I'm pleased to announce that Big Ladder Software is launching a new web-based documentation resource for EnergyPlus today.
Because EnergyPlus is available under an open-source license we are able to use the "source" documents to generate and publish web-based versions of the standard documentation, namely:
Features include a table of contents, an object index, linking between objects, and Google Custom Search (coming soon).
This is a beta release so we know there are still some issues to fix. For example, a number of images and equations did not convert very well. We will be working to fix these and other problems in the coming months.
Currently the web-based documentation covers only the Input Output Reference and Engineering Reference for EnergyPlus 8.0. If there is interest, we may add more documents for 8.0, and also 7.2, in the future.