Load selection
Decide which circuits deserve backup: refrigerator, modem, lights, garage door, office, security, and essential comfort.
Battery Backup
The battery is the memory of the sun.
Solar panels make power when the sun is available. Battery backup holds that power for the moments that matter: evening utility hours, grid failures, food protection, communication, lighting, and comfort.
Storage with a purpose
A battery should not be a mystery box on the wall.
The battery has a job. It should store solar energy, support critical loads, reduce dependence on expensive grid power, and give the property a cleaner path through outages.
- Keep selected circuits operating during grid outages
- Store daytime solar production for later use
- Support evening power needs after solar production falls
- Protect refrigeration, lights, internet, phones, and safety loads
- Prepare the home or business for longer utility interruptions
Backup is design
The battery must match the performance.
A battery system is only as good as the plan behind it. The right design depends on the loads, outage goals, inverter capacity, solar production, and customer expectations.
Battery sizing
Size storage around real usage, not vague promises. Overnight needs and outage goals matter.
Inverter planning
The inverter must be able to conduct the performance: solar, storage, grid, generator input where applicable, and protected loads.
Owner clarity
The customer should know what is backed up, what is not, and how the system behaves when the grid disappears.
Critical loads first
Do not waste battery power on the wrong circuits.
During an outage, the battery is the limited performer. It should not be forced to carry every electrical load in the building unless the system has been deliberately sized for that goal.
The disciplined approach is to protect the essentials first, then add comfort loads only when the solar, battery capacity, inverter output, and budget can support them.
Common protected loads
What the battery is usually asked to carry.
The exact list depends on the property, but the usual priority is simple: food, communication, safety, access, and selected comfort.
- Refrigerator and freezer circuits
- Internet modem, router, phones, and office equipment
- Selected lighting circuits
- Garage door opener and gate access where needed
- Security cameras and alarm systems
- Medical equipment and accessibility loads when required
- Selected mini-split or comfort loads when the design allows
The evening act
When the sun leaves, the battery takes the stage.
Solar production fades in the evening, but the home is often still busy: cooking, lighting, homework, refrigeration, computers, entertainment, charging, and comfort. Battery storage gives the system a second movement after sunset.
With the right design, the property is less exposed to expensive utility hours and less fragile when the grid fails.
Battery planning questions
Before choosing equipment, answer the real questions.
What do you want to survive?
Food, phones, lights, security, internet, medical loads, and garage access may matter more than whole-house luxury.
How many hours matter?
A short outage, overnight outage, and multi-day outage are different design problems. Storage should match the expectation.
Will solar recharge it?
Battery backup becomes much stronger when solar can refill the battery during daylight.
What is the inverter limit?
Batteries store energy, but inverters determine how much power can be delivered at one time.
Where will it be installed?
Batteries need safe, code-compliant, accessible locations with clear service pathways.
Can the system expand?
Good planning leaves room for future solar, additional batteries, EV charging, or new electric loads.
Savings and resilience
Battery backup is not only about emergencies.
A well-planned solar battery system can also help the owner use more of their own solar energy and reduce exposure to high-cost utility power periods.
- Use stored solar power after sunset
- Reduce dependence on the grid during expensive hours
- Support critical loads when utility service fails
- Improve the value of the solar array by storing production
- Create a clearer path toward energy independence
The practical promise
The lights should not go out just because the utility did.
Battery backup gives the property a second source of calm. The goal is not chaos, noise, fuel runs, and extension cords. The goal is quiet stored power that is ready before the emergency.
Hold the sunlight
Plan the battery before the blackout.
Tell ABC Solar what must keep running, how long it should run, and whether you want solar recharge, critical-load backup, or a broader energy independence plan.