How It Works
From Sunlight to Stored Power — Here's Exactly How It Works
Solar panels capture energy from California's abundant sun. A smart battery stores it. Your home draws from that stored power — day or night, grid or no grid.
The System
Three Components. One Seamless System.
A modern solar + battery system is simpler than most homeowners expect. Three core components work together automatically — no manual switching, no complicated controls. Just clean, stored energy available whenever you need it.
Solar Panels
Mounted on your roof, solar panels convert sunlight into DC electricity. California averages over 280 sunny days per year — one of the highest solar resources in the country.
Inverter & Controller
The inverter converts DC power to AC electricity your home can use. The smart controller decides in real time whether to use, store, or export power based on your usage patterns and utility rates.
Battery Storage
Excess solar energy is stored in a home battery rather than sent back to the grid at low export rates. That stored energy powers your home during peak-rate hours, evenings, and outages.
Energy Flow
How Your Energy Moves Through the Day
Morning
Panels Wake Up
As the sun rises, your panels begin generating electricity. Your home uses this power directly — running appliances, HVAC, and electronics on free solar energy.
Midday
Battery Charges
Peak solar production typically exceeds your home's midday usage. The excess is directed into your battery, filling it up while rates are low and sun is plentiful.
Afternoon
Smart Shifting
California utility rates spike in the late afternoon and evening. Your smart controller automatically draws from the battery instead of the grid — avoiding the most expensive rate periods.
Night
Battery Powers Home
After sunset, your home runs on stored battery energy. Depending on your system size and usage, your battery can power your home through the night without touching grid power.
Outage
Automatic Backup
If the grid goes down, your system detects the outage in milliseconds and seamlessly switches to battery power. Your lights stay on, your fridge stays cold, and your family stays comfortable.
The Program
The Virtual Power Plant Program — This Is What We Do
California Backup Battery Systems enrolls California homeowners into utility-sponsored Virtual Power Plant programs through SCE, PG&E, SDG&E, and IID. Your battery doesn't just protect your home — it earns you money by selling stored energy back to the grid at premium rates during peak demand events.
What Is a Virtual Power Plant?
A Virtual Power Plant (VPP) is a network of home batteries that utilities like SCE and PG&E coordinate as a single, distributed power source. Instead of building expensive new power plants to handle peak demand — typically hot California summer afternoons — utilities pay enrolled homeowners to dispatch stored energy from their batteries into the grid on demand. Your home battery becomes a revenue-generating asset.
California Utility Programs
SCE (Southern California Edison)
SCE's Connected Solutions program pays enrolled customers for every kWh dispatched during grid stress events, plus ongoing monthly incentives for program participation.
PG&E (Pacific Gas & Electric)
PG&E's Emergency Load Reduction Program (ELRP) and SmartRate programs compensate homeowners for load shifting and grid support during peak summer demand periods.
SDG&E (San Diego Gas & Electric)
SDG&E offers battery storage incentives and demand response credits for San Diego-area homeowners enrolled in qualifying programs.
IID (Imperial Irrigation District)
IID offers battery storage and demand response incentives for Imperial Valley homeowners, helping reduce grid strain during peak desert heat events.
Getting Paid at Premium Rates
Standard net metering pays you the avoided-cost rate for excess solar — typically 2–4 cents per kWh. VPP dispatch events pay at peak demand rates, which can be 5–10x higher. Your battery charges for free using your own solar, then sells that stored energy at the moment it's worth the most.
- VPP dispatch rates during peak events are typically $0.20–$0.50+ per kWh — far above standard export rates
- Most SCE and PG&E programs also pay a monthly enrollment incentive just for keeping your battery available
- Events are short (1–4 hours), automated, and your battery always retains a reserve for your home's backup needs
- Annual earnings vary by system size and event frequency — many homeowners offset their entire financing payment
How a VPP Dispatch Event Works
Grid Stress Detected
SCE or PG&E identifies a peak demand event — typically a hot California afternoon when air conditioners are running full blast across the state.
Utility Sends Signal
The utility sends an automated dispatch signal to all enrolled batteries in the VPP network, requesting energy discharge to the grid.
Your Battery Responds
Your home battery automatically exports stored energy to the grid at the premium dispatch rate. No action required from you — it's fully automated.
You Get Paid
The utility credits your account for every kWh dispatched. Your battery recharges from solar the next day, ready for the next event.
Financing Structure
How the PPA Model Works — Zero Out-of-Pocket
A Power Purchase Agreement (PPA) is the financing structure that makes this program accessible to most homeowners with no upfront cost. Instead of buying the solar and battery system outright, you agree to purchase the power it produces at a fixed, below-market rate for the term of the agreement — typically 20–25 years.
The system is installed on your home at no cost. You pay only for the electricity it generates, at a rate locked in below what you currently pay the utility. Meanwhile, the VPP program earnings flow back to offset your payments — in many cases dramatically reducing or eliminating your net energy cost.
PPA / Lease
- $0 upfront installation cost
- Fixed rate below your current utility rate
- Maintenance and monitoring included
- VPP earnings credited to your account
Own Outright
- Full system ownership from day one
- Maximum long-term savings and ROI
- Federal tax credit (ITC) eligibility
- VPP earnings go directly to you
Your Rate Is Locked In
Utility rates in California have increased an average of 3–5% per year. Your PPA rate is fixed at signing — so every year the grid gets more expensive, your savings grow wider.
The System Stays Maintained
Under a PPA, the system provider is responsible for performance. If panels degrade or equipment fails, it gets repaired or replaced — at no cost to you.
VPP Earnings Offset Your Payments
Because your battery participates in the VPP program, the earnings it generates are applied against your PPA payment. Many homeowners end up paying little to nothing net each month.
Transferable If You Sell
PPAs are transferable to a new homeowner. A solar + battery system with an active VPP enrollment is a documented value-add that can increase your home's appeal and sale price.
Smart Monitoring
Full Visibility. Total Control.
Every California Backup Battery Systems installation includes real-time monitoring through a dedicated app. See exactly how much energy your panels are producing, how much is stored in your battery, and how much your home is consuming — at any moment, from anywhere.
Real-Time Production
Live solar generation data updated every few seconds.
Battery State of Charge
Always know exactly how much backup power you have available.
Home Consumption
See which appliances and circuits are drawing the most power.
Grid Interaction
Track when you're importing from or exporting to the grid.
Historical Reports
Monthly and annual summaries of production, savings, and usage.
Outage Log
A record of every grid outage and how your battery responded.
The Process
What to Expect: From Assessment to Activation
Free Home Energy Assessment
A California Backup Battery Systems specialist evaluates your home's energy usage, roof condition, utility rate structure, and available programs. No cost, no obligation.
Custom System Design
We design a system sized specifically for your home — accounting for your usage patterns, roof orientation, shading, and backup power goals.
Permitting & Utility Approval
We handle all permit applications and utility interconnection paperwork. This typically takes 2–6 weeks depending on your utility and municipality.
Professional Installation
Our certified installation team completes most residential installations in 1–2 days. We handle everything from panel mounting to battery installation.
Inspection & Activation
After a final inspection by your local authority, your utility activates the interconnection and your system goes live. We walk you through the monitoring app and answer every question.
Get Started
Ready to See How This Works for Your Home?
Every home is different. Get a free, no-obligation assessment and we'll show you exactly what a system would look like for your specific home, usage, and utility.