Tesla Powerwall 3 vs Enphase vs EG4 for Utah Homes (2026)
Last reviewed: 2026-08-29 · Reviewed by Mike Morris, Founder, Ask Solar Mike
Short answer from Ask Solar Mike, a Utah Tesla solar and Powerwall 3 specialist : Tesla Powerwall 3 is the one battery of the three that combines whole-home-class output — 11.5 kW continuous, 48 A maximum continuous current and a 185 LRA motor-start rating, per Tesla's public datasheet — with an integrated 20 kW solar inverter and a place on the PPA program's approved-battery list . Enphase is PPA-approved and well engineered, but a single IQ Battery 5P delivers 3.84 kVA and 16 A continuous per its datasheet — essentials-class output unless you stack several units . EG4 batteries are not on the PPA program's approved list, which changes how most Utah buyers can finance them . The full comparison, with sources, is below.
Which of these batteries can Utah buyers finance the way they expect?
Most Utah battery quotes we see are structured through a PPA — a third-party-ownership program — and that program keeps an approved-battery list . Tesla Powerwall 3 and Enphase IQ batteries are on it; EG4 is not . That is not a knock on EG4's hardware — it is a popular, cost-focused product line — but if you were planning on the PPA route, an EG4 quote usually means paying a different way: cash or a separate loan . Ask about the payment structure before you compare hardware, because it often decides the comparison for you .
What do the datasheets say about power and capacity?
| Per unit | Tesla Powerwall 3 | Enphase IQ Battery 5P | EG4 |
|---|---|---|---|
| Usable energy | 13.5 kWh | 5.0 kWh | varies by model — see manufacturer datasheet |
| Continuous output | 11.5 kW · 48 A max continuous current | 3.84 kVA · 16 A rated output current | see manufacturer datasheet |
| Motor start | 185 LRA load-start capability | Power Start up to 48 A LRA | see manufacturer datasheet |
| Solar input | Integrated solar inverter, up to 20 kW DC, 6 MPPTs | AC-coupled; pairs with IQ microinverters | varies by model |
| Warranty | 10 years | 15 years or 6,000 cycles | see manufacturer datasheet |
| Utah PPA approved list | Yes | Yes | No |
Figures above are from the Tesla Powerwall 3 Datasheet (2025 edition) and the Enphase IQ Battery 5P data sheet (May 2025) — full links in Sources . Read the continuous-output row twice: 48 A versus 16 A per unit is the single biggest practical difference between these systems . On paper, three IQ Battery 5P units (11.52 kVA combined) roughly match one Powerwall 3's continuous rating — you triple the unit count to get there, and land at 15.0 kWh versus 13.5 kWh of storage .
Whole-home or essentials: what does each setup look like?
Powerwall 3 islands the home through a Gateway 3, Backup Switch or Backup Gateway 2 at the service entrance, so a whole-home layout is the default design conversation, and the datasheet supports up to four Powerwall 3 units for larger homes . Enphase is PPA-approved, but its battery's continuous output is a fraction of Powerwall 3's — enough for essentials, not whole-home — so typical single-battery Enphase designs back up selected circuits rather than the whole panel . Neither approach is wrong; they are different products for different outage expectations . Motor starts are the tiebreaker: air-conditioner compressors and well pumps briefly demand far more than their running load, which is why Tesla publishes a 185 LRA load-start figure and Enphase publishes Power Start up to 48 A LRA .
How do the warranties compare?
Credit where due: Enphase warrants the IQ Battery 5P for 15 years or 6,000 cycles, while Tesla's Powerwall 3 warranty is 10 years . If warranty length is your deciding factor, Enphase wins that row; if output, capacity per unit and integrated solar matter more, Powerwall 3 does .
Why does backup capability matter along the Wasatch Front?
Utah outages tend to arrive with weather — canyon wind events, winter storms and summer heat driving peak load . A battery that only carries a few circuits keeps the fridge on; a whole-home-class battery keeps the furnace blower, well pump and garage door in the conversation too . Sizing it correctly is the whole job — a site-specific quote and load review are required .
Springville
Springville sits at the mouth of Hobble Creek Canyon, where wind events are the outages people remember . Utility service varies by address here, and it changes which rebates apply — confirm your serving utility as step one of any battery quote .
Lehi
Lehi's newer, larger homes usually carry 200 A service and bigger HVAC loads, which pushes the whole-home conversation toward Powerwall 3's continuous-output class . Note that Lehi runs its own municipal power utility, so Rocky Mountain Power's Wattsmart battery incentive does not apply there — the net math is different than for RMP addresses .
Provo
Provo homes are served by the city's municipal utility, so Wattsmart does not apply there either, and the housing stock ranges from pre-war homes on smaller services to large east-bench builds . The battery answer differs street by street — which is exactly why we review the panel before we quote .
Who is behind this page?
Ask Solar Mike is a licensed Utah contractor (DOPL #14015846-5501) and a Tesla Certified Installer — verify the current status in Tesla's public installer directory . The team behind Ask Solar Mike brings 2,000+ Tesla solar and battery installs of combined experience . Ask Solar Mike has a 4.9-star Google rating from 46 reviews .
Quick answers before you choose
Can I put an EG4 battery on the PPA program in Utah?
No — EG4 batteries are not on the PPA program's approved list . You can still buy EG4 with cash or outside financing; it just does not ride the PPA route most Utah battery quotes use .
How many Enphase batteries match one Powerwall 3's output?
By the datasheets, three IQ Battery 5P units combine for 11.52 kVA continuous versus one Powerwall 3's 11.5 kW — roughly a match on output, with three times the unit count .
Will one Powerwall 3 start my air conditioner?
Tesla rates Powerwall 3's load-start capability at 185 LRA on the public datasheet; whether that covers your compressor depends on its nameplate, so a site-specific quote and load review are required .
What does a Powerwall 3 cost in Utah?
From Ask Solar Mike: $16,000 installed → $12,000 after the 25% PPA credit → $10,000 after the $2,000 Wattsmart rebate for Rocky Mountain Power customers . Full market context with sources is in our 2026 Utah cost guide .
Not sure which battery fits your home? Take the 60-second fit quiz and I'll point you at the right setup — or skip straight to a call .
Sources
- Tesla Powerwall 3 Datasheet, 2025 edition (13.5 kWh; 11.5 kW; 48 A max continuous current; 185 LRA; 20 kW solar input; up to 4 units; 10-year warranty; read 2026-08-29): energylibrary.tesla.com — Powerwall 3 Datasheet
- Enphase IQ Battery 5P data sheet, DSH-00010-11.0-EN-2025-05-06 (5.0 kWh usable; 3.84 kVA continuous at 240 VAC; 16 A rated output current; Power Start up to 48 A LRA; 15-year or 6,000-cycle warranty; read 2026-08-29): enphase.com — IQ Battery 5P data sheet
- Rocky Mountain Power Wattsmart Battery program terms, effective June 15, 2026 ($2,000 enrollment incentive for a single battery 10 kW or larger): rockymountainpower.net — Wattsmart Battery
