Technical specifications

Technical specifications of the heat battery

Below you will find the most important technical specifications. The inner workings of the Borg T4, explained succinctly.

Buffer volume	4.000 liters (plain water)
Storage capacity	approx. 200 kWh thermal *
Dimensions buffer tank (l x w x h)	approx. 380 x 290 x 160 cm
Heat loss	< 1% per day
Material	EPS200 / EPDM
Design lifetime	50 years

*Comparable to about 60 kWh electric or six 10 kWh electric batteries

This capacity depends on the output temperature in the home. It is sufficient to heat an average new home in winter for about one week without using the heat pump.

Technical specifications of the low-pressure connection set

The connection set consists of two boxes that together make sure the heat battery, the heat pump and the home are in close connection. The central hub! A low-pressure connection set (LP) that is always placed somewhere on the ground floor - and a high-pressure connection set (HP) that can be placed wherever you want.

Dimensions (approx.)	Size of heat interface unit of district heating
Location	Near the buffer tank, always on the ground floor
Controls	The transportation to and from the heat battery
Supply pipe	Wiring harness (approx. 26 cm in diameter) from the buffer tank to the low-pressure connection set
Drainpipe	Supply pipe and drainpipe from LP connection set to HP connection set
Other pipes	Sensor cable between HP connection set, Borg Control Box and LP connection set
Connected to	Heat battery and HP connection set
Working pressure	Unpressurized
Requirements	Ground floor, frost-free room, connection wiring harness (approx. 26 cm diameter) via crawl space or soil, power source, can be outside the house in shed or garage

Technical specifications of the high-pressure connection set

The connection set consists of two boxes that together make sure the heat battery, the heat pump, and the home are in close connection. The central hub! A low-pressure connection set (LP) that is always placed somewhere on the ground floor - and a high-pressure connection set (HP) that can be placed wherever you want.

Dimensions (approx.)	Size of heat interface unit of district heating
Location	In the (technical room of the) home / frost-free room
Controls	The transportation to and from the home
Supply pipe	Supply pipe and drainpipe from the HP connection set to the LP connection set
Drainpipe	Supply pipe and drainpipe from the radiators/floor heating of the home and tap water
Other pipes	Sensor cable between HP connection set and Borg Control Box (BCB). BCB is positioned nearby the HP connection set.
Connected to	Low-pressure connection set and home
Working pressure	Equal to the central heating circuit of the home
Requirements	Power source, located in the high-pressure circuit and for that reason can be placed anywhere in the home

Technical specifications of the wiring harness

The wiring harness is the underground connection between the buffer tank and the low-pressure connection set. It contains all the sensors, water, and power lines needed for communication.

Diameter (approx.)	26 cm
Contents/kinds of pipes	Warm water and cold water pipes, monitoring cables, ventilation and filling pipes, and suction pipes
Connection between	Heat battery and low-pressure connection set
Requirements	Preferably as close as possible to the low-pressure connection set
Bend radius	90 degree curve / 60 cm
Finishing	EPS 250, protection, underground

Borg Control Box (BCB)

The Borg Control Box is a smart and predictive controller. It receives its strategy from the cloud and issues commands to the heat pump and heat battery. The data it uses as input are the weather forecast, dynamic electricity prices, and knowledge about the heat demand of the home in a certain (expected) weather type.

Dimensions (approx.)	30 x 15 x 15 cm
Controls	Receives its strategy from the cloud, issues commands to heat pump and heat battery
Location	Preferably close to the high-pressure connection set
Connected to	High-pressure connection set, thermostat, heat pump controler and the Cloud.
Strategy Software	Monthly subscription to determine strategy, remote updates & diagnostics