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Fox ESS H3 Pro 30kW 3PH Hybrid Inverter
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Fox ESS H3 Pro 30kW 3PH Hybrid Inverter

FE-H3-PRO-30.0
£2,600.17 ex VAT £3,120.20 inc VAT

How many inverters do you need?

Secure Checkout 14-Day Returns Tracked Delivery
High Conversion EfficiencyMore of your solar reaches the home
MPPT TrackingMaximises yield in changing light
Grid CompliantMeets UK G98 / G99 requirements
Technical Specifications
Rated Power (Pmax)30,000 VA
Module Efficiency97.80 %
Battery Voltage150 - 800 V
MPPT Quantity3
Min MPPT Voltage150 V
Max MPPT Voltage850 V
Max Input Voltage1,000 V
Max DC Power45,000 W
Max AC Power (5 min)33,000 VA
Max DC Current32 A
Max DC Inputs6
Integrated DC SwitchOptional
Height560 mm
Width600 mm
Depth225 mm
Weight52.5 kg
IP RatingIP65
Operating Temperature-25 °C to +60 °C, derating at +45 °C
Warranty5 years standard, 10 years when the installation is registered with Fox ESS online
View Full Datasheet

Fox ESS H3 Pro 30kW 3PH Hybrid Inverter

Fox ESS · H3 Pro

Fox ESS H3 Pro 30kW 3PH Hybrid Inverter

Fox ESS H3 Pro — 15 kW to 30 kW commercial storage, with two battery ports and 50 A on each.

The H3 Pro is where Fox's hybrid range crosses into commercial. Fifteen to 30 kW of three-phase output, up to 45 kW of PV, and — the detail that matters — two independent battery ports rated 50 A each rather than one port shared.

Rated AC output
30,000 VAThree phase on-grid output
Backup output
30,000 VAContinuous EPS power in a grid outage
Maximum PV input
45,000 WArray size this inverter accepts
Battery window
150 – 800 VThe architecture it takes
MPP trackers
3Independent roof planes
Peak efficiency
97.80 %Conversion efficiency at best
Backup switch time
<20 msHow fast it takes over
Warranty
5 yearsStandard, 10 years when the installation is registered with Fox ESS online
Important

Please read before ordering

This Inverter can have a MAXIMUM of 2 stacks with 7 modules per stack (1x Master + 6x Slaves), for a TOTAL of 2x Master + 12x Slaves.

FE-LAN-STICK not compatible with this range, please contact Fox for solution - service.uk@fox-ess.com (02475 100078)

Don't forget: You must register your install with Fox online to activate the 10 year product warranty, otherwise it's 5 years as standard. Please click here for registration page. Please check the warranty document for more information.

Overview

About the Fox ESS H3 Pro

Two ports means two stacks, charged and discharged in parallel at 100 A combined. On a commercial site where the battery is sized to carry an evening peak rather than just an evening, that halves the time to fill and doubles the power available on the way out.

Three MPP trackers with two strings each and a 32 A rating handle commercial string lengths, and the AC input runs to 35 kVA for grid charging. EPS peak is 20 % above rated for 60 seconds.

Battery compatibility

Which battery does this inverter take?

This inverter takes High voltage Fox ESS stacks.

This model has a battery voltage window of 150 – 800 V, a maximum charge or discharge current of 50 + 50 A, BMS communication over CAN.

A stack is one master module, which carries the BMS, plus matching slave modules of the same type. Module types are never mixed in one stack. These are the counts this inverter is listed for — Product Compatibility Fox ESS UK 2026, the module count range for this inverter family:

Battery modules this inverter accepts
CQ74 to 24 modules — 28.08 to 168.48 kWh
EQ50002 to 12 modules — 9.84 to 59.04 kWh
EQ48003 to 18 modules — 13.98 to 83.88 kWh
EQ29003 to 14 modules — 8.64 to 40.32 kWh
ECS48003 to 14 modules — 14.22 to 66.36 kWh
ECS4300 / EC43003 to 14 modules — 12.42 to 57.96 kWh
ECS41003 to 14 modules — 12.09 to 56.42 kWh
ECS29003 to 14 modules — 8.64 to 40.32 kWh
EP5 / EP61 to 8 modules — 5.18 to 41.44 kWh
EP11 / EP121 to 8 modules — 11.52 to 92.16 kWh

What we stock that fits this inverter:

Fox ESS CQ7 Master Promo Stock Only4 to 24 modules on this inverter, 28.1 to 168.5 kWh.
Fox EQ5000 4.92kWh HV Battery (Master)2 to 12 modules on this inverter, 9.8 to 59.0 kWh.
Fox EQ4800, 4.66kWh HV Battery (Master)3 to 18 modules on this inverter, 14.0 to 83.9 kWh.

