The Livoltek iPower HES-3680 All-in-One Energy Storage System is a sleek, wall-mounted hybrid solar storage system that pairs a 3.68 kW single-phase hybrid inverter with one to five LiFePO4 (LFP) battery modules in a single unified enclosure. Starting at 5.12 kWh and scalable to 25.6 kWh by adding BLF51-5 modules, this compact all-in-one is engineered to suit smaller UK homes and low-export solar installations — delivering maximum self-consumption, emergency backup power and smart tariff management without requiring a separate inverter and battery cabinet.
With a fanless, natural-cooling design and a depth of just 165 mm, the iPower HES-3680 fits discreetly in a hallway, utility room or garage. The unit ships as a complete kit: inverter, bracket assembly, battery module(s), CT sensor, Wi-Fi/Bluetooth dongle and all connectors — everything needed to commission a working solar storage system in a single visit.
25.6 kWh
Max. Storage (×5)
Installer Note: This system must be installed by a suitably qualified electrician. All AC and DC connections must be made with the DC switch in the OFF position. The EPS (backup) output circuit must never be connected back to the grid. All cable sizes must be confirmed against local BS 7671 wiring regulations by the responsible installer.
Battery Compatibility: This all-in-one system is designed exclusively for use with Livoltek BLF51-5 LiFePO4 battery modules. Third-party batteries are not compatible and must not be connected. A maximum of five modules (25.6 kWh) may be stacked per inverter unit. Parallel inverter operation is not supported in this bundle configuration.
Why 3.68 kW? The 3.68 kW AC output is a common UK grid-connection limit for single-phase export without additional DNO application. Choosing the HES-3680 simplifies the grid-connection process for many standard residential installations while still accepting up to 5,520 Wp of solar input — ideal for a typical 14–18 panel rooftop array.
WHAT MAKES THE iPower HES-3680 STAND OUT
5,520 Wp PV Input Capacity
The HES-3680 accepts up to 5,520 Wp of PV array input — approximately 150% of the 3.68 kW AC output — via dual independent MPPTs each rated to 14 A. This allows strings from east and west roof faces to be tracked simultaneously, squeezing extra generation from the extended morning and afternoon periods typical of UK solar conditions.
Fanless Natural Cooling
There are no fans, no moving parts and no fan-noise in the iPower HES-3680. Passive thermal management through the enclosure surface keeps internal temperatures in check and eliminates the main mechanical failure mode found in conventional inverters. The unit operates continuously from –10°C to +55°C without derating.
Modular Battery Expansion
The bracket system is designed for growth. Start with one 5.12 kWh BLF51-5 module and add up to four more without rewiring — simply mount, connect the power and BMS CAN cables, and the system automatically recognises and integrates the new capacity. Maximum total storage with five modules is 25.6 kWh.
Intelligent Cell Balancing
Active cell balancing within the integrated BMS keeps all cells across all modules at matched voltage levels, protecting against capacity imbalance and extending cycle life beyond 6,000 cycles. Real-time temperature monitoring within each module triggers automatic protective actions if thermal limits are approached.
Sub-10 ms EPS Backup
On detecting a grid failure, the HES-3680 switches to Emergency Power Supply (EPS) mode in under 10 milliseconds — seamless enough for most household equipment. The EPS output delivers 3.68 kVA at 220 Vac / 50 Hz as a pure sine wave, with peak headroom up to 1.5× rated power for 100 ms to handle motor start-up surges.
Time-of-Use & Export Control
Programme charge and discharge windows to match tariff periods — ideal for Octopus Agile, Economy 7, Go or any multi-rate tariff. The CT sensor (included) enables precise zero-export or limited-export operation for installations where the DNO imposes a cap. All scheduling is managed through the My Livoltek app or web portal.
Slim, Unified Wall-Mount
Inverter and battery modules share a single bracket assembly supplied in the box, presenting as one coherent unit on the wall. The slim 165 mm depth and total installed width of 415 mm keeps the footprint tight. Minimum clearances of 300 mm on all sides are required for ventilation and servicing access.
Free Cloud Monitoring
The included Wi-Fi/Bluetooth dual-function dongle connects the system to the My Livoltek cloud portal (iOS & Android app, no subscription). Homeowners see generation, consumption and battery state in real time; installers can access remote diagnostics, firmware upgrades and event logs — all from the same platform at evs.livoltek-portal.com.
