CALSEIA Contractor Day
Selling Storage
Presented by: Magnus Asbo
Why Storage?
© SolarEdge
WhyStorage?
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Provides backup power in case of
grid disconnec5on
Supports grid func5onality while
connected to the grid
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Saves money with changing
u5lity rates: TOU, NEM, Export
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Insulates customer from the
uncertainty of future rate
changes
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Backup Power
SelfConsumption
No Grid Electricity
Important loads are
powered by the PV
system and the
battery
Important loads are
powered by the
battery
© SolarEdge
BackupPoweratWork
Grid is on
Charge battery
from PV system
No Grid Electricity
Daytime: Important loads
are powered by the PV
system & battery
Nighttime: Important loads
are powered by the
battery
During long power outages, the battery
can be charged by the PV system
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© SolarEdge
StorEdgeSolu,onwithBackupPower
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Automa(cally provides backup power
to pre-selected loads in case of grid
interrup(on, in addi(on to maximizing
self-consump(on
Requires a single StorEdge inverter for
baBery management and on-grid PV
Monitoring plaForm displays
consump(on & baBery status
Not an off-grid solu(on
Compa(ble with the Tesla Powerwall
Home BaBery and LG RESU BaBery
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When used exclusively for backup, baBery capacity is
80% to maintain life(me. It will be charged to 100%
capacity during power outages, if PV is available
‹#›
© SolarEdge
Selec%ngBackupLoads
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Supports backed-up loads (not the full house)
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Homeowner & Installer determine backup loads
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Separate electrical panel required
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Requires home wiring work
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Backup load examples:
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Refrigerator, microwave, lights, TV, router
Several AC outlets (for device charging)
Sump pump - 1/2hp
© SolarEdge
BackupLoadSizing
•LoadShow table with runningOperating
wa1s and
wa1s
Powersurge
(W)
Surge Power (W)
•Refrigerator/freezer
Show equa5on with example on
700 how to size these
2200
½ HP Furnace Fan
800
2350
Television
500
0
Window AC
1200
1800
Sump Pump, ½ HP
1050
2200
Sources:
http://offgridsurvival.com/
http://www.generatorjoe.net/
http://www.homepower.com/
Figures are illustra5ve only : check manufacturer specifica5ons for individual installa5ons
‹#›
© SolarEdge
HowMuchDoesaBlackOutCost?
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Food loss: $173.37 (1)
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Refrigerator loss: $800 - $13,000
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Hotel fees: $90-250/night (2)
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Flood damage: $20,920 (3)
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Total: $1k - $10k’s
(1)
(2)
(3)
http://www.moneysense.ca/columns/prevent-food-spoilage/
Hotels.com HPI
The Cost of Flooding: www.floodsmart.gov) 2,000sqft home, 1”
flood) flooring damage, cleaning,
‹#›
© SolarEdge
SupportDuringaBlackOut
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New HP StorEdge Inverter:
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Power the refrigerator
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Hotel fees: $90-250/night (2)
Power sump pumps, charge power tools
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Food loss: $173.37 (1)
Refrigerator loss: $800 - $13,000
Power the lights, phone chargers, entertainment,
space heater
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5kW with 6.6kW surge
Flood damage: $20,920 (3)
PV runs home when sun is up and/or recharges
baSery
© SolarEdge
MaximizingSelf-Consump4on
Morning
Noon
Evening
Excess Energy
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A storage system is set up to maximize the amount of solar energy used
by the homeowner to enable energy independence
Unused PV power is stored in a ba=ery and used when needed
© SolarEdge
ValueofGridTiedStorage
Sources of savings
A)
PV produced and used
immediately
B)
PV stored and used later
C)
PV sold to grid
C
A
‹#›
B
© SolarEdge
ProfileProgramming
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Charge the ba+ery when electricity prices are low
Discharge to supply the house when they are high
Every profile is divided into 15 min segments
During each segment the system operates according to
one of seven charge/discharge modes:
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No ba+ery charging/discharging
Charge ba+ery with PV power which is not self-consumed
Charge ba+ery with PV power unEl full
Charge ba+ery with PV power and grid power unEl full
Discharge ba+ery unEl the inverter reaches its AC limit
Discharge ba+ery for self-consumpEon, not export to grid
Charge/discharge ba+ery as needed to maximize selfconsumpEon
(Can set a backup reserve as well)
© SolarEdge
Example:StackinguptheQuarters
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Electricity sold c/kWh
Assume TOU rate: day is 10c/kWh (9am-5pm) and night is 35c/kWh (5-9pm)
A) Worth 10c/kWh
C) Worth 10c/kWh
B) Worth 35c/kWh
Gap in kWh = 25 c/kWh
© SolarEdge
StackinguptheQuarters
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Gap in kWh = 25 c/kWh or 1 quarter
Ba8ery spec: kWh = # of quarters / day
Assume 10kWh ba8ery
10kWh X 25c/kWh = $2.50 / day
2,600* X $2.50 = $6,500
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Note:
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*2,600 = 10 years, 365 days / year, 90% (80% kWh end of warranty), 80% uPlizaPon
Need to run for specific TOU schedules
Run for different rate periods: Summer vs. Winter
Check home total loads for o]ake
Check PV system size for kWh producPon
© SolarEdge
DotheNewBa+eriesPencilOut?
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One 14kWh ba-ery (13.5kWh)
Assume 25c/kWh gap and yearly TOU
Daily: 13.5kWh X 25c/kWh = $3.37
2,600 X $3.37 = $8,700
+ Value of backup = $1,000 to $10,000
https://www.tesla.com/powerwall
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New California TOU Rates coming
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Pushing TOU high rates to 4-10pm range
EV rates have show ~20c/kWh gaps
© SolarEdge
OtherConsidera.ons
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Value of warranty
Non-economic drivers
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Early adopters
Grid independence
Brand recogni<on
Aesthe<cs
Loca<on (Indoor / Outdoor)
© SolarEdge
THANK
YOU!
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Cautionary Note Regarding Market Data & Industry Forecasts
This power point presenta.on contains market data and industry forecasts from certain third-party sources. This informa.on is based on industry surveys
and the preparer’s exper.se in the industry and there can be no assurance that any such market data is accurate or that any such industry forecasts will
be achieved. Although we have not independently verified the accuracy of such market data and industry forecasts, we believe that the market data is
reliable and that the industry forecasts are reasonable.
© SolarEdge