My first post here!
@admin Paul - I've already done this.
A few people here are aware. I started at the end of last year collecting data from the Ecotricity site. I scrape the data from their HTML every night at 20:00. I store this (in its entirety) in a database and present it back in various pages and charts. I also record the date of publication of the map to record how 'stale' the data may be.
From this I can trend up / downtime, reliability etc. by location and unit type. Of course the data is only ass good as the data they choose to publish via the map. Sometimes it is updated several times a day - pretty much as issues are tweeted - other times its a day or two. Sometimes they update at the weekend.
For chargemaster / polar I've been collecting data for a few weeks. For them it's a bit different. They have various APIs hidden away in their site. They are pretty good, but with most things CM poorly implemented. I 'harvest' data from them every hour and record in a database also.
Currently With the API Im unsing for CM I can see the unit id and serial, location and if it in use, also if it's fully in use. It also shows some info about coms state which I need to do some more tests on.
There is another (better) api where I can get a lot more unit info about location, the plug types and states but it's very unreliable. I've stripped the data from it for reference but it doesn't update correctly So I'm not using it. I do wonder if it will come back online after the 1st April..!
I was also thinking it would be interesting to post it into something like OCM..?