question

Just glad to know that people are aware of it.

Thanks for your reply.

@IandDIndustries Yours is a different issue to do with smoothing, you can click the cog on the top right for the widget settings and turn on range values to accurately show minimum and max.

To add to what Al said.

You are at the mercy of computer limitations. There is usually too much data to be shown on a small graph like these. Each point on the graph represents a time period and all readings for that period are usually averaged to give the best representation of what happened. If you turn on min/max it may be unrepresentative.

For example: if a point on a graph represents 30 minutes, and there are readings every 5 minutes, each point on the graph covers 6 readings.

Scenario 1: steady sun, readings are 100 90 100 110 100 100, average is 100, peak 110, min 90

Scenario 2:dark cloud passes over, readings are 100 90 100 60 100 100,, average is 92, peak 100, min 60. On a low Res graph like this the points blend and instead of getting a single point at the average of 100, you get points at 60 and 100, which gives a vague fat line unless you really enlarge the graph.

Precise solar peaks are great for checking if your panels deliver their rated output at some point. But most of the time it's more useful to have average values. Especially on small graphs.