How Does Solar Energy Lower Energy Usage | Consumption Reduction, Grid Dependence

Photovoltaic can directly replace electricity use, family system (5 kW) annual power generation about 5,000 kWh, can cover 50–80% electricity use; equipped with energy storage (5–10 kWh) can peak shaving and valley filling, reduce grid dependence and lower electricity bill.

Consumption Reduction

Stare data
Installed equipped smart electric meter and millisecond level sampling rate's energy consumption monitor mobile phone application after, family user view electricity use load curve's frequency from every 30 days 1 time surge to average every week 14.5 times. Through view precision reach 0.1 watts (W)'s real-time power distribution statistics chart, users accurately locate account for whole day total electricity consumption amount 9% to 12% standby power consumption equipment.

Unplug 3 units long-term stay in standby mode's old-style TV set-top boxes and 2 units power is 15 watts's routers after, family basic grid background noise power from average 250 watts fall back to 85 watts's lowest value. Statistics 5,000 installed solar energy's independent house samples discovered, in grid-connected operation's first 6 months inside, 78% of families will power is 4.5 kilowatts' tumble dryer and dishwasher's use time, from evening 8 o'clock's electricity price peak period (0.32 dollars/kWh) shift to morning 11 o'clock to afternoon 2 o'clock's photovoltaic output peak period.

Electricity use load time period's shift, let high energy consumption equipment's daytime self-use electricity match rate rise 65%, every month actually reduce from grid extract this kind of equipment's electricity amount to reach 140 kilowatt-hours, time distribution variance's data regression curve present out 50%'s inverted U-shape daytime concentrate trend.

Change equipment
Combine photovoltaic system 240 volts's alternating current (AC) full load output specification, 45%'s users in install photovoltaic after's 24 months inside eliminated thermal efficiency only is 80%'s gas water heater, change to coefficient of performance (COP) high up to 3.5 to 4.0's air source heat pump water heater. In a whole year's operation cycle test middle, a unit rated input power is 1.2 kilowatts's air source heat pump, every day operates 3.5 hours, consumes 4.2 kilowatt-hours of electricity, and prepares out traditional 80 gallons electric water heater to consume 14 kilowatt-hours of electricity to heat to Celsius 55 degrees's same volume of hot water.

Photovoltaic inverter provides maximum 7.6 kilowatts's continuous alternating current flow output, family upgrade high energy efficiency equipment time no need spend 1500 dollars to expand capacity 200 amperes specification's residential main distribution panel. Old-style incandescent lamp by luminous efficiency high up to 120 lumens/watt (lm/W)'s LED light strip completely replace, lighting system's monthly electricity consumption amount from 110 kilowatt-hours cliff-like drop to 18 kilowatt-hours, drop rate reach 83.6%.

Energy consumption comparison table

Save conversion loss
In equipped direct current (DC) coupling technology's hybrid inverter architecture, cell panel produced's 380 volts direct current no need first with 4%'s physical loss rate convert to alternating current (AC), but is directly through built-in's MPPT (maximum power point tracking) charge controller, with 98.5%'s charge efficiency charge into 48 volts's household energy storage cell pack. System for with direct current input port's variable frequency air conditioner supply power time, electrical energy's transmission link bypass alternating current direct current bidirectional rectifier module.

In the environment, the temperature is Celsius 32 degrees's standard test working condition under, directly use photovoltaic direct current drive internal brushless direct current motor (BLDC)'s operation mode, let air conditioner's whole machine actual cooling energy efficiency ratio (EER) number from 11.2 raise to 13.4. A unit rated capacity is 60 kilowatt-hours (kWh)'s pure electric vehicle in connect direct current bidirectional charging pile (V2H/V2G) time, through set charge voltage to 400 volts and match photovoltaic array's real-time maximum current value (15 to 20 amperes fluctuate), single time full charge's total energy dissipation amount from 6.5 kilowatt-hours electricity be strictly compressed to 1.2 kilowatt-hours electricity within. In drive mileage reaches 15000 miles's annual statistics cycle middle, saved down's alternating current direct current conversion energy loss high up to 450 kilowatt-hours.

Grid Dependence

In time-of-use (TOU) electricity price's billing architecture, the public distribution grid's load peak usually concentrates at 4 o'clock in the afternoon to 9 o'clock in the evening. This time period's grid electricity rate often surges to per kilowatt-hour (kWh) 0.45 dollars to 0.58 dollars. A set installed capacity is 8 kilowatts (kW)'s roof photovoltaic array combine 13.5 kilowatt-hours's lithium iron phosphate household energy storage cell, can with physical block's way will family in this high price time period to external grid's power request data drop to extremely low value. System built-in's energy gateway with 1 hertz's frequency real-time sample residential distribution panel's current flow direction distribution, once detect grid billing cycle enter peak time period, inverter will in 50 milliseconds inside will 5 kilowatts's alternating current supply power load seamlessly shift to local cell pack.

In a 30-day standard statistics cycle inside, the system's high frequency algorithm will family from grid extract high price electricity amount's frequency suppress low 92%, monthly average electricity amount degrees from 250 kilowatt-hours compress to not enough 20 kilowatt-hours. Variance analysis data shows, the uninstalled photovoltaic and energy storage family's daytime electricity use curve peak valley range high up to 4.5 kilowatts, while the configured photovoltaic storage system's house, its whole day from the grid extract electricity's power fluctuation standard deviation is forcibly restricted at 0.3 kilowatts within, forming a stick near zero point number's smooth background noise line.