Two figures on this page have to be read together. The warning block above is our own note and limits an H3 Pro to two stacks of seven modules, fourteen in total. Fox's 2026 compatibility table allows more than that on some module types — up to 24 CQ7 or 18 EQ4800 on one inverter. If you are planning a stack larger than fourteen modules, ask us first and we will confirm it with Fox against your inverter's firmware before you order.

Fox high-voltage modules are not mixed: a stack is one type, one master and the matching slaves, and the module count must sit inside the range above for this inverter. A Fox low-voltage battery (LV52) will not work on any of these inverters, and a high-voltage stack will not work on a low-voltage one.
For the installer

String design, battery limits and what is in the box

The details that decide whether this unit suits the job:

  • Two battery inputs, 50 A each, 150 – 800 V, CAN. Note the full-AC-load battery voltage rises with model: 160 V on the 15 kW to 330 V on the 30 kW.
  • Three MPP trackers, two strings each, 32 A per tracker, 40 A Isc, 15 kW maximum PV per tracker.
  • 1,000 V maximum DC (950 V maximum operating — above that the inverter reports a PV overvoltage error), 750 V nominal, 160 V start-up.
  • Full-load MPPT window is narrower than the tracking window and rises with model: 170 – 850 V on the 15 kW to 340 – 850 V on the 30 kW. Design strings to the full-load window.
  • AC input up to 35 kVA. Export control fitted.
  • DC switch, AFCI and string monitoring are all optional on this range.
  • Up to 10 units in parallel. EPS switch time under 20 ms.
  • 600 × 560 × 225 mm, 52.5 kg net. Smart fan cooling; 15 and 20 kW under 45 dB, 25 and 30 kW under 60 dB.
  • Standby consumption is 200 W hot standby, 18 W cold standby — significant on a commercial energy budget.
Applications

Where this hybrid earns its place

The H3 Pro is specified most often for these jobs.

Commercial storage15 kW to 30 kW with two battery stacks.
Peak shavingTwo battery ports at 50 A each for high discharge power.
Farms and workshopsThree-phase supply, large roof, daytime load.
Backup for critical loadsEPS 20 % above rated for 60 seconds.
Multi-unit installationsTen in parallel.
Off-peak charging at scale35 kVA AC input.
Before you order

Things worth knowing about this listing

These notes come from us and from the manufacturer, and they are the ones that most often cause a problem after delivery:
  • A smart meter and a Wi-Fi dongle are included in the scope of delivery.
  • Register the installation with Fox ESS at fox-ess.com to activate the 10-year warranty. Unregistered, the cover is 5 years.
Technical specification

