Understand Solar Energy readings

[roadtripper]

So if this is the day you moved from your storage location into a place with better visibility of the sky you can see how much of a difference that's made to your solar yield.

An important figure to look at here is "P max" as this is the highest overall power the panel achieved. I'm assuming from the figures you have a nominal 100w panel, so on the "2 days ago" you got very close to ideal with a peak power of 90w, but the days before you got very low values in the 10-15w region.



Shading really harms solar panels, more than you'd expect. I did some experiments myself here:

BLUETTI EB3A initial review

So for non T6 reasons I ended up buying a Bluetti EB3A so I thought I'd let folks here know my initial review thoughts. There are lots of threads about the bigger systems but less about the more modest ones. Basic impressions So this is the Bluetti EB3A alongside my small Beaudens I use as a...

www.t6forum.com

 

[Lotuscamper]

Wow
Don’t know the drain could be that quick? I had the WiFi router on that’s it ! Have got into habit now of switching it off as my phone trying to connect when in house annoyance !

 

[TallPaul_S]

Wow
Don’t know the drain could be that quick? I had the WiFi router on that’s it ! Have got into habit now of switching it off as my phone trying to connect when in house annoyance !

Yeah that'll do it. As a said, all it takes is a small device running, that will have been using an amp or 2 max but as you've not had great solar when the van has been parked up it's not been able to replenish what's been taken out.

 

[ginkster]

The battery on the history is showing a min of about 12.8v though so not a flat battery. The low solar input appears to be because the battery is full and it’s gone into float. It’s also been getting a health 14.4v charge.

 

[roadtripper]

I'd still expect a higher P Max though as each day shows some time spent in bulk charge.

I wonder if by "last Sunday" you mean 3 days ago or 10 days ago @Lotuscamper ?

Because your history does seem to show low solar yield but reasonable battery levels recently, but if you had a load left on further back in time (that's not in your screenshot) my suspicion is where your van is parked it's not getting enough solar to cope with that load.

 

[Lotuscamper]

I wonder if by "last Sunday" you mean 3 days ago or 10 days ago

For reference it was 3 days ago was last Sunday in terms of screenshot
Thanks