HomeWizard has launched its Plug-In Battery, a home battery that can be installed without technical knowledge or an electrotechnical degree. Currently, the battery is only available in the Dutch market.
I am an engineer at HomeWizard and deeply involved in the development of this product. Additionally, I am the developer of the HomeWizard integration in Home Assistant. As of Home Assistant 2025.2, the battery is natively supported. Iām opening this topic to start a discussion about the product in combination with Home Assistant.
To kick things off
At the time of writing, you can gain insights into the batteryās energy consumption and production, including current power and state of charge. I think this is already pretty cool, but we can do more and I need your help! Iād like to gather ideas and opinions to fine-tune the API and integration.
ā If you had a home battery (even if itās not the HomeWizard Plug-In Battery), would you want to automate anything? If so, what would you automate?
So I think for me priority would be to let it work together with solar system, as example plug it in and when exporting energy, start charge an when importing start discharging. dynamic price control, time control and manual control (inclusief power).
Peak control would be the same nice to have feature. If electricity meter uses more than 5kw start discharging.
Hi Duco,
Iām looking for a plug-in battery that isnāt dependent on an app.
I almost opted for the Marstek Venus-E because it offers a āsuperā UPS option,
But the lack of local control scares me off.
Iāve had issues in the past when apps fail after a coupleofyears, so it would be nice if I could control as much as possible through HA.
The times that the battery charges & discharges, setting up peak shaving, an EMS to charge & discharge according to tariff, etc.
Can the HW work together with smart EV chargers, like the Zappi EV?
It would be useful if I could prioritise in HA whether my EV charges before the battery or vice versa.
Maybe a lot of this is already supported. I discounted Home Wizard previously, due to lack of backup/power station functionality, but future proof, local conrol is more important to me.
Sorry for the long reply.
Iām definitely going to look at your battery more seriously now.
Thank you for starting this topic. Iām really interested for buying this battery.
I think the idea of how this battery works is great.
I does not need to be a dynamic money machine imo. Toping off power is perfect for home use.
There is one of my problems. Hopefully you guys can make some sort of pause/idle option that we can activate.
Reason: I have a electricloading station for my car.
(Brand is Alfen. It Goes via my company)
This loading dock I can not controlle. And I do not want my energie from the battery too go into my car.
However, in home assistant I can see when my car is connected to this loading dock.
Soā¦ a can make an automation like; car connect - than pause HomeWizard battery.
So I can use the homewizard battery what it supposed to do. Topping of kWh. And keep counter on 0 during nighttime.
Please make an option we can controlle this battery bij pause-start-stop-etc.
(There must be already something build in. How can the battery only fill from solar energie? Otherwise, if you plug it in. It just fills up from grid. So there must be something that is controlling the unlocks the battery when there is more solar energie than house consumption right??)
Interesting, Iāll check it out. For me the challenge is to make full use of my car batteries so Iād like to be able to put some rules in to make sure it has certain charge available at a certain time. The idea of letting someoneās AI algorithm do it without access to my diary and weather forecast is concerning. Possibly allocating a proportion to AI and a proportion to API.
Idea for automation would be to postpone power from the battery when EV is charging. Why? you ask, my EV charging rates are paid through the company that I work for. So when the EV drain the battery and finished, I have to get my power from the grid, which is paid by ourself.
How do you look at allowing complete control of the battery through Home Assistant? This way Home Assistant could act as an (h)ems?
And how required is the HomeWizard P1 meter for the battery to function?
Hi there, i am new to this forum so not sure if what i do is correct. Appoligies up front
About the home wizard battery i would like to automate the
āManual load to fullā to accomplish the NulBalance.
I would like to do that triggered by time/ season
Because in the winter the battery is not fully loaded, and emptying it will shorten its lifetime.
But triggering by monitoring the state of the battery is Maybe even betterā¦?
It is suggested that during times where the battery (winter) is not fully loaded you better tho this regularly by hand. But automated in HA is even better i think.
I ordered the homewizard battery, scheduled delivery for end of april!
The basic functionality would already be very powerfull: being able to select the different modi. preferably more options than only ākeep zeroā or ādo nothingā:
Charge battery when dynamic pricing is low (at night without solar)
do not charge mode, in hours to sell back solar during expensive hours
I received my two homewizard batteries today and integrated them into home assistant. Everything went quite easily, but I canāt connect my batteries to the energy dashboard. Does anyone have experience with that.
