
Fox ESS 5kW F Series 1PH Dual Tracker PV Inverter
Fox ESS 5kW F Series 1PH Dual Tracker PV Inverter
Fox ESS F Series — Dual tracker, 3 kW to 6 kW, and upgradeable to storage later.
The F Series is Fox ESS's dual-MPPT single-phase range, and its distinguishing feature is that it is battery ready: paired with a Fox ESS charge controller it becomes a storage system without replacing the inverter. For a customer who wants solar now and a battery when the budget allows, that removes the usual penalty of buying twice.
About the Fox ESS F Series
Two independent trackers with one string each handle the split and shaded roofs that dominate the UK housing stock, and a 120 V start-up with an 80 – 550 V MPPT window keeps string design flexible on awkward pitches.
It is 402 × 476.5 × 148 mm and 15.5 kg — a solid wall unit rather than a pocket one — rated IP65, convection cooled and quoted under 30 dB, so it is at home in a garage, utility room or outside wall.
String design, certification and what is in the box
The details that decide whether this unit suits the job:
- Two independent MPP trackers, one string each, 12.5 A per tracker and 15 A Isc.
- Battery ready: add a Fox ESS charge controller later rather than replacing the inverter.
- DC switch and surge protection are options on this range — check the SKU before you quote an isolator.
- G98 and G99 both certified, plus EN 50549-1 and VDE-AR-N 4105.
- RS485, meter/CT and DRM as standard; LAN, Wi-Fi, GPRS or 4G monitoring optional.
Where this inverter earns its place
The F Series is specified most often for these jobs.
Can I add a battery to this?
This is a grid-tied PV inverter. It converts solar DC into AC for the property and the grid, and it has no battery port. That is not a shortcoming — it is the right architecture for a system without storage, and it is why it costs what it does.
If storage is on the roadmap, you have two routes. Add an AC-coupled battery system alongside this inverter later, which works with any PV inverter and needs no change to what is already installed. Or choose a hybrid inverter now and pay for a battery port you will use in a year or two. We are happy to talk that trade-off through before you order.
Things worth knowing about this listing
- You must register the installation with Fox ESS online to activate the 10 year product warranty. Without registration it is 5 years as standard. See the warranty document in the Documents tab for the registration link and the full terms.
Fox ESS F5000 technical data
Questions we get asked about this inverter
What does 'battery ready' actually mean here?
It means you can add a Fox ESS charge controller and a battery to the DC side later, rather than replacing the inverter with a hybrid. It is not the same as a hybrid inverter with a built-in battery port — there is an extra box — but it does protect the original investment.
Which model for a typical 4 kW array?
The F3600 if you are notifying under G98 and want to stay under 3.68 kW, or the F4600 / F5000 if you are applying under G99 and want the headroom.
Is the DC isolator included?
It is an option on this range. Confirm the SKU or budget for an external isolator.
How does it compare to the newer G3?
The G3 is the current generation with a higher 600 V input, wider MPPT window, 20 A per tracker and 97.6 % peak efficiency. The original F Series is still a sound unit and is often the value choice.
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 inverter range and our solar panels, or email our sales team at sales@clearraysolar.com if you would like us to check a string design or a compatibility question before you order.
Build your complete solar system
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.


