SAJ Collector

Pull statistics from SAJ Solar Inverter and push them to PVOutput. This ruby gem is based on https://github.com/johnf/jfy_collector

Installation

First install ruby on your system through your favorite package manager. On Windows download and install ruby from Rubyinstaller.

Install saj_collector by running the following command from a linux shell or windows command prompt

gem install saj_collector

Usage

Create a config file for PVOutput in saj_collector.yaml. This should contain the IP address of your SAJ Solar Invertor (saj), your PVOutput system id (system_id) and PVOutput API key (api_key). These PVOutput system id and API key can be found on your PVOutput account page.

Some SAJ Solar Inverters provide the generation of each day with a granularity of 0.1kWh and some with a granularity of 0.01kWh. In case of the last you have to change the day_trend_multiplication_factor within your saj_collector.yaml to 10. An incorrect day_trend_multiplication_factor triggers a Bad Post exception when running the saj_output_collector script.

At the moment you are a PVOutput donator change donation_mode to true to enable the donation features of PVOutput.

:saj: a.b.c.d
:system_id: 123456
:api_key: fb6a2e3
:day_trend_multiplication_factor: 100
:donation_mode: false

Run the SAJ Collector from the command prompt or shell

saj_collector

This will run the current power generation frm the SAJ Collector and push the data to PVOutput.

The SAJ Output Collector will retrieve the generation of each day of the current month and push the data to PVOutput. Run the SAJ Output Collector from the command prompt or shell

saj_output_collector

Scheduling the collector

On Linux you can add saj_collector and saj_output_collector to your crontab to let it automatically push with a certain frequency.

At the moment you add any of these to your crontab you have to make sure that the saj_collector.yaml file can be found. For example when you put the saj_collector.yaml file in /usr/local/bin (and also the gem) and want to run it each 5 minutes between 6AM and 10PM you should add to your crontab

*/5 6-21 * * * cd /usr/local/bin && ruby /usr/local/bin/saj_collector

On Windows you can create a task using the Task Scheduler. Make sure that for the Action you specific the path of the saj_collector.yaml file as Start in.

Development

After checking out the repo, run bin/setup to install dependencies.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in lib/saj_collector/version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/jwillemsen/saj_collector. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.