Hypervolt Home 3 Pro and the Hypervolt Home 3.0 are now fully compatible with Charge Anytime

​@sanjoo    I’ll try and separate the points out for clarity.

My installation has 2 CTs at the grid supply point. 1 CT for the inverter and 1 CT for the Hypervolt. This I imagine is fairly standard and enables each system to see the household grid load.

We also installed the CT2 for the Hypervolt on the inverter AC side. This allows the Hypervolt to see the solar/battery supply in addition to the normal grid supply with CT1. Without this it won’t properly integrate with OVO CA. I understand your point about the Hypervolt manual, but we are merely talking about CT monitoring here. You can discuss with Hypervolt if you have any concerns, they are quite approachable. I should add, we did run without CT2 for some time, until I discovered you need this to resolve a number of issues. It is also required if you want to charge your EV under solar whilst its integrated with OVO CA and under their control. You are correct the Hypervolt does not contain CT2 in the box, but I contacted them and got that delivered (don't forget obtain the small green connector which is required in the CT2 port).

At this point everything works as it should in the solution…….but…….EV charging can discharge the home battery. As I mentioned this is a common problem, and the inverter is doing its job and meeting household load, which is what the Hypervolt is part of.

To resolve this problem, the typical alternatives such as wiring the Hypervolt via a Henley block or moving the inverter CT were not practical for me with a 2nd CU in a detached garage. It can be done but would have involved a lot of extra work and cost. Other alternatives such as battery thresholds, inverter programming schedules and manual switching were also undesirable for me. Too much hassle and meant I couldn’t use the system as I intended.

We installed an additional CT on the Hypervolt supply (in the garage CU). This is connected to the inverter and spliced via the main CT link cable. But its positioned in reverse on the Hypervolt supply. This has the effect of “cancelling” out the EV load in the inverters CT monitoring (technically if you are drawing say 10kw from the grid and 7kw is going to the Hypervolt, the inverter only see's the remaining 3kw). This stops the battery-battery discharge. The Hypervolt with just draw from the grid under OVO CA when required. Also when the household load and home battery are fully met from solar, the inverter pushes the excess for export. When that goes above 1.4kw, I get some additional solar EV charging (if EV plugged in) or if below 1.4kw is just goes into the OVO SEG export agreement. You need the Hypervolt CT2 to make this work.

The only slight downside is the inverter statistics don’t show the EV load and export stats are slightly skewed, but that’s minor for me and I can live with that. It has no impact on grid supply or OVO metering.

I don’t want to publish the installer details on here as I still have a couple of unrelated gripes with them. Once that’s dealt with I can let you know via PM.

Hope this helps.

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Thanks so much for the detailed response. Very helpful. I’ll convey this to my installers and see if it’s something they can do for me. Will keep you updated. Thanks again.

Hey ​@sanjoo,

It sounds like you’re getting the answers you’re looking for. Thanks for helping out ​@oho 😃

I’ve added a couple of badges to your profile to show you’re part of our EV and energy storage community.

​@oho ​@sanjoo I’ve been reading your past comments with interest. As someone who will be getting a Hypervolt installed next week with an EV on its way, and thinking about solar early next year, how are your set-ups working out?

Many thanks,

​@darren_p My setup has been great and works exactly as I needed it to (after the various changes I’ve mentioned in the previous posts)…….only downside is the OVO 14p grab. But like many on here I’ve worked out my costs will be less with several other suppliers, so I’ll be moving when my fixed rate ends in November. I’m expecting the Hypervolt to continue working fine with other suppliers.

Unfortunately I didn’t manage to sort out my issue yet as my solar installer didn’t reply when I supplied the info oho provided. As he mentioned, since the rate will be going up in November I am planning to switch early next year when my fixed rate ends. I think it will be better to be with octopus and use their night time rates to charge the ev and my solar battery and I don’t need to care where it’s coming from..

Thanks for your comments here ​@oho and ​@sanjoo, much appreciated.

​@oho sorry to hear that you haven’t had any luck yet with the installer, and sorry both that you’re thinking of switching due to the new Charge Anytime setup. It’s a shame that it doesn’t suit everyone.