Pick your chemistries
1
Choose 2 or 3 to compare
Battery chemistry & storage
Battery chemistry quick comparison tool
Pick two or three chemistries. Get a fast snapshot of cost, cycle life, efficiency, density, and fire risk side by side.
How it works
Three steps to a fast snapshot
Step 1
Shortlist two or three chemistries
Pick the options you're genuinely considering rather than every chemistry at once, to keep the snapshot easy to read. The lithium vs lead acid comparison is a good starting pair if you're just beginning to narrow things down.
Step 2
Scan the snapshot for the factor that matters most to you
Cost, cycle life, efficiency, density, and fire risk rarely all favor the same chemistry, so decide upfront which one is your priority.
Step 3
Follow up with a dedicated tool for your top priority
This snapshot is a starting point. The total cost of ownership comparison and other tools throughout this hub go much deeper on any single factor.
Understanding your quick comparison
What this snapshot includes
This comparison pulls together cost per kWh, cycle life, round trip efficiency, energy density, and a relative fire risk rating into one table, using typical figures for a 10 kWh usable system cycled daily. It's built to give a fast first impression across the factors most people ask about first, not a full analysis of any single one. If your actual use case is closer to backing up a handful of essentials than cycling a full home daily, the critical loads only sizing calculator is worth running first, since it changes which of these metrics should carry the most weight.
Why no chemistry wins on every metric
NMC tends to lead on energy density, flow posts both the lowest cost per year and the longest rated cycle life of the six in this table, and LFP, sodium-ion, and saltwater all tie for the lowest fire risk rating, which is exactly why a single blended score would hide more than it reveals. Flow's low cost per year comes with a much higher upfront price and a far larger footprint, which is usually what keeps LFP the more practical default despite not winning that one number outright, a multi-factor tradeoff NREL's energy storage research studies across all six chemistries and more. Comparing the individual metrics side by side, as this tool does, keeps those tradeoffs visible instead of collapsing them into one number.
Why this is a starting point, not a final answer
Real decisions depend on your specific usage pattern, climate, budget, and installation constraints, none of which this generic snapshot captures in detail, the same reason the DOE's Office of Electricity evaluates storage technology choices against project-specific requirements rather than generic rankings. Use it to narrow your shortlist to one or two chemistries, then move to the specific comparison tools throughout this hub, like the energy density comparison or fire risk comparison, for a decision-ready answer.
What to check next
Once you've narrowed to a top choice, the total cost of ownership comparison gives the fullest single number for validating that pick against your actual usage pattern. Chemistry and inverter have to agree. The quick inverter size estimator in our Inverters & Equipment section can help you size the inverter for the battery you have picked.
Questions
Frequently asked
This quick comparison tool puts cost per kWh, cycle life, round trip efficiency, energy density, and fire risk for two or three chosen chemistries side by side in one snapshot table, giving a fast overview before diving into a deeper single-topic comparison tool for whichever factor matters most.
Treat it as a starting point rather than a final answer, since it uses typical published figures rather than certified specs for a specific product, and it doesn't account for your particular usage pattern, climate, or budget. Follow up with the dedicated comparison tools linked throughout this hub for the factors that matter most to your project.
Keeping the comparison to two or three chemistries keeps the snapshot readable and focused on your actual shortlist, rather than overwhelming the view with every chemistry at once. If you want the full six-chemistry picture on a single metric, the dedicated comparison tools throughout this hub cover that instead.
It depends entirely on your priorities: cost per kWh and cycle life matter most for budget-driven daily-cycling decisions, energy density matters most for space-constrained installs, and fire risk matters most for indoor or occupied-space installations. No single metric is universally most important.