Tesla Powerwall 3 vs Enphase IQ Battery 5P

Should I choose a Tesla Powerwall 3 or an Enphase IQ Battery 5P?

The Tesla Powerwall 3 and the Enphase IQ Battery 5P solve different problems. The Powerwall 3 holds 13.5 kWh and delivers 11.5 kW continuously, so a single unit can carry large loads including central air conditioning in many homes. The IQ Battery 5P holds 5.0 kWh and delivers 3.84 kW, so a single unit suits essential loads and is designed to be stacked in small steps. If you want whole-home backup from one box, the Powerwall is the shape that fits; if you want to start small, add incrementally, or retrofit to existing solar, the Enphase is.

Side by side

Every row is an attribute that changes the decision, with the reason it matters.
	Tesla Powerwall 3	Enphase IQ Battery 5P	Why it matters
Usable capacity	13.5 kWh	5.0 kWh	Sets how long a given set of loads can run before the battery is empty.
Continuous output	11.5 kW (on-grid)	3.84 kW	Sets what can be switched on at once. This is the number that decides whether central air conditioning is realistic on one unit.
Peak output	Higher off-grid continuous rating available	7.68 kW for 3 seconds	Covers motor starting surges, which is where undersized systems typically fail.
Chemistry	Lithium iron phosphate (LFP)	Lithium iron phosphate (LFP), cobalt-free	Both use LFP, generally favoured for thermal stability and cycle life over older lithium chemistries — a meaningful consideration in Florida heat.
Coupling	DC-coupled with an integrated solar inverter	AC-coupled with embedded microinverters	DC coupling suits a new combined system. AC coupling is the simpler path when adding storage to solar you already have.
Warranty term	10 years	15 years, stated at up to 6,000 cycles	Longer cover reduces long-run risk, though the retained-capacity terms inside the warranty matter as much as the headline number.
Expandability	Add further units for more capacity, subject to electrical design	Designed to stack in 5 kWh increments	Determines whether you can start small and grow, or need to size correctly at the outset.
Granularity	Large steps: one unit is already substantial	Small steps: capacity and output are bought in increments	Small increments avoid paying for capability you do not need, but reaching high output requires several units.

Who each one suits

Tesla Powerwall 3: Homeowners who want whole-home backup including air conditioning from a single unit, and who are installing solar and storage together as one system.
Enphase IQ Battery 5P: Homeowners backing up essential loads, retrofitting storage to an existing array — particularly an Enphase one — or wanting to add capacity gradually.

The comparison that actually decides it

Most product comparisons lead with capacity, because it is the biggest number on the datasheet. For backup in Florida, continuous output is usually the deciding specification. Air conditioning is the load that matters most in an August outage, and it is a power problem before it is an energy problem.

At 11.5 kW, a single Powerwall 3 is in the range where central cooling is plausible for many homes. At 3.84 kW, a single IQ Battery 5P is not — and no amount of additional stored energy changes that. Multiple 5P units raise output as well as capacity, which is the intended path to a larger system.

Retrofit versus new build

If you already have solar, coupling type may matter more than either headline spec. An AC-coupled battery sits alongside your existing inverter. A DC-coupled product generally means reworking or replacing it. For a homeowner with a functioning array, that difference can outweigh the datasheet comparison entirely.

See which one fits your home

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Common questions

Can I mix the two?

They are different ecosystems and are not designed to be combined in one backup system. Choose the ecosystem that fits your existing equipment and your expansion plans.

Is a longer warranty worth paying for?

It reduces long-run risk, but read what is actually covered. Retained-capacity terms, cycle limits and what the manufacturer must do on a claim vary, and the headline year count is only part of the picture.

How many IQ Battery 5P units equal one Powerwall 3?

On capacity, roughly three reach 15 kWh against 13.5 kWh. On continuous output, three reach about 11.5 kW, which is close to a single Powerwall 3. Whether that is the right way to buy depends on your loads and your budget for the electrical work.

Sources

What each source supports on this page, and when we last verified it. Every source we use, with its freshness policy, is listed in the source register.

Powerwall 3 Datasheet

Tesla

Powerwall 3 energy capacity, continuous output, and warranty term.

Verified August 16, 2026

IQ Battery 5P data sheet

Enphase Energy

IQ Battery 5P usable capacity, continuous and peak output, chemistry and warranty.