# \[APP\] Solyx Energy WaterAccu - Store your unused solar power

**URL:** <https://community.homey.app/t/app-solyx-energy-wateraccu-store-your-unused-solar-power/144430>\
**Category:** Apps\
**Tags:** official, rf-433, homey\
**Created:** [October 23, 2025, 9:02am UTC](https://community.homey.app/t/app-solyx-energy-wateraccu-store-your-unused-solar-power/144430 "2025-10-23T09:02:36Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![FKey](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fkey/32/14793_2.png) [@FKey](https://community.homey.app/u/FKey)\
**Post date:** [October 27, 2025, 8:17pm UTC](https://community.homey.app/t/app-solyx-energy-wateraccu-store-your-unused-solar-power/144430/2 "2025-10-27T20:17:26Z")

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I love the idea, but the device is way too expensive (€650). After 01-2027 it will save you the tax (€0.12) and maybe prevent paying for negative prices.

I calculate a return after 3Mwh (€650/€0.20€/kWh) of energy.

The return energy logic can easily be build in homey.  
So in fact hou only need a device that can module power and is connected to homey.

Any [other](https://community.homey.app/t/boiler-slimmer-maken-via-dimmer/73850/102) cheap ideas?

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