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Fox H1 3.0kW Hybrid Inverter with EPS 1PH Gen 2
Fox ESS Fox H1 3.0kW Hybrid Inverter with EPS 1PH Gen 2
Fox H1 3.0kW Hybrid Inverter with EPS 1PH Gen 2
Fox ESS H1 Series (Gen 2) with EPS — The volume single-phase hybrid: 16 A per tracker, 40 A battery, ten in parallel.
The G2 is the current H1 and the changes over the original are all in the places that constrain a design. DC current per tracker goes from 12.5 A to 16 A, which is what modern 450 W and larger modules need. The battery window widens to 80 – 480 V and battery current rises to 40 A, so the stack charges and discharges faster. And up to ten units can run in parallel, which takes the platform well past a single house.
About the Fox ESS H1 Series (Gen 2) with EPS
Backup is the reason most people buy a hybrid, and the G2 is honest about it: EPS output matches the rated AC power, with a 60-second peak roughly 20 % above that, and switchover in under 20 milliseconds. That is fast enough that a desktop computer does not reboot.
Round-trip matters more than headline efficiency on a hybrid, and Fox publish both halves: 98.5 % PV to battery and 97.0 % battery to AC at full load.
Which battery does this inverter take?
This inverter takes High voltage Fox ESS stacks.
This model has a battery voltage window of 80 – 480 V, a maximum charge or discharge current of 40 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:
What we stock that fits this inverter:
String design, battery limits and what is in the box
The details that decide whether this unit suits the job:
- Battery window 80 – 480 V, LFP, 40 A maximum charge or discharge, CAN.
- Two MPP trackers, one string each, 16 A per tracker and 20 A Isc. 600 V maximum DC, 75 V start-up.
- Note the per-tracker input power split: on the 3.0 kW it is 2,250 W per tracker, rising to 4,500 W per tracker on the 6.0 kW. The array must be balanced across both.
- Up to 10 units in parallel. EPS switch time under 20 ms.
- DC switch and battery wake-up are fitted; AFCI is optional. SPD is DC Type II / AC Type III.
- The 3.7 kW model is 3,680 VA for G98; 4,048 VA otherwise.
- 434 × 418 × 185 mm, 22 kg, IP65, natural cooling, 35 dB.
Where this hybrid earns its place
The H1 Series (Gen 2) with EPS is specified most often for these jobs.
Things worth knowing about this listing
- CT clamps and a Wi-Fi stick are included in the box.
- A second CT clamp is required if the property has another generation source on the same supply — another PV system, wind or CHP.
- A meter is required where the cable run between the inverter and the incoming supply position is more than 30 m.
- Register the installation with Fox ESS at fox-ess.com to activate the 10-year warranty. Unregistered, the cover is 5 years.
Fox ESS H1-3.0-E-G2 technical data
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:
Questions we get asked about this inverter
What can the backup output actually run?
The EPS matches the inverter's rated power — 5,000 VA on the H1-5.0 — with a 60-second peak of 6,000 VA for motor starting. That covers a fridge, freezer, lighting, boiler, router and sockets comfortably. An electric shower or a heat pump on full output does not fit.
How fast does it switch over?
Under 20 milliseconds. Most equipment does not notice.
Do I need optimisers?
No. This is a conventional two-tracker hybrid; put each roof plane on its own tracker.
Which battery does it take?
Fox ESS high voltage stacks inside the 80 – 480 V window. The module count depends on the battery family — Fox publish a matrix, and we list the CQ7 ranges on the battery pages.
Can I run more than one?
Yes, up to ten in parallel.
What warranty?
5 years as standard, 10 years if you register the installation with Fox ESS online. Registration is not automatic — it has to be done.
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.
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Everything you need in one place.
- Inverters
- Batteries
- Mounting Systems
- Cabling & Accessories
- Protection Devices
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.
