Hanchu ESS Inverter Support — Battery Faults, SolarMan Setup & Tariff Configuration
Hanchu battery not charging, SolarMan offline, BMS communication errors, or grid disconnection faults — we diagnose Hanchu hybrid systems at the engineering level. Remote-first using SolarMan data and charge schedule logs. Independent from Hanchu and your installer.
Most Hanchu configuration issues are fixed remotely in a single session. Tell us what you're seeing and we'll work it out.
Book Remote Diagnostic — from £75 → See the Solar Health PlanSafety: If your Hanchu battery is showing error lights or unusual behaviour, isolate at the DC switch before investigating.
Common Hanchu problems we diagnose
Every fault below has a proven diagnostic path. Book a diagnostic if you're unsure where to start.
Hanchu hybrid inverter connected but battery stays flat overnight despite an Octopus or time-of-use tariff. Most often a TOU schedule configuration error in SolarMan — charge window not enabled, grid charge toggle off, or SoC target already met.
See diagnostic guide →Hanchu inverters are configured via SolarMan's TOU schedule. Common issues include charge windows offset by BST/GMT, the grid charge enable setting being toggled off, or peak shaving settings overriding the schedule. We configure the full TOU schedule remotely.
See diagnostic guide →Hanchu LV batteries communicate with the inverter over CAN bus. A BMS comm fault means the inverter can't read the battery state, which causes it to stop charging or discharging. Can be caused by a loose CAN cable, incorrect BMS pairing, or a battery firmware mismatch.
See diagnostic guide →Battery fully charged but not powering the house during peak times. Often caused by a discharge schedule not configured in SolarMan, or the minimum SoC threshold being set too high. EPS/backup mode must also be correctly configured if backup power is needed.
See diagnostic guide →Hanchu hybrid powered but not generating. Check SolarMan for DC input voltage — if zero, check DC isolators and PV string connections. A string fault or MPPT tracking error can stop generation while battery and grid functions continue normally.
See diagnostic guide →Hanchu inverters comply with G98/G99 and will disconnect if grid voltage or frequency goes outside permitted limits. The inverter reconnects automatically once conditions normalise. In areas with many solar installations, repeated trips may need export limiting to prevent instability.
See diagnostic guide →Hanchu hybrid inverters support EPS (Emergency Power Supply) mode but it requires a dedicated EPS output wiring circuit and must be enabled in settings. If the house lost power during a grid outage, EPS may not have been commissioned correctly during installation.
See diagnostic guide →Hanchu uses the SolarMan platform (SolarmanPro) for monitoring. If the app shows offline, the inverter's WiFi datalogger has lost connection — common after a router change or firmware update. The inverter and battery continue operating normally; only monitoring data is interrupted.
See diagnostic guide →Hanchu dataloggers require 2.4GHz WiFi. Many reconnection issues after router upgrades are caused by the router defaulting to 5GHz or combined band steering. We reconfigure the datalogger remotely and restore SolarMan monitoring.
See diagnostic guide →What we do for Hanchu owners
Remote Hanchu Diagnostic
We review SolarMan data, TOU schedules, BMS logs, and error history to identify the exact fault without a site visit.
Hanchu Tariff Configuration
We configure your Hanchu charge and discharge schedule from scratch for Octopus Agile, Intelligent, Go, or Flux. Most configuration faults resolved in a single remote session via SolarMan.
On-Site Hanchu Repair
EPS circuit verification, CAN bus cable checks, BMS pairing, DC fault location, and component replacement for Hanchu inverters and Blade LFP batteries.
About Hanchu ESS — what you need to know
Hanchu ESS is a Chinese energy storage manufacturer producing hybrid inverters and LiFePO4 (LFP) battery systems for the residential and light commercial market. Their UK range includes single-phase hybrid inverters — the HC-3.68KW-HY, HC-5KW-HY, and HC-6KW-HY — paired with Blade LFP battery modules in capacities from 3.2kWh to 9.4kWh per unit. The inverters carry an IP66 rating, a 12-year inverter warranty, and a 10-year battery warranty. Blade LFP chemistry offers a high 95% depth of discharge, making nearly all the stated capacity usable in daily cycling.
Monitoring and schedule configuration is handled through the SolarMan platform (SolarmanPro for installers, the SolarMan app for homeowners). The most common support queries we handle for Hanchu systems are: Hanchu battery not charging overnight, Hanchu SolarMan offline, Hanchu BMS communication fault, Hanchu grid disconnection, and Hanchu Octopus tariff setup. Hanchu systems are distributed in the UK through companies including Powerland and Solar Battery Group. STS provides independent support — not affiliated with Hanchu ESS.
Hanchu questions answered
Hanchu inverters are configured via SolarMan's Time of Use (TOU) schedule. The most common causes of overnight charging failure are: the charge window not being enabled, the grid charge toggle being off, or the SoC minimum being set too high so the battery never triggers a charge cycle. BST/GMT clock offsets also commonly cause windows to fire at the wrong time. We configure the full schedule remotely.
SolarMan requires a stable WiFi connection from the inverter's datalogger. After a router change, password update, or firmware push, the datalogger loses connectivity. The inverter and battery continue operating normally — only monitoring data is lost. We reconfigure the datalogger remotely to restore SolarMan.
Hanchu batteries communicate with the inverter via CAN bus. A BMS comm fault means the inverter has lost communication with the battery management system. Causes include a loose or damaged CAN cable, incorrect DIP switch address settings on the battery, or a mismatch between inverter and battery firmware versions. This is typically diagnosed and resolved remotely via SolarMan logs.
Yes. We configure the TOU charge schedule in SolarMan to correctly capture cheap rate windows for Octopus Agile, Go, Intelligent, Flux, or any other time-of-use tariff. This often resolves overnight charging complaints that aren't hardware faults — just incorrect or incomplete schedule configuration.
STS supports all major inverter and battery brands — not just Hanchu. If you have a mixed-brand system (e.g. Hanchu inverter with Lux or Dyness battery), visit the brand hub.
Browse all supported brands →Ready to fix your Hanchu system?
Tell us what's happening. We'll review your SolarMan data and come back with a clear diagnosis — usually same day.