What Size Battery Do I Need?
Choose battery size based on your loads, backup time, and system use.
View Sizing Guides
Buying Guides
Use our buying guides to compare size, runtime, cost, inverter compatibility, installation, and expansion before choosing a product.
Start With Your Question
Start with the decision you need first. These buying guides help you size, check runtime, and confirm inverter fit.
How Long Will a Battery Last?
Check battery runtime before choosing capacity for backup power.
Calculate Runtime
Is This Battery Compatible With My Inverter?
Check voltage, communication, and inverter compatibility before buying.
Check Compatibility
Which Battery Type Should I Choose?
Compare type, installation method, voltage platform, and expansion needs.
Compare Battery Types
What Should I Check Before Buying a Battery?
Check capacity, runtime, inverter compatibility, installation, cost, and future expansion.
View Buying ChecklistBuying Guide Topics
Browse by project type. Our buying guides cover home, solar, commercial, and off-grid storage choices.
What Size Battery Do I Need for My Home?
Compare home capacity, backup loads, runtime, inverter compatibility, and expansion.
View Home Battery Guides
What Battery Works With My Solar System?
Check solar storage size, inverter compatibility, and system expansion.
View Solar Battery Guides
What Battery Size Do I Need for My Business?
Compare commercial sizing, load power, backup time, installation, and storage options.
View Commercial Battery Guides
How Much Battery Storage Do I Need Off-Grid?
Check daily energy use, backup time, solar input, off-grid sizing, and future expansion.
View Off-Grid Guides
Which Battery Type Should I Choose?
Compare wall mounted, rack mounted, stackable, low voltage, and high voltage formats before buying.
Compare Battery TypesFeatured Guides
Read the most-used buying guides on capacity, voltage platform, and inverter compatibility.
10kWh vs 20kWh Battery
Compare capacity, runtime, project fit, and expansion before choosing.
Read Comparison
Low Voltage Battery vs High Voltage Battery
Compare voltage platform, inverter compatibility, system size, and application.
Read Comparison
How to Check Battery and Inverter Compatibility
Check voltage, inverter requirements, and communication before ordering.
Read Guide
How Much Battery Storage Do I Need?
Match storage to real loads, backup time, and system use.
Read Guide
What Should I Check Before Buying a Solar Battery?
Check size, inverter compatibility, installation, cost, and expansion before buying.
Read GuideRelated Tools & Products
Move from the guide list to calculators and product pages when you are ready to decide.
Battery Size Calculator
Calculate capacity from your loads and required backup time.
Calculate Battery Size
Check Compatibility
Check whether the unit fits your inverter and system platform.
Check Compatibility
Commercial Battery Storage
Explore storage for business backup and commercial energy projects.
View Commercial Battery StorageFAQ
What should I check first before buying a battery?
Start with your load list, required backup time, inverter model, installation space, and future expansion needs.
How do I know what battery size I need?
Size should be selected from your real loads and required runtime, not capacity alone.
Should I size the battery by daily use or backup loads?
Use backup loads for backup-only systems. Use daily energy use when the system will also support solar self-use or off-grid operation.
Do I need to check inverter compatibility before buying?
Yes. Check inverter voltage, pack voltage, communication, and system requirements before ordering.
Does battery installation affect which battery I should choose?
Yes. Available space and installation method can determine whether wall mounted, rack mounted, stackable, or another format fits the project.
Can I add more battery capacity later?
Only when the system, inverter, communication, and installation space support expansion.
What should I compare besides battery cost?
Compare usable capacity, runtime, inverter compatibility, installation requirements, warranty, and expansion before making a purchase.