The Fox ESS H3-8.0-E 8 kW Three-Phase Hybrid Solar Inverter is the sweet spot of the H3 range for British photovoltaic systems needing robust three-phase power without oversizing. With 10,400 W maximum PV input and a 8,000 W rated AC output (8,800 VA peak for 60 s), it fits larger homes, farms and light-commercial arrays seeking dependable yield and hybrid readiness.
High-Efficiency Performance for British PV Systems
Two independent MPPT trackers and a wide 160 – 950 V operating window keep strings close to their optimum across changing light and multi-aspect layouts. Peak conversion efficiency reaches 98.5 % (Euro 97.8 %), reducing DC-to-AC losses and supporting strong generation through low-light mornings, overcast days and winter months typical across the UK.
Built for Reliability & Protection
The H3-8.0-E pairs an IP65 weather-sealed enclosure with quiet (<45 dB) fan-assisted cooling for stable operation indoors or out. Safety systems include residual-current and insulation monitoring, anti-islanding, and integrated surge arrestors (Type II DC / Type II AC). Certified to EN 62109-1 & -2 and compliant with G99, it streamlines UK grid connection for professional systems.
Key Features
- 8 kW three-phase AC output with 8,800 VA peak (60 s)
- Dual MPPT with a 160 – 950 V window for flexible string design
- 98.5 % peak / 97.8 % Euro efficiency for strong real-world yield
- IP65 enclosure; <45 dB operation for outdoor or plant-room mounting
- Integrated Type II surge protection and comprehensive grid safety logic
- FoxCloud monitoring via Wi-Fi/LAN (optional 4G)
If you’re wondering how the H3-8.0-E performs in low-light UK conditions, its wide MPPT window and responsive tracking help maintain meaningful output under diffuse light or partial shading — common on multi-aspect British roofs.
Specification data verified from Fox ESS H3 Series Datasheet BE-V1.3 (2023/06/07).
Considering system size? Step down to the H3 6 kW or up to the H3 10 kW, and pair with high-quality solar panels and battery storage from LAMPS.
Seamless Integration with Solar Panels & Battery Storage
The H3-8.0-E integrates cleanly with premium solar panels and Fox high-voltage LFP batteries (180 – 600 V). A typical UK home might begin around 10 – 13 kWh and scale storage upwards as demand grows. Direct DC coupling reduces conversion losses and improves charge response for higher self-consumption.
Smart Monitoring & Connectivity
FoxCloud provides real-time visibility via built-in Wi-Fi and LAN, with optional 4 G for remote or rural sites. Communications include RS485, CAN, DRM, ripple control and USB for straightforward integration with meters, battery BMS and smart-home controls.
Compact Design & Dimensions
High power density in a practical footprint: 449 × 519 × 198 mm, approx. 28 kg. The IP65 aluminium housing and <45 dB cooling enable reliable outdoor or plant-room installation. Access-friendly terminals support neat, safe routing on sound wall structures.
Installer Guidance & System Notes
String design & MPPT layout
Use the 160 – 950 V MPPT window and observe current limits (up to 16 A per tracker). On mixed orientations, dedicate one MPPT per roof aspect to maximise yield.
Battery configuration & sizing
Start around 10 – 13 kWh for most UK homes; expand modularly as usage grows. The high-voltage LFP platform enables scalable capacity without changing the inverter.
Grid compliance & safety
Fully compliant with G99 and certified to EN 62109-1 & -2. Residual-current and insulation monitoring plus Type II SPDs support safe commissioning and operation.
Why We Recommend the Fox ESS H3-8.0-E
LAMPS recommends the H3-8.0-E when projects need reliable three-phase output, strong low-light behaviour and robust IP65 construction. Installers value its straightforward commissioning, comprehensive communications and dependable MPPT performance across British conditions.
LAMPS is the renewable division of LAMPS Electrical — an independent UK wholesaler with 15+ years supporting professional installers nationwide.
Compare Models in the Fox H3 Range
| Model |
Max PV (W) |
Rated AC (W) |
MPPTs |
MPPT Window (V) |
Max Eff. |
Dimensions (mm) |
Weight (kg) |
| H3-6.0-E |
9,000 |
6,000 |
2 |
160 – 950 |
98.5 % |
449×519×198 |
28 |
| H3-10.0-E |
13,000 |
10,000 |
2 |
160 – 950 |
98.5 % |
449×519×198 |
35 |
FAQs – Fox ESS H3-8.0-E 8 kW Three-Phase Hybrid Solar Inverter
How does the H3-8.0-E compare to the H3-6.0-E?
The H3-8.0-E increases rated AC output to 8,000 W (vs 6,000 W) and supports a larger 10,400 W PV input, suiting bigger arrays.
Is it compatible with Fox ESS batteries?
Yes — it supports Fox high-voltage LFP batteries, enabling scalable storage to match your usage profile.
Can it be mounted outdoors?
Yes. The IP65 enclosure and <45 dB cooling make it suitable for outdoor walls or plant-rooms in British weather.
How is the system monitored?
Via FoxCloud, using built-in Wi-Fi/LAN or optional 4 G for remote sites.
What are the size and weight?
The unit measures 449 × 519 × 198 mm and weighs around 28 kg.
For expert guidance on compatibility or three-phase system design, contact LAMPS — trusted UK distributor of Fox ESS and leading solar brands.
