Comparison

Netzero for Powerwall vs SundialEV

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Netzero for Powerwall

Automate your home energy system to maximize savings and monitor your Powerwall's health. Integrate with utility providers for dynamic pricing and receive alerts for solar or battery issues. Gain insights into energy production and use your device as a home energy dashboard.

Highlights
  • Powerwall automation and scheduling
  • Utility tariff integration
  • Solar production monitoring
  • Powerwall health alerts
  • Home energy dashboard
  • Advanced diagnostics
Features
Read full description

Increase savings with Powerwall automation and utility integrations. Connect your energy devices, monitor Powerwall health, and detect solar issues early. Advanced features require a subscription after a 30-day free trial. - Take charge of your Powerwall. Schedule charging, discharging, and backup settings. Export stored energy to the grid when export prices are highest, or before a period of cheap or free electricity. Prevent unnecessary discharge during EV charging and improve efficiency. Automate your home energy with device integrations. - Connect your EV charger, EV, and heating/cooling devices. Pre-heat or pre-cool your home when electricity is cheap, or pause EV charging and heating/cooling during outages. Supports 500+ devices across 50+ brands. - Octopus Energy users benefit from automatic Powerwall charging during Intelligent Octopus Go sessions. Supports Agile Octopus, Tibber, Amber Electric, ComEd Hourly Pricing, and Ameren Power Smart Pricing. Netzero configures Powerwall with live pricing to help cut your bills. - Receive automatic alerts for solar or battery issues. Track Powerwall capacity and degradation to stay within warranty limits. - Get daily, monthly, and yearly production estimates. Spot solar performance issues early. Use the app on your tablet or phone as an always-on home energy dashboard. - Download detailed data, view string-level solar performance, access weather data and developer tools, and enjoy ongoing feature updates. Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

SundialEV

This app intelligently directs surplus solar energy to charge your electric vehicle instead of sending it back to the grid. It helps users save money by avoiding high electricity buy-back rates and utilizing cheaper off-peak charging times. The system is designed for a set-and-forget experience, integrating with existing EV and solar hardware.

Highlights
  • Charges EV with surplus solar
  • Avoids grid export for low rates
  • Set charging floor and battery reserve
  • Works with all Tesla models
  • Coordinates with Powerwall
  • Utilizes off-peak charging
Features
Read full description

Your rooftop solar is worth far more in your car than sold back to the grid. SundialEV automatically charges your EV from surplus solar instead of exporting it for pennies — set it once and forget it. Under "Net billing" electric plans (like NEM 3.0), utilities pay you a few cents for the solar you export, then charge you full price for the same energy at night. Sundial closes that gap: when your panels make more than your home needs, it sends the surplus to your car instead of the grid, saving most users on their electricity bills. • Set-and-forget — pick a charging floor and a battery reserve once; Sundial does the rest • Works with every Tesla model — and with any EV brand via an OCPP smart wall charger, like the Wallbox Pulsar Plus • Reads your production from Tesla, SolarEdge, Enphase solar systems (+ more now) • Coordinates with your Powerwall — you choose how full it gets before the car charges • Tops up on cheap off-peak power on your schedule, and avoids peak-rate windows when solar isn't available • Need range right now? One tap starts a full-speed charge — solar takes back over when it's done • No new hardware — works with the solar, battery, car, and charger you already own

Screenshots

Netzero for Powerwall4 screens
SundialEV4 screens

Verdict

The call

The clearest difference is in-app purchases: SundialEV at none against Netzero for Powerwall's 2. SundialEV also leads on rating (5.0 vs 4.8) and review sentiment (100% vs 90%). Netzero for Powerwall's advantage is ratings volume (794 vs 11). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Netzero for Powerwall sells 2 in-app purchases, starting at $6.99 per month. SundialEV asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SundialEV holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Netzero for Powerwall has 794 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 90% of Netzero for Powerwall's written reviews are positive against 100% of SundialEV's.

UpkeepUpdate frequency

Netzero for Powerwall ships an update weekly, SundialEV every 5 days. The most recent releases landed on October 21, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 5 level
Netzero for Powerwall versus SundialEV: the parameters behind the verdict, then further details
ParameterNetzero for PowerwallSundialEV
PriceFreeFree
Rating4.8 (794 ratings)5.0 (11 ratings) — better
Positive reviews90.4% of reviews100.0% of reviews — better
Number of ratings794 — better11
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS16.416.4
Further details — not scored
Size60 MB42 MB
Age rating4+4+
DeveloperNetzero Labs, IncAppAhead

Customer experience

Netzero for Powerwall

All ratings794 ratings
Positive95.0%
Neutral1.6%
Negative3.4%
Written reviews563 reviews
Positive90.4%
Neutral2.8%
Negative6.7%

SundialEV

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Netzero for Powerwall

Reported bugs

2 issues
  • May not be compatible with PW3
  • Diagnostic screen stays black

Requested features

2 requests
  • stop battery charging?
  • AND function on the conditionality

SundialEV

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Netzero for Powerwall

Subscriptions2
  • Netzero Pro - Monthly$6.991 Month
  • Netzero Pro - Annual$69.991 Year
None

SundialEV

No in-app purchases

Questions

Is Netzero for Powerwall free?
Netzero for Powerwall is free to download, with in-app purchases available.
Is SundialEV free?
SundialEV is free to download, with no in-app purchases.
Which has better reviews, Netzero for Powerwall or SundialEV?
SundialEV is rated higher. Netzero for Powerwall averages 4.8 out of 5 from 794 ratings, while SundialEV averages 5.0 from 11 ratings.
Do Netzero for Powerwall or SundialEV have ads?
Neither Netzero for Powerwall nor SundialEV shows ads.
Which is updated more often, Netzero for Powerwall or SundialEV?
Netzero for Powerwall ships an update weekly, and SundialEV every 5 days. Most recently, Netzero for Powerwall was updated on October 21, 2026 and SundialEV on October 11, 2026.

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