TECHNICAL SPECIFICATIONS — iPower HES-3680
| Parameter |
Value |
| Model |
Livoltek iPower HES-3680 (Hyper-3680) |
| Nominal AC Output Power |
3,680 W (single phase) |
| Nominal AC Output Current |
16.0 A |
| Max. PV Input Power |
5,520 Wp |
| Max. PV Input Voltage |
600 V |
| MPPT Voltage Range |
125 V – 550 V |
| Number of MPPTs / Strings per MPPT |
2 / 1 |
| Max. PV Current (per MPPT) |
14 A |
| Max. Short-Circuit Current (per MPPT) |
17.5 A |
| AC Input Voltage Range |
186 Vac – 290 Vac |
| AC Frequency |
50 Hz (or 60 Hz) |
| THDi @ Rated Power |
< 3% |
| Max. Efficiency |
97.8% |
| Euro Efficiency |
97.4% |
| EPS Output Voltage / Frequency |
220 Vac / 50 Hz |
| EPS Continuous Output Power |
3.68 kVA @ 25°C |
| EPS Peak Power |
1.5× Pnom for 100 ms; 1.1× Pnom for 60 s |
| Grid / Off-Grid Switchover Time |
< 10 ms |
| Output Waveform |
Pure Sine Wave |
| Power Factor |
~1 (adjustable 0.8 leading – 0.8 lagging) |
| Max. Inverter Charge Current |
80 A |
| Max. Inverter Discharge Current |
80 A |
| Battery BMS Communication |
CAN bus |
| Battery Type |
LiFePO4 (LFP) — BLF51-5 |
| Battery Module Nominal Energy |
5.12 kWh (100 Ah @ 51.2 V) |
| Battery Voltage Range |
40 V – 58.4 V (nominal 51.2 V) |
| Max. Battery Charge Current |
50 A per module |
| Max. Battery Discharge Current |
100 A per module |
| Max. Depth of Discharge |
90% |
| Scalability |
Up to 5 modules (25.6 kWh total) |
| Battery & Inverter IP Rating |
IP65 |
| Operating Temperature |
–10°C to +55°C |
| Dimensions (W × H × D) — per unit |
415 × 1,380 × 165 mm |
| Weight (inverter + 1 battery module) |
86 kg |
| Cooling Method |
Natural convection (fanless) |
| Galvanic Isolation (Battery) |
Yes |
| Communication Interfaces |
Wi-Fi (dongle included), RS485, CAN, CT input |
| Monitoring App |
My Livoltek (iOS & Android) — free cloud portal |
| Warranty |
10 years |
WHAT'S IN THE BOX
Every bundle ships as a complete, ready-to-install kit. Box contents (per the Livoltek Quick Installation Guide) include:
Inverter unit · Inverter bracket · Battery module(s) (quantity matches bundle selected) · Battery bracket · Middle cover & bottom bracket · Side frames ×2 · PV connectors (×2 or ×4) · Wi-Fi/Bluetooth dongle · CT (Current Transformer) · Grid connector · EPS connector · Multi-COM connector · Battery power connectors ×2 · BMS connector · DRM connector · PE terminal · Expansion bolts ×10 · Screws ×16 · Quick installation guide & documentation.
BUNDLE CAPACITY GUIDE — WHICH OPTION IS RIGHT FOR YOU?
| Bundle |
Usable Storage (90% DoD) |
Best For |
| 3.68 kW + 5.12 kWh |
~4.6 kWh |
Flats, smaller homes, entry-level solar storage |
| 3.68 kW + 10.24 kWh |
~9.2 kWh |
2–3 bed homes, overnight tariff shifting, Agile |
| 3.68 kW + 15.36 kWh |
~13.8 kWh |
3–4 bed homes, extended evening coverage |
| 3.68 kW + 20.48 kWh |
~18.4 kWh |
Higher-consumption homes, multi-tariff optimisation |
| 3.68 kW + 25.6 kWh |
~23 kWh |
Maximum self-sufficiency, near off-grid operation |
FREQUENTLY ASKED QUESTIONS
Why choose the 3.68 kW version over the 5 kW?
The 3.68 kW AC output aligns with a widely used single-phase grid-connection threshold in the UK that typically does not require a formal DNO application for low-export or zero-export installations. If your property has a smaller solar array (up to around 14–16 panels) or if your DNO has set an export cap at this level, the HES-3680 is the natural fit. The 5 kW variant is preferable for larger arrays or where higher discharge power is needed to meet household demand spikes.
Can I add more battery modules after installation?
Yes. Up to five BLF51-5 LFP battery modules can be installed on the same bracket system. Additional modules can be retrofitted at any time without rewiring the inverter. Mount the new module, connect the battery power cables and BMS CAN link, then update the battery capacity setting in the My Livoltek app. The BMS immediately integrates the new module into the charge management cycle.
Does the system provide backup power during a grid outage?
Yes. The EPS (Emergency Power Supply) function activates in under 10 milliseconds when the grid fails, seamlessly transferring backup loads to battery power at 3.68 kVA continuous. The duration of backup depends on battery capacity and the load being powered — for example, a 10.24 kWh two-module bundle with a 400 W average load would provide around 23 hours of backup. The EPS output must be on a dedicated circuit separated from the grid supply, configured by your installer.
How do I control export limits and tariff scheduling?
All control is via the My Livoltek app (iOS & Android) or the web portal at evs.livoltek-portal.com for UK and European users. The included CT sensor measures your real-time import/export at the meter, enabling precise zero-export or custom export cap settings. You can also define daily charge and discharge time windows to maximise savings on tariffs such as Octopus Agile, Economy 7 or Intelligent Go — all at no subscription cost.
What are the installation clearance and cable requirements?
The Quick Installation Guide specifies a minimum clearance of 300 mm on all four sides of the unit for ventilation and maintenance access. Required cable cross-sections are: AC cables 4–6 mm²; PV cables 4–6 mm²; battery power cables 25 mm²; PE earth cable 4–6 mm². Wall fixings use M12 or M8 expansion bolts to a minimum depth of 70 mm. All final cable sizing must be verified by the responsible installer against BS 7671 and local conditions.
What warranty does the Livoltek iPower HES-3680 carry?
The system is covered by a 10-year warranty on both the inverter and battery modules. LiFePO4 chemistry is inherently thermally stable and rated for over 6,000 charge cycles at 90% DoD — equivalent to more than 16 years of daily cycling. The BMS's active cell balancing and temperature monitoring protect cell health throughout the warranty period. Warranty claims require that installation was carried out by a qualified electrician following the Livoltek installation guide.
