Solar & battery monitoring

I have used EmonPI for a number of users and the Solar app has been great for monitoring generation v consumption. Last week I had a PowerVault battery fitted and need to make some adjustments to the configuration and from my understanding create my own dashboard as the Solar app will no longer function correctly?

In total, I will need three CT, one for the import/export at the meter, one for the generation from the solar and a third (new) CT for the battery to measure charge/discharge?

Three CT will mean that alongside the emonPI I will need an EmonTX for the third CT?

Are my assumptions correct?


I think the battery charge-discharge will be DC? The solar also?
The CT’s only work with AC.

Blockquote I think the battery charge-discharge will be DC? The solar also?
The CT’s only work with AC .

In my instance, each solar panel is fitted with a micro-inverter and the feed from the roof to the CU is AC. The PowerVault battery takes an AC feed for charging and returns AC for power. It internally has its own inverter from AC to DC.

That would be a rectifier, vice an inverter, would it not?

Yes you will need an emonTX. I’m using one to monitor solar /grid and also a pv3 I’m still trying to figure out how to integrate it with a dashboard to give me an easy to view SOC

1 Like

It’s listed as a hybrid solar inverter

Might even be a buck/boost converter?

For AC → DC, it’s a rectifier; for DC → AC, it’s an inverter.
I don’t think there’s a generally accepted name for the combination when both functions are performed by the same unit.

That means it can simultaneously manage inputs from both solar panels and a battery bank, charging batteries with either solar panels or energy from the grid (depending on which is more economical or preferred). Their capabilities may go beyond this – some also handle inputs from wind turbines, generators as well as other power sources.

It’s all a learning curve for me, I do know at the moment it can only be fed via ac as having an ac and dc solar source causes issues(software limitations I believe) I had to ask them and then buy an additional solar inverter for my additional solar I that was added

Probably not.
A B/B converter is a DC to DC device as opposed to the AC to DC device the OP is referring to.

After rectification it’ll have some kind of controller, is the point I’m making.
Could be a PWM charge controller, or buck/boost…

But the point the OP made was with respect to AC getting converted to DC.

It is a rectifier that converts AC to DC yes. I didn’t mean to subtract from that argument, only to add that it’s not just a rectifier at work.

My thought is you added to the argument - a lot of needless confusion.

Fair comment. Sorry.
I wasn’t clear at all!

Thank you to everyone who took the time to answer my query and increase my knowledge


1 Like