Sigenergy SigenStor vs Huawei LUNA2000-S1
Sigenergy SigenStor stores 5.2–7.8 kWh per unit, expanding to 46.8 kWh. Huawei LUNA2000-S1 stores 6.9 kWh per unit, expanding to 20.7 kWh. Across the setups we list, continuous power is 4–6 kW for the SigenStor and 3.5–5 kW for the LUNA2000-S1. Warranty: 10 years vs 5–15 years.
Figures from manufacturer documents, last checked 26 Sept 2026. We don't rank products or take payment for results.
How they're built
Sigenergy SigenStor
Modular: Energy Controller (hybrid inverter, solar on DC side) plus stacked battery modules.
Backup: Sigen Energy Gateway.
Huawei LUNA2000-S1
DC-coupled high-voltage battery: one control unit plus 1–3 battery modules, connected to a Huawei SUN2000 hybrid inverter.
Backup: Huawei Backup Box-B0 or SmartGuard-63A-S0.
Side by side
| Specification | Sigenergy SigenStor | Huawei LUNA2000-S1 |
|---|---|---|
| Usable capacity (per unit) | 5.2–7.8 kWhPer module: BAT 5.0 = 5.2 kWh, BAT 8.0 = 7.8 kWhSigenergy datasheet, Specification table | 6.9 kWhPer LUNA2000-7-E1 moduleHuawei manual, p.127 |
| Battery chemistry | LFP (LiFePO₄)Sigenergy datasheet, Specification table | LFP (LiFePO₄)Huawei manual, p.128, Cell |
| Maximum usable storage (expanded) | 46.8 kWhcalculatedPer controllerSigenergy datasheet | 20.7 kWhOne stack of 3 modulesHuawei manual, p.127 |
| How it expands | 1–6 battery modules per controllerSigenergy datasheet, p.2, Battery connection | 1–3 modules of 6.9 kWh per stackHuawei manual, p.127, Number of Energy Storage Modules |
| Continuous power (per unit) | 3–6 kWSingle-phase controllers 3.0–6.0 kW; also limited by battery modules (2.5 kW per BAT 5.0, 4 kW per BAT 8.0)Sigenergy datasheet, p.2, Single-phase controller, nominal output power | 3.5–10.5 kWBattery side: 3.5 kW (1 module), 7 kW (2), 10.5 kW (3). Your inverter may allow less.Huawei manual, p.127, Maximum output power |
| Peak power | 4.5–9 kWSingle-phase backup peak for 10 seconds, 4.5–9 kW by controllerSigenergy datasheet, p.2, AC output (backup), peak 10 s | Not documented |
| Architecture | Modular: Energy Controller (hybrid inverter, solar on DC side) plus stacked battery modulesSigenergy datasheet, p.1–2 | DC-coupled high-voltage battery: one control unit plus 1–3 battery modules, connected to a Huawei SUN2000 hybrid inverterHuawei manual, p.127, Performance |
| Max solar input | 6–12 kWSingle-phase controllers 3.0–6.0 SPSigenergy datasheet, p.2, DC input | 5.52–9 kWSUN2000-3.68KTL-L1: 5.52 kWp · 5KTL-L1: 7.5 kWp · 6KTL-L1: 9 kWpHuawei datasheet, Input (PV): Recommended max. PV power |
| Backup switchover time | 0 msNeeds the Sigen Energy Gateway; load-side disruptionSigenergy datasheet, p.2, footnote 1 | Not documented |
| Backup needs | Sigen Energy GatewaySigenergy datasheet, p.2, footnote 1 | Huawei Backup Box-B0 or SmartGuard-63A-S0Huawei datasheet, Backup power output |
| Dimensions | 767 × 270 × 260 (per module)W × H × DSigenergy datasheet | 590 × 360 × 255 per module; control unit 590 × 150 × 255W × H × DHuawei manual, p.128 |
| Weight | 55–70 kgPer module: 55 kg (BAT 5.0), 70 kg (BAT 8.0)Sigenergy datasheet | 68 kgPer module; control unit 10 kg; 3-module system 216 kg with floor bracketHuawei manual, p.128 |
| Warranty (UK) | 10 yearsBattery and Energy Controller; installed on or after 1 June 2023Sigenergy warranty, p.1 | 5–15 yearsmedium confidenceEU terms. 5 years basic; 15 years if the battery stays online with Huawei's FusionSolar monitoringHuawei warranty, p.3, LUNA2000-7/14/21-S1 |
| Capacity guaranteed at end of warranty | 70%70% of usable energySigenergy warranty, p.1 | 60%medium confidenceEU termsHuawei warranty, p.3, Notice 1 |
| Warranty conditions | Must stay connected to the internet for the full 10 years; 5 years minimum otherwise.Sigenergy warranty, p.2 | The long warranty needs internet connection for firmware updates (not offline for over 6 months) and FusionSolar registration. Must be installed and commissioned within a month of leaving the distributor, by a Huawei-certified or qualified installer.medium confidenceHuawei warranty, p.3, Notices 4–6 |
How long each runs your home in a power cut
Every setup we list for both, from a full battery with no solar. Appliance figures are typical estimates; use the calculator below with your own.
