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Indevolt Batteries UK Support & Info Thread

 
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Energy Storage
Last Post by Transparent 14 minutes ago
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Mars
 Mars
(@editor)
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Topic starter 27/04/2026 3:42 pm  

@jamespa, I'm getting my head around plug-in devices (batteries and PV) and I've identified two significant problem areas. Without saying what they are, can you please share your thoughts on what areas of the regs you think they're not compliant with?


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JamesPa
 JamesPa
(@jamespa)
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27/04/2026 3:57 pm  

Posted by: @editor
↑

@jamespa, I'm getting my head around plug-in devices (batteries and PV) and I've identified two significant problem areas. Without saying what they are, can you please share your thoughts on what areas of the regs you think they're not compliant with?

Yes.  Generators (PV or battery) must disconnect from the grid when the grid goes down.  This is to protect a linesman operating upstream, eg to repair the fault.  When they reconnect, they must wait a random amount of time after the grid reconnects before doing so.

So the only way that it is legal to operate in island mode (powered from the battery or PV) is if there is an interrupter between the powered circuits and the grid connection.  That means interposing something between the grid feed and your CU, which plug-in does not.

Thus (as I understand the regs) I cannot see how it can be lawful to operate it in island mode as a means to power your house electrics.  It can be lawful to power a single device from a socket on the back provided doing so disconnects the 'plug' of the plug in.

There may be an exception to the disconnection rule for low power devices (@transparent will know) of which I was not aware.

 


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Transparent
 Transparent
(@transparent)
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27/04/2026 4:43 pm  

Posted by: @editor
↑

During daylight hours in an outage, would the Indevolt’s island output be sufficient to bring the Solaredge PV inverter back online, effectively allowing it to keep recharging the battery from solar while the grid is down?

Aaagh!

You shouldn't have your inverters wired so as to allow that to occur.

The very fact that you're even considering it tells us the sort of 'miss-wires' which householders will attempt once plug-in solar becomes legally available.

 

The "always on" output from an inverter does indeed have a 50Hz signal which another inverter could synchronise to.
Thus it would be active when the grid is down.

But that "always on" port shouldn't have a facility which allows current to flow in, and thus recharge the battery.

The only port which allows a battery to be recharged from the grid is one which becomes inactive during a power-cut.

To emphasise this... an "always on" port is an output-only connection.

If the Indevolt isn't designed like this then it shouldn't be accepted onto the ENA database of G98-Approved products.

 

I am in direct contact with a senior DNO engineer who writes such Standards and is a representative at the ENA.

If you think the Indevolt system doesn't operate as I've described, then let's check the situation with that engineer and allow Indevolt receive that feedback.

The whole point of this G98-Approved list is to ensure that products do get accepted onto it, and that they are safe. There are no penalties for manufacturers who are trying to implement the regulations as intended.


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Transparent
 Transparent
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27/04/2026 4:48 pm  

In case @editor is worried about there being a surge of queries to this Forum once Amazon, Lidl, Ikea and others start shipping plug-in solar and plug-in storage...
it's unlikely that we will need to spend much time discussing 'miss-wires' with consumers wanting to run these devices during a power-cut.

They're not going to be in a condition to submit their questions here.  ⚰️


This post was modified 13 minutes ago by Transparent

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