wrolpi/docker
lrnselfreliance cc8afa5370
Add a Solar calculator (#778)
* Add a Solar calculator with offline NASA POWER data

Estimates a solar array's typical-year production from a location and the
panels; everything else has defaults under an optional "Fine-tune" section.

The model works from 12 monthly averages: Klein's average day per month, the
Erbs monthly diffuse fraction, Collares-Pereira & Rabl / Liu & Jordan hourly
split, HDKR transposition for fixed, single-axis and dual-axis arrays, then
PVWatts' ASHRAE incidence loss, SAPM cell temperature, DC power, system
losses and optional inverter.  "Best for the year" and "Best for winter" sweep
the tilt.

Sunlight, diffuse, albedo and temperature come from NASA POWER's 2001-2020
climatology on a 1 degree grid, packed into app/public/data (3.1 MB, ~1 MB
gzipped) by scripts/build_solar_climatology.py and fetched only when the
calculator opens.  Users can replace it with their own monthly values.

Every setting lives in the URL, with defaults left out, so the Share button
shares the whole configuration.

Against PVWatts v8 for a 1 kW fixed array: Phoenix +0.6%, Seattle +8.8%,
Anchorage +8.0% annually; these are recorded as tests.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Open the Solar calculator from the map, pins and current location

The map's right-click (or long-press) menu gains "Calculate Solar
Performance", and each saved pin a sun button; both open the calculator at
that location.  A button beside Latitude fills in the browser's current
location.  Locations are rounded to 4 decimals, and longitudes from a map
panned around the world are wrapped back to -180..180.

The map removed lat/lon/z from the URL when it closed, even after navigating
to another page, which stripped the calculator's location from its URL (and
from links shared with the Share button).  It now only cleans up while the
URL is still a map page.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Add off-grid sizing to the Solar calculator

A new "Off-grid sizing" tab sizes a battery system for the darkest month
from a list of devices (watts x hours per day):

- Battery bank for a number of days without sun, for LiFePO4 or lead-acid,
  at 12, 24 or 48 V.  Outdoor lead-acid is enlarged for the cold; outdoor
  lithium warns against charging below 0 C.
- Panels needed, from the worst month's DC production per kW at the chosen
  angle, with a button to apply the count.  A PWM controller's loss (battery
  voltage over the panel's Vmp) raises the count.
- Charge controller current, and the string voltage on the coldest morning
  against the controller's limit, since cold panels exceed their rated Voc.
  The coldest morning defaults to 25 C below the coldest monthly average.

All inputs live in the URL like the rest of the calculator.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Bump wrolpi-help for the Solar calculator help page

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Credit NASA POWER as it asks, and say how the data was changed

- The calculator gains a "Data attribution" link under the location with
  NASA POWER's requested acknowledgment, the data reference (Climatology API
  v2.10.0, downloaded 2026/10/04), the CC BY 4.0 license, and how WROLPi
  modified the data (rounded to one byte per value, temperature averaged
  into 1 degree cells, interpolated between cells), which CC BY 4.0 requires.
- The build script writes the same text to solar-climatology.LICENSE.txt
  beside the data, with the API version taken from NASA's responses and the
  date the tiles were downloaded.  A test keeps the page and file in step.
- Bumps wrolpi-help for the updated attribution in the help page.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Solar: fix PWM sizing, Voc sign, unit switching and loading on review

- PWM usable power now uses the string's voltage (Vmp x panels in series),
  delivers nothing when the charging voltage is at or above the string's Voc,
  and falls off between Vmp and Voc.  The "too little voltage" warning covers
  PWM as well as MPPT.  Previously two panels in series counted double, and a
  panel that could not charge a 48 V bank counted as fully usable.
- A Voc temperature coefficient entered without its minus sign is treated as
  negative, in the math, the URL and the input, so the cold-morning check
  cannot be made too generous.
- Switching Fahrenheit on or off converts the entered temperatures instead
  of reinterpreting them.
- While the sunlight data downloads, the off-grid tab shows a loader rather
  than asking for a location, and holds the cold-morning verdict until the
  site's temperatures are known or one has been entered.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Solar: move the data attribution to the bottom of the page

The full NASA POWER acknowledgment, license and changes now sit in a small
"Data attribution" section at the end of the calculator, always visible,
instead of behind a link under the location.  The source line under the
location points to it.  Bumps wrolpi-help to match.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Solar: drop the data source line under the location

