How many kWh of battery do I need?
Start by identifying critical loads and required backup duration, then calculate energy demand and check compatibility with the inverter and electrical system.
BACKUP & BATTERY
Backup Power & Battery Hybrid
Storage and backup designed from the critical loads that really need power, for homes, businesses, farms and sites with unstable supply.
CHALLENGE
Start from the problem that actually needs solving
Battery selection is not capacity alone. The design needs to know which loads must continue, for how long, and how the existing system can integrate storage.
Best suited to: Homes, businesses, farms and sites that need selected critical loads backed up
ENGINEERING APPROACH
Collect the right data before selecting equipment
- Separate critical loads from general loads
- Define required backup energy and duration
- Review inverter, electrical system and future expansion
- Compare hybrid/backup options against budget and the actual objective
SCOPE
A practical scope for the first site discussion
- Load assessment
- Battery/hybrid concept design
- Installation and protection
- Testing and backup-operation handover
OUTCOME
What should become clearer after the site survey
- Know what will continue during an outage
- Understand backup-system scope and limits
- Select capacity from usage rather than product numbers alone
Equipment, warranty, timeline and pricing are confirmed from verified site information and the final project quotation.
Frequently asked questions
Questions before a Backup Power & Battery site survey
Can the whole home or building be backed up?
It depends on simultaneous load, battery capacity, inverter power and budget. Many projects therefore prioritise critical loads to keep the system practical.
Is Hybrid necessary for every project?
No. If the objective is mainly daytime solar use without backup, On-grid may be sufficient. Hybrid is more relevant when storage or backup is a clear requirement.
Will backup power switch over immediately during an outage?
Transfer behaviour depends on the inverter, transfer equipment and system architecture. Some loads require a shorter transfer time, so critical loads and equipment requirements should be identified during design.
How many hours will the battery provide backup power?
Runtime depends on the actual power demand of selected loads, usable battery capacity and operating conditions. It should not be estimated from battery size alone.
WARRANTY & EQUIPMENT
Project equipment, standards and warranty
The proposed equipment models, relevant standards and warranty conditions are explained clearly for each project.
Equipment & brands
Selected to match the site and approved quotation.
Standards / credentials
Relevant standards or qualification documents are provided according to the proposed work scope.
Warranty
Confirmed separately for equipment, workmanship and manufacturer conditions.
PROJECT PROOF
See the project approach and key details
Before / After images help show the original site condition, the areas improved and the finished workmanship more clearly.
PROJECT INQUIRY
Get a free site assessment plan, with no obligation
Send an electricity bill, site photos, property type or the problem you want to solve. You do not need to know the system size or equipment model first. The team will assess the direction and tell you what to prepare next. It takes about 1–2 minutes.
We have received your information
The A SERVICE team will review the details and contact you to discuss the project. If you would like to talk now, contact us via LINE or phone.