Tesla Powerwall 3 vs Enphase IQ vs FranklinWH: 2026 Solar Battery Comparison

If you've decided a battery is worth it (see our honest "do you need one" guide first), there are really only three contenders worth your money in 2026. Here's the spec-by-spec.

## The three contenders

| Spec | Tesla Powerwall 3 | Enphase IQ Battery 5P | FranklinWH aPower | |---|---|---|---| | Usable capacity | 13.5 kWh | 5.0 kWh (stack for more) | 13.6 kWh | | Continuous power output | 11.5 kW | 3.84 kW | 5 kW | | Peak/surge | high (good for AC startup) | moderate | moderate | | Built-in inverter | Yes (solar + battery) | No (uses microinverters) | No | | Chemistry | LFP (lithium iron phosphate) | LFP | LFP | | Warranty | 10 yr | 15 yr | 12 yr | | Typical installed price | ~$11,500 | ~$2,400/unit (need 2-3) | ~$11,000 | | Best for | Whole-home backup + AC | Modular/expandable needs | Whole-home + smart management |

All three use LFP chemistry — safer and longer-cycle-life than older NMC lithium. Good baseline.

## Tesla Powerwall 3

**Strengths:** Highest continuous output (11.5 kW) means it can actually start a central AC compressor — huge in Florida. Built-in solar inverter means fewer components if you're doing solar + battery together. Best price-per-kWh of the three.

**Watch-outs:** 10-year warranty is the shortest here. Tesla's install timelines run long (3-6 months common). You're locked into the Tesla app ecosystem.

**Best for:** Most Florida whole-home backup needs, especially if you want to run AC during an outage.

## Enphase IQ Battery 5P

**Strengths:** Modular — start with one 5 kWh unit, add more later. Industry-best 15-year warranty. Pairs natively with Enphase microinverters (if your solar uses Enphase, this is the seamless choice). Per-panel-level architecture is very reliable.

**Watch-outs:** Lower continuous output per unit (3.84 kW) — you need 2-3 units to run an AC, which raises the total price above Powerwall. Most expensive per usable kWh when stacked.

**Best for:** Homeowners who already have Enphase microinverters, want to start small and expand, or prioritize the longest warranty.

## FranklinWH aPower

**Strengths:** Whole-home backup with excellent smart energy management (the FranklinWH "aGate" handles generator integration, smart load shedding). 13.6 kWh usable matches Powerwall. Growing installer network.

**Watch-outs:** Less brand recognition (matters for resale + long-term support confidence). 5 kW continuous is solid but below Powerwall 3 for heavy AC loads.

**Best for:** Homeowners who want sophisticated load management or plan to integrate a backup generator.

## What I'd pick (Florida)

For most Florida homes wanting hurricane backup: **Tesla Powerwall 3.** The 11.5 kW continuous output is the differentiator — it's the one most likely to actually run your central air during a multi-day outage, which is the whole point in Florida heat. Best price too.

If you already have Enphase microinverters: **Enphase IQ** for the seamless ecosystem + 15-yr warranty, accepting the higher cost.

If you want smart generator integration: **FranklinWH.**

## The install gotchas reps won't mention

1. **One battery rarely powers your whole home for long.** It covers critical loads (fridge, outlets, internet, maybe one AC zone) through an outage. Reps selling "whole-home for days" usually mean 2-3 batteries — confirm the load math. 2. **Backup loads panel.** Most installs put backup circuits on a separate sub-panel. Make sure the circuits YOU care about (fridge, well pump, CPAP) are on it. 3. **The 30% tax credit applies** to the battery if charged by solar — confirm it's on your quote.

## Bottom line

Three good options, all LFP. Powerwall 3 wins on price + AC-starting power for most FL homes; Enphase wins on warranty + modularity; Franklin wins on smart management. Match the battery to your actual backup needs, and don't let a rep oversize you to 2-3 units unless you genuinely need whole-home-for-days.

Got a quote with a battery? I'll tell you if the brand, sizing, and price are right for your home. [reviewingsolar.com/upload](https://reviewingsolar.com/upload).