The attribution at the bottom of the page is enough.  The line under the
location now only appears to report the data's state: loading, failed to
load, or replaced by the user's own values.  Bumps wrolpi-help for the
refreshed screenshot.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-04 18:36:45 -06:00
..
api Debian 13 (trixie) rebase: docker, debian-live-config, and pi-gen builds. 2026-07-13 15:43:08 -06:00
app Debian 13 (trixie) rebase: docker, debian-live-config, and pi-gen builds. 2026-07-13 15:43:08 -06:00
archive build(deps): bump sanic from 24.12.0 to 24.12.1 in /docker/archive (#714) 2026-10-03 10:07:17 -06:00
controller Debian 13 (trixie) rebase: docker, debian-live-config, and pi-gen builds. 2026-07-13 15:43:08 -06:00
help Add a Solar calculator (#778) 2026-10-04 18:36:45 -06:00
samba Debian 13 (trixie) rebase: docker, debian-live-config, and pi-gen builds. 2026-07-13 15:43:08 -06:00
web Speed Test calculator: ping, download, and upload against the API (#708) 2026-09-13 18:47:18 -06:00
zim docker: web container reaps zombies; zim and help healthchecks can pass (#744) 2026-10-02 15:49:34 -06:00
README.md Postgres -> SQLite hard cutover: the database moves into the media directory. 2026-07-12 14:09:37 -06:00

WROLPi Docker

Development and testing environment using Docker containers.

Quick Start

git clone https://github.com/lrnselfreliance/wrolpi.git
cd wrolpi
git submodule update --init
docker-compose build --parallel
docker volume create --name=openstreetmap-data
docker volume create --name=openstreetmap-rendered-tiles
docker-compose run --rm api db upgrade
docker-compose up

Browse to https://localhost:8443

Services

Service Port(s) Description
web 8443 (HTTPS), 8084-8086 Caddy reverse proxy
api 8081 Sanic API server
app (via web) React frontend
controller 8080 System management (FastAPI)
archive 8083 SingleFile/Readability
zim (via web:8085) Kiwix
help (via web:8086) MkDocs documentation
map (via web:8084) OpenStreetMap tile server

TLS Certificates

WROLPi uses a two-tier PKI for HTTPS. A root CA is generated once and persists in the media directory. A leaf certificate is regenerated on every container start to pick up hostname and IP changes.

How it works

  1. On first start, the web container generates a root CA at /opt/media/config/ssl/.
  2. A leaf cert signed by the root CA is created at /etc/ssl/caddy/ inside the container.
  3. Caddy serves HTTPS on ports 443, 8084, 8085, and 8086 using the leaf cert.
  4. The Controller serves on port 80 with a certificate trust banner when needed.

Trusting the certificate

  1. Browse to http://<host-ip> to see the Controller. If the HTTPS certificate is not yet trusted, a banner will appear with the download link and platform-specific trust instructions.
  2. Download and install the root CA on your device.
  3. All HTTPS ports will work without browser warnings.

The root CA only needs to be trusted once. Leaf certs can be regenerated (hostname change, container rebuild) without needing to re-trust.

Name Constraints

The root CA is restricted to local/private networks only via X.509 Name Constraints. Even if the CA key were compromised, it cannot sign certificates for public domains.

Permitted:

  • DNS: *.local, localhost
  • IPv4: 127.0.0.0/8, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16
  • IPv6: ::1, fc00::/7 (unique local), fe80::/10 (link-local)

EXTRA_SANS

The Docker container cannot discover the host's real LAN IP. Set EXTRA_SANS in a .env file so the leaf certificate includes your host's IP and hostname:

# .env
EXTRA_SANS=IP:10.0.0.5,DNS:myhost.local

Each entry must have a type prefix (IP: or DNS:). Multiple entries are comma-separated. After changing EXTRA_SANS, restart the web container:

docker compose up -d --build web

Regenerating the root CA

If you need to regenerate the root CA (e.g. after updating the certificate generation script), delete the old CA files and rebuild:

rm test/config/ssl/ca.crt test/config/ssl/ca.key
docker compose up -d --build web

All devices will need to re-download and re-trust the new CA from http://<host-ip>/ca.crt.

Volumes

The test/ directory is mounted to /opt/media inside containers, serving as the media directory for development. Certificate files, configs, and downloaded content are stored here.

Two external volumes are required for the map service:

docker volume create --name=openstreetmap-data
docker volume create --name=openstreetmap-rendered-tiles

Environment Variables

Variable Default Description
MEDIA_DIRECTORY /opt/media Media directory inside containers
EXTRA_SANS (empty) Additional SANs for the TLS leaf certificate
WEB_HOST 0.0.0.0 Host bind address for the web service
WEB_HTTPS_PORT 8443 HTTPS port
REACT_APP_API 0.0.0.0:8081 API bind address
UID 1000 User ID for api/app containers
GID 1000 Group ID for api/app containers

Upgrading

See UPGRADE.md for upgrade instructions.