Dear Victron-Team, I warmly appreciate the implementation of solar forecast in VRM. It is a nice feature that allows a better planning of various aspects. Since I was using an own Solcast account before Victron’s implementation, I have the ability to compare. In the past I observed already that Vi…

This is something I have been raising for some time. In my case it under-estimates and then tries to correct itself throughout the day, see-sawing as it goes along. In this chart I compare forecast vs actual, recording the PV that is expected from any moment in time. It is typically off by 30% or m…

Hi @weichi , First of all thank you for the kind words and that the solar forecast is of use to you. Would you mind sharing your site ID with me? Then I can help explain any deviations from Solcast data for you.

@Barbara , Thanks for your reply. On this new platform I cannot discover a feature to send private messages. Is it portentially deactivated?

The forecast of vrm was quite accurate for me upto probably 2 weeks ago. (OR it just worked out for nice weather?) But especially the past 3-4 rainy days were quite off. For today, we had a solar production of 14 kWh, tomorrow will be the same I assume - yet the forecast is still predicting 35 kWh…

Yes, that’s also my experience: solar forecast works well at good weather, but bad at rainy/cloudy weather

@Barbara : Last 9 days I recorded VRM and native Solcast forecasts and PV results, where I like to share my findings. My post please shall be not considered as criticism, but as collaboration to support. Forecast versus PV result: [Screenshot 2024-09-29 122353] During 9 days native Solcast for…

Just an example from my installation from today, Victron forecast is completely wrong :frowning: [image] [image] [image]

Similar problems still here on my ESS with PV. I had been using Solcast for over 2 years and it provided ‘good enough’ forecasts for me to model the overnight target SoC so as not to feed back PV to the grid during the following day (I just look at tomorrows forecast for this model). I recently mi…

Please consider, I posted a follow-up about VRM solar forecast reliability in a separate thread, since this thread was temporarily hidden. For more information please see here: https://community.victronenergy.com/t/solar-forecast-reliability-in-vrm/23706

VRM PV forecast (improvement appreciated) - Comparison Victron's Solcast vs. native Solcast

Beta testing VRM beta

grua 16 September 2024 13:51 5

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VRM PV forecast (improvement appreciated) - Comparison Victron's Solcast vs. native Solcast

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