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Polar ESS 6kW 5.12kWh storage kit — product photo

Polar ESS · 6 kW · 5.12 kWh · 1-phase Polar ESS kit

Polar ESS 6kW 5.12kWh storage kit

One box number covers a whole install with the Polar ESS 6kW kit: it pairs a 6kW single-phase inverter with a 5.12kWh battery and arrives as a set. The carton holds the inverter, battery, fuse holder, data dongle, feet and the battery-to-inverter cable, so the design is decided before it leaves the shelf.

£1,085.60 ex VAT Stock on request
Pallet freight
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Delivery in 3–5 working days (estimate). The dispatch clock starts at cleared payment.

Description

Buying the kit rather than loose parts is what makes this line quick to quote and quick to fit. The inverter, battery and connecting hardware are matched at source, which removes the guesswork about which cable and which fuse holder belong together. It suits standard single-phase homes wanting a compact storage system in one order line. Above 3.68 kW this needs G99 approval before install, so book the DNO application into the job as normal. Ordering follows the trade model: the ex-VAT price on this page is your account rate, held in UK stock and refreshed with the feed.

Specification

BrandPolar ESS
Part numberPOLAR-6KW-5.12KWH
Power rating6 kW
Capacity5.12 kWh
PhaseSingle-phase
ConditionNew
CategoryParts & accessories · Hybrid Storage Kits
Delivery methodPallet freight (UN3480 Class 9 dangerous goods)

Datasheets & manuals

What it pairs with

The kit is self-contained, but the natural next step is a second Polar ESS 5.12 kWh battery (POLAR-5.12KWH-BATT) with its battery-to-battery cable and feet to grow the stack. Four batteries live neatly in the Polar External Housing with its security cover. Sibling Polar inverters are the 3.6 kW and 6 kW standalone units. As battery counts depend on model and firmware, check Polar's current Polar ESS pairing list before you fix the design.

Single-phase only. Above 3.68 kW this needs G99 approval before install. Supplied as a fixed kit; component swaps are not part of this line. For anything this page can't settle, ask the trade desk before ordering or consult a competent installer.

Polar ESS 5.12kWh battery Polar ESS · £610.65 ex VAT Polar external battery housing Polar ESS · £203.55 ex VAT

Last updated 2026-07-19

FAQ

Polar ESS POLAR-6KW-5.12KWH buying questions

The ex-VAT trade price is shown on this page, with VAT at 20% added on the invoice. Because it is a single kit line, that price stands whether you buy one for a booked job or a handful for the shelf. There are no minimum orders and no spend tiers, so every trade account pays the same rate.
Because the kit contains a lithium battery, it moves as UN3480 Class 9 pallet freight with a DG-capable carrier, kerbside, so have someone on site to receive it. Delivery in 3–5 working days (estimate). The dispatch clock starts at cleared payment. Stock sits on consignment and is confirmed on enquiry rather than shown as a live number.
Stock on request at the last catalogue update, and the count on this page comes from the live stock feed rather than a manual list. In stock means in stock; if the number reads zero, the trade desk can tell you the restock position for this part number.
UK trade buyers with a verified account: limited companies verify with a Companies House number, sole traders with a UTR, MCS or scheme number. No trade minimums — one unit at trade price, no annual-spend tiers.
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