Downranges the percentages from Symo API (0-100) to 0-1 as Prometheus convention expects.
Also, in case the photovoltaic power is zero, the device API returns null, which doesn't make sense.
Checklist
[x] Keep pull requests small so they can be easily reviewed.
[x] Categorize the PR by setting a good title and adding one of the labels:
fix, enhancement, documentation, change, breaking, dependency
as they show up in the changelog
Summary
Downranges the percentages from Symo API (0-100) to 0-1 as Prometheus convention expects. Also, in case the photovoltaic power is zero, the device API returns null, which doesn't make sense.
Checklist
fix,enhancement,documentation,change,breaking,dependencyas they show up in the changelog