Fox ESS H3-Pro-30.0 technical data

This model
Maximum PV input power45,000 W
MPPT voltage range at full load340 – 850 V
Battery voltage range at full AC load330 – 790 V
Output, backup and performance
Rated AC output power30,000 VA
Maximum apparent AC power33,000 VA
Maximum AC output current50.0 A
Maximum AC input power (grid charging)35,000 VA
Maximum AC input current53.0 A
Backup (EPS) continuous power30,000 VA
Backup (EPS) peak power36,000 VA for 60 s
Backup (EPS) maximum current45.5 A
European efficiency97.40 %
Noise emission<60 dB
Common to the range
Maximum DC voltage1,000 V; 950 V maximum operating
Nominal DC operating voltage750 V
Maximum input current32 A
Maximum short circuit current40 A
MPPT voltage range150 – 850 V
Start-up voltage160 V
Number of MPP trackers3
Strings per MPP tracker2 / 2 / 2
Maximum PV input power per MPP tracker15 kW
Maximum inverter backfeed current to the array0
Battery typeLithium battery
Battery voltage range150 – 800 V
Maximum charge / discharge current50 + 50 A
Number of battery inputs2
Battery communicationCAN
Rated grid voltage400/230; 380/220 V, 3L/N/PE
Rated grid frequency50 / 60 Hz, ±5
Power factor1, adjustable 0.8 leading to 0.8 lagging
Export controlYes
THDi<3 % at rated power
Maximum AC input power35,000 VA on the 20 kW and above
EPS rated output voltage400/230; 380/220 V, 3L/N/PE, 50 / 60 Hz
EPS switch time<20 ms
EPS THDv<3 % at rated power
Parallel operationYes, up to 10 units
MPPT efficiency99.90 %
Maximum efficiency97.80 %
Maximum battery to AC efficiency97.60 %
Maximum PV to battery efficiency98.10 %
Overvoltage categoryIII (AC side), II (DC side)
Surge protectionType II / Type II
AFCI protectionOptional
DC switchOptional
String monitoring functionOptional
Dimensions (W × H × D)600 × 560 × 225 mm
Net weight52.5 kg
InstallationWall mounted
Operating temperature range−25 °C to +60 °C, derating at +45 °C
Storage temperature−40 °C to +70 °C
Relative humidity0 – 95 %, without condensation
Altitude<4,000 m
Protective classI
Ingress protectionIP65, outdoor use
Standby consumption200 W hot standby, 18 W cold standby
CoolingSmart fan cooling
TopologyNon-isolated
CommunicationMeter, Wi-Fi, 4G (optional), DRM, USB, BMS (CAN), RS485
DisplayBacklit 16 × 4 character LCD
Compliance and warranty
Grid connection standardsSee the certification documents attached to this listing
Safety and EMCEN 62109-1, EN 62109-2; IEC 61000-6-2, IEC 61000-6-3
Warranty5 years standard, 10 years when the installation is registered with Fox ESS online
Specification sourceData Sheet Fox H3 Pro Series EN, version 1.6, 22 November 2023
Goes with this

Ordered with this inverter more often than anything else

A hybrid is the middle of a system, not the whole of it. These are the parts our customers add most often:

Fox ESS - EMS to parallel multiple H3 Pro Inverters in a systemThe EMS Fox require to parallel more than one H3 Pro into a single system.
Fox ESS AI Link - EMS Box for 3PH SystemAI Link EMS box for three-phase export limitation and multi-inverter control.
Frequently asked questions

Questions we get asked about this inverter

Why two battery ports?

Two stacks charge and discharge in parallel, 50 A each, 100 A combined. On a commercial site that is the difference between covering an evening peak and merely softening it.

What is the full-load MPPT window for?

The inverter tracks across 150 – 850 V but only delivers full rated output inside a narrower band that depends on the model — 340 – 850 V on the 30 kW. Design your strings to the full-load window or you will not see nameplate output.

Is the DC isolator included?

No, it is optional on this range, as are AFCI and string monitoring. Specify what the job needs.

What is hot standby costing me?

200 W in hot standby against 18 W cold. Over a year that is a real number on a commercial meter — worth discussing with the commissioning engineer.

Which battery?

Fox high voltage stacks, 150 – 800 V. The CQ7 range for H3 Pro is 4 to 24 modules, and the ECS4300 range is 3 to 14.

ClearRay Solar

Documents, advice and trade pricing

Every datasheet, certificate, installation manual and warranty document we hold for this product is in the Documents tab below. See the rest of our hybrid inverter range, our batteries and our solar panels, or email sales@clearraysolar.com if you would like us to check a battery pairing or a string design before you order.

High Efficiency 97.80 %More power from the same roof space
IP65 RatedBuilt for UK weather conditions

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Documents & Certificates
Data Sheet Fox Ess P3 Pro NL (Dutch) Data Sheet Fox Ess P3 Pro/H3 Pro PL (Polish) Data Sheet FOX H3 Pro Series - DE (German) Data Sheet FOX H3 Pro Series - EN
Shipping & Returns

Delivery times vary by region:

  • UK — 1-2 business days
  • Highlands & Islands — 1-2 business days

Returns accepted within 14 days of delivery for unused items in original packaging.