Hi @DCSBL , many thanks for opening this topic and the open mindset at HomeWizard.
What I read from the website is that the battery only operates with the solar energy to charge and it does not support the dynamic tariff to charge at low price of the day and discharge at high price hours.
The argument from HomeWizard on the website is that the āprice difference is not significant enoughā, which isnāt really true to me. On a normal day the difference could be more than 10 cents diff, and on sunny/windy days or some other occasions it could be as high as 80 cents.
So what is holding me back of purchasing it is whether it would support the dynamic tariff contracts to make the best use of it. I understand that the control logic behind it could be complex. Do you have some insights or broader view about this?
Many thanks!
Option to have the State in HA, like idle/charging/discharging,
the Status in HA, like All is Ok, or error messages, I had a fault on the battery, and did not notice anything until i saw after much sun the battery was not charged, the app had e errors.
The option to turn the Battery off/on (for a period?) eg winter period
Time for fully charged/discharged.
@DCSBL that sounds great, any idea when it will be able to buy it outside of NL?
PS: as there is already a connection to Home Assistant it would be great if the P1 meter would not be obligatory but you can use other meters / values which are already in Home Assistant available.
Hey everyone, sorry for the delay in my response. Iāve read all the messages, but Iāve been really swamped with work. I just realised that I had already written a reply but forgot to hit send
We are designing the API so you can control the batteries. The list is not definitive, but the idea is to be able to control the P1 Meter (as this is the ācontrollerā for the batteries). We want to add some options related to which mode the batteries are operating in (e.g. ānormalā or āpauseā), and a custom target wattage so you can create some cool algorithm yourself.
āWhy not allowing direct control of the battery?ā This would be nice, and something we can do in the future. But that would make it possible to produce more than 800 watts when you have more than one Plug-In Battery, which is not allowed by law. The P1 Meter knows exactly how to steer more than one battery most efficiently, keeping the current state of charge, cycles, and consumption/production limits in mind. You have to create an algorithm for that, which gets complex really fast. So for now, it is control via the P1 Meter only.
i thought it was possible to charge with 800 watts per fase. so with a 3 fase connection you would be able to charge or discharge 2400 wattsā¦ 800 watts isnt even enough to power a single AC thats heating during the evening and this would mean i would still use allot of power from the net while im having 10 kwh in the batteries.
The next problem would be the charging part. I have 15 solarpanels which at peak deliver around 3500 watts of power. If i can only charge 800 watts this product is pretty useless. because most of it will still go to waste.
I really hope that these battereis can be devided over the 3 fases with a total of 2400 watts or else for allot of people this product has no use.
I think you can have your setup configured to charge and discharge with more than 800 Watts if you have more than one battery. However, it requires a more complex configuration and introduces risks if not done properly. The following it posted about this in the Dutch F.A.Q:
Kan de Plug-In Battery met meer dan 800 watt ontladen?
We adviseren een eigen groep (of zelfs meerdere eigen groepen per fase) als je met meer dan 800 watt wilt ontladen. Het is complex - en kan daardoor risicovol zijn - om de batterij over verschillende groepen of fases te verdelen zonder de juiste technische kennis. Dit verhoogt de kans op fouten en kan gevaarlijk zijn, doordat je met de elektriciteit in je woning bezig bent. Dit is waarom HomeWizard een expert adviseert als je met meer dan 800 watt wilt ontladen.
Which translates to (courtesy of ChatGPT):
Can the Plug-In Battery discharge more than 800 watts?
We recommend using a dedicated circuit (or even multiple dedicated circuits per phase) if you want to discharge more than 800 watts. Distributing the batteryās output across multiple circuits or phases without the proper technical knowledge is complexāand therefore potentially risky. This increases the chance of mistakes and can be dangerous, as it involves working with your homeās electrical system. This is why HomeWizard recommends consulting an expert if you plan to discharge more than 800 watts.
HomeWizard has launched its Plug-In Battery, a home battery that can be installed without technical knowledge or an electrotechnical degree. Currently, the battery is only available in the Dutch market.
Does the HomeWizard Plug-In Battery Really Work? Unboxing & First Test! 
- By Frenck.
Dutch)