Comparison

PV Solar Tilt vs Erebus Solar

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

Head to head
About

PV Solar Tilt

Determine the ideal tilt angle for your photovoltaic system to maximize electricity generation. This app provides solar data, optimization tools, and an on-site inclinometer to ensure your panels are optimally positioned for your location.

Highlights
  • Solar data charts
  • Tilt vs azimuth optimization
  • Optimal tilt angle for any location
  • Optimal orientation
  • Monthly, daily, and hourly tilt optimization
  • On-site inclinometer
Features
Read full description

Simple and accurate determination of the optimal PV tilt angle. Make your PV System generates maximum electricity for your desired location. The wrong position of your PV System can cause losses in electricity generation and your project feasibility may be a question. With this App you will obtain: - Solar Data charts (elevation, azimuth, sunrise, sunset time, noon time, sunlight duration, etc.) - Tilt vs azimuth optimization (find the ideal tilt angle for any chosen azimuth) - Optimal Tilt angle for any desired location on the map - Optimal orientation - Optimal monthly tilt angle - Optimal daily tilt angle - Optimal hourly tilt angle - On-site inclinometer for measuring angles The tilt angle of the panels is one of the most important parameters for your PV system. It is the angle at which the photovoltaic panels are set to face the sun relative to a horizontal position. The panels must have appropriate tilt angle, set for gaining maximum possible electricity from your PV system for your location. PV Solar Tilt is using optimization model for obtaining the most appropriate tilt angle of your panels in order to gain maximum electricity generation from your system. The model is based on sophisticated simulations for maximizing energy yield for a given location. If you need any assistance or clarification, please let us know at support@pvsolcast.com. For more information, please visit our website: www.pvsolcast.com. For super accurate PV Solar Forecasting with unlimited PV Plants in your portfolio, please visit our solar platform: https://elex.mk/solar-forecast Privacy policy link: https://sites.google.com/view/pvstilt/home Terms and conditions link: https://sites.google.com/view/pvfterms/home

About

Erebus Solar

This app helps solar professionals measure on-site shade using their phone's sensors. It generates horizon files compatible with leading PV design software, aiding in accurate solar production estimates.

Highlights
  • AR sun path visualization
  • Automatic sky capture
  • Sky Editor for obstruction tracing
  • Annual solar access analysis
  • PDF shade report export
  • Horizon file generation for design tools
  • Project organization by site
Features
Read full description

Measure shade on site with the hardware already in your pocket. Erebus Solar was designed by an electrical engineer and an architect with years of experience designing solar systems around the world. We were fed up with the horizon-finding hardware the industry still relies on: dedicated devices that haven't been meaningfully updated in decades, are slow to use and slow to find a GPS fix, and analog tools that need paper, a pencil and a latitude template that may not exist for your site. Erebus Solar is our answer. Your iPhone already has the camera, compass and sensors the job needs. WHY HORIZON FILES MATTER Far-field shading from trees, terrain and neighbouring buildings is one of the largest sources of error in a PV production estimate. A measured horizon profile, captured on site, lets your design software model that shading instead of guessing. Erebus Solar produces horizon files that leading PV design tools such as HelioScope and PVsyst read directly, and PV*SOL accepts the same convention. CAPTURE • AR sun path: today's arc, the solstice and equinox arcs and the live sun drawn over the real sky • Tap the real sun to calibrate the compass to true north • Automatic sky capture: sweep the envelope band and frames capture themselves, no buttons • Sky Editor: review the stitched sky and trace obstructions by hand, so the report reflects what you saw ANALYSE • Annual solar access and TSRF for each array area • Month-by-month charts and the sun-path chart with your obstructions • Aerial view with each area's boundary and the solar envelope over satellite imagery EXPORT • PDF shade report with your company name and logo • Horizon files for HelioScope, PVsyst and PV*SOL, generated from the same capture • Share straight from the phone ORGANISE • One project per site, located by address or GPS, with status from Created to Completed • Areas for each roof face or ground section • Everything stored on your iPhone: no account, no upload Erebus Solar's outputs are a design aid for qualified professionals. Results depend on the phone's sensors, compass calibration and sky conditions; check them against your own observations and your design tool's simulation before relying on them. Privacy Policy: https://erebussolar.app/privacy Terms of Use: https://erebussolar.app/terms

Screenshots

PV Solar Tilt3 screens
Erebus Solar4 screens

Verdict

The call

The clearest difference is rating: PV Solar Tilt at 4.4 against Erebus Solar's 3.7. PV Solar Tilt also leads on review sentiment (33% vs 0%) and ratings volume (169 vs 3). Erebus Solar's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price 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. PV Solar Tilt sells 1 one-off in-app purchase. Erebus Solar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PV Solar Tilt holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: PV Solar Tilt has 169 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of PV Solar Tilt's written reviews are positive against 0% of Erebus Solar's.

UpkeepUpdate frequency

PV Solar Tilt ships an update every 4 months, Erebus Solar every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard9 real differences · 1 level
PV Solar Tilt versus Erebus Solar: the parameters behind the verdict, then further details
ParameterPV Solar TiltErebus Solar
PriceFreeFree
Rating4.4 (169 ratings) — better3.7 (3 ratings)
Positive reviews33.3% of reviews — better0.0% of reviews
Number of ratings169 — better3
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size14 MB19 MB
Age rating4+4+
DeveloperIgor IlijovskiTodd Evans

Customer experience

PV Solar Tilt

All ratings143 ratings
Positive84.6%
Neutral4.9%
Negative10.5%
Written reviews18 reviews
Positive33.3%
Neutral11.1%
Negative55.6%

Erebus Solar

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

PV Solar Tilt

One-time1
  • Lifetime license$14.99
None

Erebus Solar

No in-app purchases

Questions

Is PV Solar Tilt free?
PV Solar Tilt is free to download, with in-app purchases available.
Is Erebus Solar free?
Erebus Solar is free to download, with no in-app purchases.
Which has better reviews, PV Solar Tilt or Erebus Solar?
PV Solar Tilt is rated higher. PV Solar Tilt averages 4.4 out of 5 from 169 ratings, while Erebus Solar averages 3.7 from 3 ratings.
Do PV Solar Tilt or Erebus Solar have ads?
PV Solar Tilt shows ads; Erebus Solar does not.
Which is updated more often, PV Solar Tilt or Erebus Solar?
PV Solar Tilt ships an update every 4 months, and Erebus Solar every 2 weeks. Most recently, PV Solar Tilt was updated on November 3, 2026 and Erebus Solar on October 31, 2026.

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