# MPPT scanning on Huawei SUN2000 (Modbus 42054 & 42055)

**URL:** https://community.homey.app/t/mppt-scanning-on-huawei-sun2000-modbus-42054-42055/157405
**Category:** Questions & Help
**Tags:** homey-pro
**Created:** [July 20, 2026, 10:30pm UTC](https://community.homey.app/t/mppt-scanning-on-huawei-sun2000-modbus-42054-42055/157405 "2026-07-20T22:30:08Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Andi](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/andi/32/160466_2.png) [@Andi](https://community.homey.app/u/Andi)
#### Post date: [July 20, 2026, 10:30pm UTC](https://community.homey.app/t/mppt-scanning-on-huawei-sun2000-modbus-42054-42055/157405/1 "2026-07-20T22:30:08Z")

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Hi everyone,

I’m currently exploring the **MPPT scanning settings** on the **Huawei SUN2000 inverter** , and I’m curious whether anyone here has **real‑world experience** with these parameters.

In the **new test version of my Homey app** ([Huawei FusionSolar Manager | Homey](https://homey.app/a/com.huawei.fusionsolar/test/)), I’ve integrated the relevant Modbus registers and can now **enable and configure MPPT scanning directly from the app**. On my own system, the feature was **disabled by default** , so I’ve now **activated it for testing** — but before I draw any conclusions, I’d really like to hear from others who have tried this.

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/9/9911c1351c7117a234e072278865d5cb51e5567f.png)

The two Modbus registers involved are:

- **42054 – MPPT Multi‑peak Scanning (R/W, E1)**  
Enables or disables the MPPT multi‑peak / shade‑scanning feature.

- **42055 – MPPT Scanning Interval (R/W, U1)**  
Sets the interval (in minutes) between each MPPT sweep.

I’m especially interested in whether this feature is **enabled on your systems** by default or if it was also **turned off** like on mine.

And of course, I’d love to hear your practical insights:

- Does enabling MPPT multi‑peak scanning improve **yield** or **tracking stability**?
- Does the scanning interval make a noticeable difference?
- Any downsides, such as unnecessary sweeps or reduced stability?
- What interval values are you using — and **why**?

There’s very little hands‑on feedback available online, so any experiences or long‑term observations would be super helpful.

Thanks  
Andi