar thermal systems use sunlight to heat water directly.

System types:

  • Passive systems: no pumps, simpler, less efficient
  • Active systems: pumps circulate fluid, more efficient
  • Direct systems: water is heated directly
  • Indirect systems: heat transfer fluid heats water through exchanger

Components:

  • Collectors (flat plate or evacuated tube)
  • Storage tank
  • Pump (for active systems)
  • Controller
  • Backup heater (for cloudy days)

Benefits:

  • 50 to 80 percent reduction in water heating costs
  • Simpler than photovoltaic
  • Lower cost per energy unit
  • Payback: 5 to 10 years

Cost:

  • $3,000 to $8,000 installed
  • Federal tax credit available
  • State incentives may apply

Solar Space Heating

Solar thermal can heat your home.

Passive solar:

  • South-facing windows
  • Thermal mass (concrete, tile, water) stores heat
  • Overhangs block summer sun
  • Built into design (hard to retrofit)
  • No mechanical systems

Active solar:

  • Solar collectors heat fluid
  • Fluid circulates through radiators or floor
  • Requires pumps and controls
  • Can be retrofitted
  • More complex

Solar air heating:

  • Simple DIY systems
  • Collectors heat air directly
  • Fan circulates warm air
  • Good for supplemental heat
  • Low cost

Wind Electric

How Wind Works

Wind turbines convert wind energy to electricity. Wind is more variable than solar but can produce power at night and in winter.

Site Requirements

Wind speed:

  • Minimum: 10 mph average annual wind speed
  • Good: 13+ mph average
  • Check wind maps before investing
  • Local obstacles (trees, buildings) reduce wind

Zoning:

  • Height restrictions may apply
  • Noise restrictions may apply
  • Check local regulations
  • HOA may prohibit

System Types

Small residential:

  • 1 to 10 kW systems
  • Tower height: 30 to 100 feet
  • Cost: $10,000 to $50,000 installed
  • May supplement solar

Large residential:

  • 10 to 100 kW systems
  • Tower height: 80 to 150 feet
  • Cost: $50,000 to $200,000+
  • Can power entire homestead

Wind Economics

Capacity factor:

  • Wind is intermittent
  • Typical capacity factor: 20 to 40 percent
  • 10 kW turbine produces 2 to 4 kW on average

Cost per kWh:

  • Highly variable based on wind resource
  • Good sites: competitive with solar
  • Poor sites: not economical

Maintenance:

  • More moving parts than solar
  • Regular maintenance required
  • Bearing replacement every 5 to 10 years
  • Blade inspection and repair

Best use:

  • Supplement to solar
  • Good in winter when solar is low
  • Good in windy locations
  • Hybrid solar-wind systems

Micro-Hydro Electric

How It Works

Running water turns a turbine, which generates electricity. Micro-hydro is the most consistent renewable energy source (water flows 24/7).

Requirements

Water source:

  • Stream or river on property
  • Consistent flow (year-round)
  • Legal right to use water

Head:

  • Vertical drop from intake to turbine
  • More head = more power
  • Minimum: 10 feet of head
  • Good: 50+ feet of head

Flow:

  • Volume of water (gallons per minute)
  • More flow = more power
  • Minimum: 10 GPM
  • Good: 50+ GPM

Power calculation:

  • Power (watts) = Head (feet) x Flow (GPM) / 10 (rough estimate)
  • 50 feet head x 50 GPM / 10 = 250 watts continuous
  • 250 watts x 24 hours = 6 kWh per day

System Components

Intake:

  • Screens to keep out debris
  • Diverts water from stream
  • Must allow fish passage (regulations)

Penstock:

  • Pipe from intake to turbine
  • Must withstand pressure
  • Proper sizing for flow

Turbine:

  • Pelton wheel (high head, low flow)
  • Turgo (medium head and flow)
  • Crossflow (low head, high flow)
  • Converts water energy to mechanical energy

Generator:

  • Converts mechanical energy to electricity
  • AC or DC output
  • Matches turbine speed

Controller:

  • Regulates output
  • Protects battery bank (if off-grid)
  • Dumps excess power

Micro-Hydro Economics

Cost:

  • Small systems (100 watts to 1 kW): $2,000 to $10,000
  • Medium systems (1 to 10 kW): $10,000 to $50,000
  • Large systems (10+ kW): $50,000 to $200,000+

Advantages:

  • Continuous power (24/7)
  • Long lifespan (20 to 50 years)
  • Low maintenance
  • Best cost per kWh if site is suitable

Disadvantages:

  • Site-specific (not everyone has suitable water)
  • Environmental regulations
  • Water rights issues
  • Intake maintenance (debris, ice)

Energy Storage

Why Store Energy

Renewable energy is intermittent. Solar produces during the day. Wind produces when wind blows. Hydro produces when water flows.

Storage allows you to use energy when you need it, not when it is produced.