| Setup | Usable | Continuous | Essentials (fridge-freezer, lights, Wi-Fi, TV, charging) | Essentials + air-source heat pump (winter) |
|---|---|---|---|---|
| Sigenergy SigenStor · 6.0 SP controller + 1 × BAT 8.0 | 7.8 kWh | 4 kW | 47.5 hours | 4.5 hours |
| Sigenergy SigenStor · 6.0 SP controller + 2 × BAT 8.0 | 15.6 kWh | 6 kW | 3 days 23 hours | 8.9 hours |
| Sigenergy SigenStor · 6.0 SP controller + 3 × BAT 8.0 | 23.4 kWh | 6 kW | 5 days 23 hours | 13.4 hours |
| Huawei LUNA2000-S1 · SUN2000-3.68KTL-L1 + LUNA2000-7-S1 (6.9 kWh) | 6.9 kWh | 3.5 kW | 42 hours | 4 hours |
| Huawei LUNA2000-S1 · SUN2000-5KTL-L1 + LUNA2000-14-S1 (13.8 kWh) | 13.8 kWh | 5 kW | 3 days 12 hours | 7.9 hours |
| Huawei LUNA2000-S1 · SUN2000-6KTL-L1 + LUNA2000-21-S1 (20.7 kWh) | 20.7 kWh | 5 kW | 5 days 6 hours | 11.9 hours |
Try your own appliances
Average draw 156 W from 7.41 kWh available.
Everything on at once: 415 W — within the 4 kW limit
- Starts from a full battery with 0% held back as reserve.
- 5% extra allowed for wiring and standby losses on top of the manufacturer's usable figure.
- Appliance figures are typical averages; your own may differ. Enter your own wattage for the most accurate result.
- Assumes no solar recharging during the outage.
- SigenStor: Warranty figures are from Sigenergy's Europe warranty; confirm UK coverage with your installer.
- SigenStor: Round-trip efficiency is not stated as a single figure in the datasheets we hold.
- SigenStor: Larger single-phase controllers may exist in the UK; this page covers the 3.0–6.0 SP range in the datasheet we hold.
- LUNA2000-S1: Warranty figures are from Huawei's EU terms. Huawei publishes separate UK terms, but we couldn't get a current copy, so check the UK terms with your installer.
- LUNA2000-S1: Round-trip efficiency and depth of discharge aren't stated in the S1 manual.
- LUNA2000-S1: Huawei also sells 5 kWh S1 modules. We've listed the 6.9 kWh module only.
Questions people ask
Which stores more, Sigenergy SigenStor or Huawei LUNA2000-S1?
Sigenergy SigenStor has the higher stated maximum. Sigenergy SigenStor: up to 46.8 kWh (per controller). Huawei LUNA2000-S1: up to 20.7 kWh (one stack of 3 modules). Per unit, Sigenergy SigenStor stores 5.2–7.8 kWh and Huawei LUNA2000-S1 stores 6.9 kWh.
Which can run more appliances at once?
Across the setups we list, Sigenergy SigenStor delivers 4–6 kW continuously and Huawei LUNA2000-S1 delivers 3.5–5 kW. These are the maximums for each setup; installers can set some systems lower. Continuous power limits how many appliances can run at the same time; capacity decides how long they run.
Which has the better warranty?
Sigenergy SigenStor: 10 years, 70% capacity guaranteed at the end. Huawei LUNA2000-S1: 5–15 years, 60% capacity guaranteed at the end. Conditions differ, so check the warranty rows in the table above.
Do Sigenergy SigenStor and Huawei LUNA2000-S1 work with Intelligent Octopus Flux?
Sigenergy SigenStor: Not on Octopus's list. Huawei LUNA2000-S1: Not on Octopus's list. Octopus lists the battery brands it can control in its Intelligent Flux FAQ; see our Intelligent Octopus Flux page for details.
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Sources
- Sigen Battery 5.0 / 8.0 kWh datasheet — Sigenergy. Retrieved 26 Sept 2026.
- Datasheet – SigenStor Home (Energy Controller) — Sigenergy. Retrieved 26 Sept 2026.
- Factory Limited Warranty for SigenStor (For Europe) — Sigenergy. Retrieved 26 Sept 2026.
- LUNA2000-(7/14/21)-S1 User Manual — Huawei, Issue 02. Retrieved 26 Sept 2026.
- SUN2000-2/3/3.68/4/4.6/5/6KTL-L1 Smart Energy Controller datasheet — Huawei, 04-202403. Retrieved 26 Sept 2026.
- Huawei Limited Product Warranty (EU warranty conditions) — Huawei, EU version 2024-03-01. Retrieved 26 Sept 2026.
- Intelligent Octopus Flux: Frequently Asked Questions — Octopus Energy. Retrieved 26 Sept 2026.
Spotted an error? See how we check data. Always confirm your final design with an MCS-certified installer.