This article is generally about the Horrendous Oukitel P2001E and it’s DIRE app WONDERFREE.But read the updates at the end… a Home Assistant solution, Grid Tie Invertors and more… I’m using the Oukitel P2001E Lithium 2KW battery system and the app they had a third party create for them.No API, the app doesn’t work reliably – and there is NO support from either company.
Here’s my original article covering generators and other stuff as well as the Oukitel.I started all of this at the beginning of 2026 and when I LAST updated this blog in July there was still no other option than to use the horrendous “Wonderfree” app.I’d checked all over and no alternatives for the device and so chatGPT and I spenjd many hours working on reverse engineering the Bluetooth codes – with the alternative being to continue to suffer the unreliable app.
No-one from Oukitel Power could then or can now can be bothered to help.Should we have come up with an alternative to the app I’d planned to cover it in here, meanwhile my advice was and is -if you can afford it, go for a Bluetti – I borrowed one for the months that we had no mains power and it is more expensive but the overall experience is/was WAY better.Also, the Oukitel should support a pair of 400w solar panels for up to 800w out (40v – so well within its 60v voltage limits when running a pair in parallel) but I could NEVER get more than 350w or so out of the pair of 400w panels.
The Bluetti I borrowed would give up to 600w out of the same two paralleled panels – and since then I bought a grid-tie invertor (from Amazon – well under 150 euros on offer) to get the best out of the panels, 650w or more no problem (their theoretical max is 800w but they are not directly facing the sun) – so why couldn’t the Oukitel “engineers” achieve that I wonder.The grid-tie invertor is working and ovre the entire summer has been pumping out 650w or more from our two 400w panels – more than enough for general daytime electricity consumption (excluding washing machine, drier and 2 hot water tanks which ran on our generator until we got mains electricity and now run overnight on Spanish cheap-rate electricity.Update July 14, 2026: As far as the Wonderfree app is concerned, after much searching about – Wonderfree is not the clever bit, Wonderfree is “just” a React Native front-end sitting on top of the Acceleronix SDK.
If that helps anyone – so be it… but ChatGPT and I spent a LOT of time on this and in the end, failed.See ChatGPT output in blue… Look what we’ve established: Identified the cloud host: iot-ws.acceleronix.io Identified the AI host: ai-chat.acceleronix.io Found the WebSocket connection code.Found how one class authenticates (Authorization=usr-...).
Confirmed the platform revolves around productKey and deviceKey.Confirmed this is a generic Acceleronix/Quectel platform.Update July 16, 2026: After a promising start, ChatGPT gave up decoding the Wonderfree app / Outitel communications..
2 days of solid graft, testing code and it just flat out gave up (NEVER believe AI promises).And that started me thinking – now I have mains power and the grid-tie invertor for my solar panels, do I really need to use the battery regularly or put it in a corner and schedule monthly checks in HA to see if it drops below 80% charge – reserving it for big power outages (my UPS will keep WiFi etc running through the odd 1 minute or less drop-out).Update August 7, 2026 – Grid Tie Invertors I said I’d write more once I got to grips with my new 800w Grid-Tie Invertor – well, it’s like this… the not-very-big but HEAVY unit plugs into my solar panels – two of them – 400w each – on separate cables – and then there’s a lead with a PLUG to plug into the mains – NO that’s not to take power OUT of the mains – it is to feed power back INTO the mains..
now if that sounds UTTERLY, UTTERLY counter-intuitive and even dangerous – it seemed that way to me until recently.But it WORKS and depending where you live, you might even be able to feed any excess back to your mains provider – but I’ll not get into that and I’m not doing that personally.Incidentally all cables came with the invertor.
There’s a YouTuber in the UK who is streets ahead of me on legislation and probably more – and I stumbled on his video by accident this morning… it seems that with major caviats the UK goverment is in the process of passing legislation to make the use of these devices legal in the UK (not that this has stopped anyone as I understand it).Anyway here’s the link to the video.Worth watching if you’re in the UK (I’m not).
Quick takeaways – when the UK legislation is through it’ll be legal to buy a COMPLETE KIT and have it fitted by a qualified electrician (I’m not condoning it -just telling you what to expect).So it SEEMS that if you already have solar panels in the UK and fancy using one of these devices – it isn’t entirely clear if the law will be on your side? Good luck.Update October 4, 2026 – The Oukitel Revisited – Home Assistant to the Rescue Months ago as you’ll see above, armed with mains power, the nightmare Oukitel became a distant memory for me – until I just happened to be checking my “Comments to be approved” fo the blog.
If you’ve followed this because you have an Oukitel – meet your new best friend VICTOR..Oukitel and Home Assistant – No More Rubbishy App – Wheeee I was travelling this weekend and noted a pending comment from a gentleman who has reversed not the Bluetooth but the local connection between the Oukitel P2001 and the LAN and created a Home Assistant integration tat for me anyway works straight out of the box!! Thanks to having Tailscale VPN on my phone and router I can now access and control the Oukitel from my phone – NO PROBLEM – ANYWHERE.I’ll leave readers to comment to Victor – he’s put the link to the Github repository for his integration – and note the 1-CLICK installation into HA.
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