· A unit seasonal energy efficiency ratio (SEER) is 18's central air conditioning at 5 o'clock in the afternoon with 2.8 kilowatts's continuous power full speed operate time, system inverter with 97.5%'s discharge conversion rate from cell extract 3.0 kilowatts direct current, without delay drive compressor, grid side's 200 amperes main circuit breaker measured's extract electricity amperes number maintain at 0A.

· The internal volume is 25 cubic feet's variable frequency refrigerator in peak billing time period inside start compressor, instant produce 1200 watts's startup current load, energy management algorithm will it 100% match cell's instantaneous discharge power output redundancy interval inside.

· Household electric oven at 7 o'clock in the evening with 3.5 kilowatts's high heat load conducts 1.5 hours's food baking, it consumes 5.25 kilowatt-hours of electricity full amount by daytime stored in the cell inside's solar photoelectric energy settle, single time cooking evade about 3.04 dollars's high grid bill amount.

Power outage not disconnect network
Face thunderstorm weather or transformer equipment aging lead to public transmission line physical power outage situation, solar energy plus energy storage system's automatic transfer switch (ATS) possess microsecond level's off-grid cut off reaction rate. When the monitor detects an external grid voltage drop to nominal value 120 volts's 85% (that is lower than 102 volts), or grid frequency deviates from 60 hertz's tolerance range by 0.5 hertz, hardware protection relay will in 15 to 20 milliseconds inside mechanically disconnect with the external distribution grid's physical connection. The system immediately turns into island operation mode, the hybrid inverter immediately takes over the house's main distribution panel, builds a pure 240 volts, frequency fluctuation range smaller than 0.05 hertz's independent micro-alternating grid.

In cell state of charge (SOC) stays at 30% above's safety threshold and daytime has solar radiation's working condition under, roof photovoltaic panel produced's maximum 7.6 kilowatts direct current, same time satisfy indoor real-time load and with highest 3 kilowatts's charge rate for cell replenish capacity, support house continuous 72 to 120 hours detach grid independent operate.

· A unit rated power is 800 watts's deep well water pump in island mode, every day starting 6 times, every time operating 15 minutes, producing 1.2 kilowatt-hours's daily electricity consumption amount, the inverter easily provides its start instant needed's 35 amperes locked rotor amperes (LRA).

· Round-the-clock operate's medical grade oxygen concentrator with 400 watts's rated power continuously extracts alternating current, system continuously output stable sine wave power source, supply line's total harmonic distortion (THD) be strictly controlled at 2% below's precision range within.

· Contain optical fiber modem, dual band router, and security camera's network equipment comprehensive background noise load all year round maintain at 50 watts around, cell in night no illumination's 12 hours inside only need release 0.6 kilowatt-hours electricity, then can maintain high up to 99.9% communication network online rate.

Bidirectional electric meter
In follow net metering electricity price (Net Metering) policy's physical settlement logic under, system use installed at house outer wall's bidirectional smart electric meter, accurately statistics family and distribution grid between every second bidirectional flow's current amperes number. In sunshine, the time extends and the outdoor temperature is pleasant in April and May. Family's daytime basic air conditioning energy consumption is extremely low, electricity use power all year round maintain at 200 to 300 watts's low position interval.

At the same time, an 8-kilowatt photovoltaic array at noon sunshine's highest peak can output 6.5 kilowatts's maximum power. Every hour, surplus's 6 kilowatt-hours of electricity amount to 240 volts, 60.05 hertz's strict grid connection specification format, passes through a bidirectional electric meter reverse flow back to the community distribution transformer.

In a 30-day spring month, the photovoltaic system usually will grid physically inject 350 to 450 kilowatt-hours's surplus electricity amount. According to per kilowatt-hour electricity, 0.20 dollars's retail compensation rate, these reverse injected's current in public utility company's settlement database middle accumulate out 70 to 90 dollars's quantitative financial credit quota.

In as long as 12 months' annual true-up account (True-Up) cycle inside, spring and summer two seasons cumulative generate a large amount of negative number electricity bills, in December and January, the average daily consumption of 30 kilowatt-hours of high heating electricity amount's winter be according to equivalent ratio deduct exhausted, prompt whole year 12 periods electricity bill's actual payment total amount median infinite approach to zero point.

Virtual power plant
In the local distribution grid, extreme high temperature weather leads to air conditioning load overload's peak warning period, installed energy storage cell's photovoltaic house can actively participate in regional virtual power plant (VPP) demand response (DR) dispatch plan. Public utility energy company through cloud API interface to household energy gateway batch issue high frequency control command, in afternoon 6 o'clock to evening 8 o'clock's 2 hours emergency window period inside, command household cell pack with 4 kilowatts's constant discharge rate to public grid reverse transmit electrical energy.

By 1,000 independent houses composed's sample pool in one response cycle inside can total release out 8 megawatt-hours (MWh)'s peak load electricity amount, make community substation transformer winding's physical working temperature drop Celsius 4 to 7 degrees. Participate in this kind of grid load peak shaving and valley filling's high frequency discharge interaction, users every to grid transmit one kilowatt-hour electricity usually can obtain 1.50 to 2.00 dollars's excess present time incentive rate. In a contain 15 times grid dispatch command's summer high temperature statistics cycle end after, family users average obtain 250 to 300 dollars's extra cash dividend, whole photovoltaic energy storage hardware equipment's capital investment payback period (Payback Period) data model therefore in time axis on shortened 8 to 14 months.