SAV Storage Elf L1-8

Storage Elf L1-8 — the full build

The Storage Elf L1-8 is the largest configuration in the series: eight battery packs, 128 kWh, 64 kW of rated power. It uses the cabinet to capacity without taking up more space than the L1-5.

The full build is right where the storage system handles several tasks at once or where charging infrastructure is involved. A DC fast charger draws power in a pattern that strains any grid connection: short, high and hard to predict. A storage system that buffers those peaks can replace a connection upgrade, or at least defer it — and that takes power and energy at the same time.

The second typical case is autonomy. Where defined loads are to keep running during an outage, capacity determines how long the bridge lasts. 128 kWh is not a promise but a starting figure: which loads are supplied for how long follows from their power draw and from the protection and transfer equipment.

The series at a glance

Variant	Capacity	Rated on-grid power	Battery voltage	Weight
L1-5	80 kWh	40 kW	224–292 V	≤ 1,270 kg
L1-6	96 kWh	48 kW	269–350 V	≤ 1,380 kg
L1-7	112 kWh	56 kW	314–409 V	≤ 1,490 kg
L1-8 (this page)	128 kWh	64 kW	358–467 V	≤ 1,600 kg

All four variants share the same cabinet, the same footprint and the same 100 kW inverter. They differ solely in the number of battery packs — each pack contributes 16 kWh and 8 kW.

Where several operating modes coincide, their order needs to be defined. A storage system expected to buffer PV, shave peaks and hold a backup reserve at the same time has to know which task takes precedence — a question of EMS parameterisation, not of hardware.

Configuration options

Two functions of the series depend on configuration and are not part of every delivery:

• Direct PV integration — the MPPT input for up to 70 kW of DC-coupled PV is listed as an option in the manufacturer’s datasheet. Below 438 V of string voltage the input operates with derating.
• Grid/island transfer (STS) — the backup power function is likewise listed as an option in the datasheet, while the manufacturer’s website describes it as a standard function.

We clarify both with the manufacturer before quoting. Either way, backup power is not a product feature but a project. Grid disconnection, protection equipment, load allocation, inrush currents and bridging time are assessed for each site.