Battery Types

Lead-Acid (Flooded):

  • Cheapest option
  • 5 to 10 year lifespan
  • 50 percent depth of discharge
  • Requires maintenance (watering)
  • Ventilation required (off-gassing)

Lead-Acid (AGM/Gel):

  • Sealed, no maintenance
  • 5 to 10 year lifespan
  • 50 percent depth of discharge
  • More expensive than flooded
  • No ventilation required

Lithium-Ion (LiFePO4):

  • Most expensive upfront
  • 10 to 15 year lifespan
  • 80 percent depth of discharge
  • No maintenance
  • Higher efficiency
  • Best long-term value

Nickel-Iron:

  • Very long lifespan (20 to 50 years)
  • Expensive upfront
  • Lower efficiency
  • Tolerant of abuse
  • Niche applications

Sizing Your Battery Bank

Step 1: Determine daily energy needs.

  • Example: 20 kWh per day

Step 2: Determine days of autonomy.

  • How many days without sun/wind?
  • Typical: 3 to 5 days
  • Example: 3 days

Step 3: Calculate storage needed.

  • Daily needs x days of autonomy = storage
  • 20 kWh x 3 days = 60 kWh

Step 4: Account for depth of discharge.

  • Lead-acid: 60 kWh / 0.5 = 120 kWh bank
  • Lithium: 60 kWh / 0.8 = 75 kWh bank

Step 5: Convert to amp-hours (for system voltage).

  • For 48V system: 75,000 Wh / 48V = 1,562 Ah

Battery Management

Charging:

  • Proper charge stages (bulk, absorb, float)
  • Temperature compensation
  • Avoid overcharging

Discharging:

  • Do not exceed depth of discharge
  • Avoid deep discharges (reduces lifespan)
  • Monitor state of charge

Maintenance:

  • Check water levels (flooded lead-acid)
  • Clean terminals
  • Equalize periodically (flooded lead-acid)
  • Monitor temperature

Safety:

  • Proper ventilation
  • Fire protection (especially lithium)
  • Proper fusing and disconnects
  • Professional installation recommended

Backup Generators

Why Have Backup

Even the best renewable system may need backup:

  • Extended cloudy periods
  • Low wind periods
  • Equipment failure
  • Unusual energy demands

Generator Types

Gasoline:

  • Common and inexpensive
  • Short shelf life for fuel (6 to 12 months)
  • Good for occasional use
  • 5 to 10 kW typical for residential

Propane:

  • Long shelf life (indefinite)
  • Cleaner burning
  • More expensive than gasoline
  • Good for regular backup use

Diesel:

  • Longest lifespan
  • Most efficient
  • Most expensive
  • Best for frequent/regular use
  • Fuel storage considerations

Natural gas:

  • Unlimited fuel (if grid-connected)
  • Clean burning
  • Not independent (depends on gas grid)
  • Good for grid-tied backup

Generator Sizing

Calculate needs:

  • List essential loads
  • Add running watts
  • Add starting watts (motors require 3x running watts to start)
  • Generator should handle both

Example:

  • Refrigerator: 700 running, 2,100 starting
  • Well pump: 1,000 running, 3,000 starting
  • Lights: 500 running
  • Furnace fan: 800 running, 2,400 starting
  • Total running: 3,000 watts
  • Total starting: 7,500 watts
  • Generator needed: 7.5 kW minimum

Generator Best Practices

Installation:

  • Transfer switch (prevents backfeed to grid)
  • Proper wiring
  • Ventilation (carbon monoxide)
  • Weather protection

Maintenance:

  • Regular oil changes
  • Load testing
  • Fuel stabilization
  • Regular exercise (run monthly)

Fuel storage:

  • Store 1 to 2 weeks of fuel
  • Rotate fuel (use and replace)
  • Proper containers
  • Safe storage location

Energy Independence Strategy

Phase 1: Reduction (Months 1 to 6)

  • Audit energy usage
  • Reduce consumption by 50 percent
  • Implement efficiency measures
  • Change behaviors

Phase 2: Solar Basic (Months 6 to 18)

  • Install grid-tied solar system
  • Learn how solar works
  • Monitor production and usage
  • Build knowledge

Phase 3: Storage Addition (Months 18 to 36)

  • Add battery backup
  • Become hybrid system
  • Practice islanding during outages
  • Increase independence

Phase 4: Full Off-Grid (Year 3 to 5)

  • Disconnect from grid (if desired)
  • Add additional generation (wind, hydro)
  • Add backup generator
  • Complete energy independence

Get Started: Your Energy Independence Plan

This week:

  • Audit your energy usage
  • Identify reduction opportunities
  • Research solar potential (PVWatts calculator)

This month:

  • Implement efficiency measures
  • Get quotes from solar installers
  • Research incentives and financing

This quarter:

  • Install solar system (or begin process)
  • Continue reducing consumption
  • Learn about your system

This year:

  • Have significant solar generation
  • Add battery storage if possible
  • Reduce grid dependency by 50+ percent

Five-year vision:

  • Complete energy independence
  • Multiple generation sources
  • Adequate storage
  • Backup systems
  • Teaching others

Resources for Further Learning

  • Home Power Magazine archives
  • Solar Power World resources
  • Wind Powering America
  • Micro-Hydro Power: A Beginners Guide
  • Local solar installers (get multiple quotes)
  • Energy.gov renewable energy resources
  • Off-grid living forums and communities

Closing: Power Is Yours to Generate

The grid is a leash. Cut it.

Generate your own power. Store your own power. Control your own power.

Solar. Wind. Hydro. Storage. Backup.

You do not need the corporation. You do not need the grid. You do not need permission.

Generate your independence.

Power your own life.