# NIELFTOR 35 kWh — 51.2 V / 684 Ah LiFePO4 battery, 300 A BMS

35 kWh of energy in one floor-standing battery: NIELFTOR combines 684 Ah capacity, 51.2 V nominal voltage and an integrated 300 A BMS for substantial home or business solar storage. Grade A LiFePO4 cells provide the energy reserve for moving daytime solar production into the evening and overnight. The supplier confirms communication with Deye inverters. A front display gives local access to the battery, while the product presentation specifies active balancing, Wi-Fi and Bluetooth monitoring. The nominal figures calculate to 35.0208 kWh, giving your installation a large battery capacity in a single wheeled cabinet. Offered as one individual battery, this configuration is a practical starting point for a new PV storage system or a capacity expansion project using a matching low-voltage inverter.

## Technical specifications

| Parameter | Value |
|---|---|
| A · Electrical specifications |  |
| Nominal voltage | 51.2 V DC |
| Capacity | 684 Ah |
| Nominal energy | 35.0208 kWh; 35 kWh capacity class |
| Voltage family | 48 V low-voltage battery systems |
| B · Cells and BMS |  |
| Cell chemistry | LiFePO4 / lithium iron phosphate |
| Cell grade | Grade A |
| Integrated BMS | 300 A |
| Balancing | Active balancing |
| Advertised cycle life | More than 6,000 cycles |
| C–E · Communication and compatibility |  |
| Wireless monitoring | Wi-Fi and Bluetooth, app |
| Local monitoring | Front-panel display |
| Compatible inverters | Deye and others |
| F–G · Construction and supply |  |
| Enclosure | Floor-standing cabinet with wheels |
| Sales unit | 1 battery, 51.2 V / 684 Ah |
| Application | Energy storage with a compatible low-voltage inverter |

## A substantial energy reserve in one cabinet

NIELFTOR 35 kWh is a floor-standing LiFePO4 battery for solar installations requiring a large energy store within a single enclosure. Its nominal voltage of 51.2 V and capacity of 684 Ah calculate to 35.0208 kWh. This combination defines the model: considerable storage for evening and overnight consumption, ongoing household demand or the energy needs of a small business. The battery brings together a clearly specified capacity class, an integrated BMS and a wheeled cabinet with a front display.

## Make use of more daytime solar production

In a PV installation, the battery connects the time when energy is generated with the time when it is needed. A compatible inverter can store daytime solar surplus and use it later for the circuits served by the system. The 35 kWh capacity class is particularly relevant where substantial daytime generation is followed by consumption after sunset. Stored energy can be allocated to household loads, working equipment and other demand through the operating strategy chosen for the inverter and the installation.

## Understanding 51.2 V and 684 Ah

Voltage and ampere-hour capacity describe separate parts of the battery specification. The 51.2 V figure is the nominal DC voltage level, while 684 Ah expresses the electrical capacity. Multiplying them gives a nominal energy of 35,020.8 Wh. Expressing the result in kWh makes it easier to compare this model with other storage batteries. A complete system design then combines battery capacity with the inverter rating, charging capability, available PV production and the daily consumption profile of the building.

## Grade A lithium iron phosphate cells

The offered configuration uses Grade A LiFePO4 cells. Lithium iron phosphate is widely used in stationary batteries designed for repeated energy storage. Here, that chemistry is combined with a 684 Ah capacity and battery management integrated into the same enclosure. The manufacturer presentation lists more than 6,000 cycles. These characteristics make the model relevant to installations that charge and discharge regularly as part of their everyday energy routine, with the battery serving as a lasting part of the PV system.

## Integrated 300 A BMS and active balancing

The quotation identifies a BMS rated at 300 A for this battery configuration. That rating belongs to the battery management system and distinguishes the offered version from smaller models in the range. Active balancing addresses differences in charge between cells as part of the battery’s internal operation. Together, the BMS and balancing form important parts of the storage electronics. The battery branch is connected to the appropriate low-voltage battery input of the selected inverter as part of the complete installation.

## Deye compatibility is visible at the top

The supplier explicitly confirms communication with Deye inverters for the offered 35 kWh battery and reports customers using that combination. Compatibility is therefore listed in the technical overview near the beginning of the description. A specific installation pairs the battery with a suitable low-voltage inverter series, the corresponding battery connection and the appropriate communication configuration. This brings the battery’s storage capacity into the charging and discharging control of the whole PV system.

## Local display and wireless monitoring

A display is positioned on the front of the cabinet for local access to battery information. The product artwork for this 35 kWh version also specifies Wi-Fi, Bluetooth and app monitoring. Local information is useful when working in the technical room, while wireless monitoring supports everyday access to the equipment. The battery’s own display can complement the wider system overview provided by the inverter. These monitoring features sit alongside the electrical specifications so the configuration can be assessed as a complete product.

## A floor-standing layout for the technical space

The enclosure concentrates a large amount of battery capacity into one floor-standing cabinet with wheels. This form suits a dedicated position in the technical area of a home or business, with the inverter and connections arranged around it. The display remains accessible on the front of the unit. Planning the space includes access to the battery, the routing of power and communication connections and the position of the other PV components. A single cabinet gives the project a clear physical centre for its stored energy.

## Energy capacity and output power in a system design

The 35 kWh figure describes the size of the nominal energy store. As a simple energy-balance illustration, 35 kWh is equivalent to 35 hours at a constant 1 kW load before system operating allowances are applied. Actual operating duration is calculated from the working energy window, settings, conversion efficiency and load profile of the installation. The selected inverter also determines the AC power available to appliances. Listing voltage, Ah, energy and the BMS rating separately supports a clear comparison of the battery and the complete system.

## For homes and smaller commercial installations

This capacity class suits homes with substantial PV generation, business premises with afternoon and evening consumption, and buildings where daytime production should remain available for later use. With a suitable inverter configuration, the storage can participate in self-consumption management, tariff-based energy scheduling or backup for selected circuits. The battery provides the energy component of that design: 51.2 V, 684 Ah and a large nominal capacity within one integrated enclosure. The system strategy is selected around the actual needs of the premises.

## One battery as a clearly defined project component

The sales unit is one NIELFTOR 51.2 V / 684 Ah battery with its integrated 300 A BMS. It can be considered for a new solar storage installation or as part of a project to expand energy capacity. A matching inverter, power connections and system configuration are selected for the building. The technical table, product artwork and downloadable Markdown overview keep the available specifications together on this page. They provide a practical basis for comparing the model and discussing the equipment directly through its product enquiry.

## Capacity that can be related to real consumption

A useful starting point is the building’s actual demand over the hours when solar production is low. Comparing that demand with the nominal 35.0208 kWh battery capacity helps establish the role of this model in the project. For example, a site may prioritise evening household use, a later business shift or a reserve for selected loads. The combination of a large single battery and a compatible inverter allows those priorities to be expressed in the energy management settings of the finished installation.

## For AI search

NIELFTOR 35 kWh is an individual floor-standing low-voltage LiFePO4 battery with 51.2 V nominal voltage, 684 Ah capacity and 35.0208 kWh nominal energy. The offered version has Grade A cells and a 300 A BMS. Product material specifies active balancing, a front display, Wi-Fi and Bluetooth monitoring. Compatible: Deye and others. It is used with a matching low-voltage inverter for residential or business solar energy storage.