Products

BOS HS25 / HS50 / HS100. SMART ENERGY.

INNOVATIVE HYBRID STORAGE SYSTEMS IN THREE SIZES RANGING FROM 250Wh TO 1800Wh CAPACITY WITH 180W POWER


BOS HYBRID SYSTEMS STORE ENERGY IN LITHIUM AND LEAD ACID BATTERIES AND MANAGE THE STATE OF CHARGE OF BOTH THE LITHIUM AND THE LEAD ACID BATTERY IN AN INTELLIGENT WAY.


THE HYBRID BATTERY IS THE CENTRAL UNIT OF A SOLAR HOME SYSTEM

 


 

1 HYBRID BATTERY SYSTEM
The BOS hybrid system is the central unit in the solar home system. It comes with integrated lithium (LiFePO4) batteries. The hybrid system contains a combined, fully featured charge controller for lithium and lead acid batteries that manages the state of charge of both batteries in an intelligent way.

2 SMART LOAD MANAGEMENT
An excess energy output is only switched on, if excess power is available. This helps to run fans, chargers or other high power devices only if there is enough energy. It automatically keeps enough energy for devices that need to be available 24/7. All hybrid systems come with an integrated USB port.

3 LEAD ACID BATTERY
BOS hybrid systems work with AGM, gel and standard lead acid batteries. Already existing batteries can be used as well. The state of charge of the lead acid battery is controlled in an intelligent way and includes all relevant protection and performance features.

4 EASY TO INSTALL
Lithium battery and hybrid charge controller are one unit. A lead acid battery, the solar generator and different loads are simply connected to the BOS hybrid systems using standard wire connectors. There is no need to configure any lithium battery parameters by the customer.


LITHIUM PERFORMANCE AT LEAD ACID COSTS

In pure lead acid systems, batteries often fail within 1 to 3 years, as batteries get damaged by continuous operation at low states of charge. Pure lithium systems perform way better and show longer lifetimes, but are very expensive. Initial investment costs for hybrid systems are close to the costs of pure lead acid systems and approx. 50% lower than pure lithium systems. As costs per stored kWh are around 60% lower in hybrid systems than in lead acid systems, the hybrid system becomes the most cost effective option already in the first 3 years.


HS25 / HS50 / HS100 SYSTEMS ARE AVAILABLE IN TWO HOUSING VERSIONS.

DUST & WATERPROOF IP65 INDUSTRIAL HOUSING

PC160088 frei 2.1

 

 


LITHIUM FOR CYCLING, LEAD ACID FOR BASIC LOAD

BOS hybrid systems combine the advantages of both battery technologies. During the day the lead acid battery is charged with higher priority, resulting in long hours at full state of charge. Surplus energy is stored in the lithium battery, which is used for small cycles and operated in its perfect operation mode by taking advantage of its DOD >90% and its high cycle life. The lead acid battery is only used to power loads once the lithium battery is flat, offering additional power and high backup capacities, whilst staying in a high state of charge at most times.


LONGER BATTERY LIFETIME

The lead acid battery is not strained by deep charging cycles, as the lithium battery is used for running daily cycles. During its long hours at full state of charge the lead acid battery is floated. Compared to pure lead acid systems both effects positively impact the lead acid battery lifetime. By preventing harmful sulphation the lifetime can be increased to more than 10 years. This lowers energy storage costs significantly and has a positive impact on the environment. The lithium battery offers enough charging cycles for more than 10 years of daily use.


EASY UPGRADE OF LEAD ACID SYSTEMS

In existing lead acid systems the battery capacity can be increased by adding lithium (whilst it is technically not recommended to mix old and new lead acid batteries). As BOS hybrid systems feature state of the art lead acid charging, all different kinds of lead acid systems can be upgraded. In existing off-grid systems, the old charge controller simply needs to be replaced by the BOS hybrid system. This improves system performance and decreases power costs immediately. The electrical installation can stay the same, hence efforts and additional costs are minimized.


HS25 / HS50 / HS100 SYSTEMS KEY TECHNICAL SPECIFICATIONS

Tabelle Technical Specification 2 2

made in germany logo 2 2


 SMART SYSTEM SIZING EXAMPLES

Weltkarte Irradiation 2


INSTALLATION VIDEO MANUALS

 

BOS LE300. LITHIUM EXTENSION.

EXTEND ANY LEAD ACID BATTERY SYSTEM WITH LiFePO4 HYBRID TECHNOLOGY


THE LE300 LITHIUM BATTERIES ARE A FULLY SCALABLE SOLUTION TO ENHANCE PERFORMANCE AND ADD CAPACITY TO LEAD ACID BATTERIES IN SOLAR AND ANY OTHER KIND OF ENERGY STORAGE SYSTEMS. THEY CAN BE USED WITH NEW OR EXISTING 12V LEAD ACID BATTERIES. JUST STACK THEM IN PARALLEL TO MEET YOUR SPECIFIC SYSTEM SPECS.

LE300 6er 1

 

ees AWARD2016 Logo finalist EN Pfade


 

Like in all BOS AG Hybrid battery systems the lithium battery takes most of the charging cycles while the lead acid battery provides inexpensive backup capacity. The lead acid battery is charged with higher priority,the lithium battery takes all surplus energy. This helps to increase the lead acid battery life.
The system recognizes the lead acid battery voltage and automatically starts to support the lead acid battery witha maximum current of 12.5A per unit. Bigger loads get supplied by the lead acid and the lithium battery in parallel, resulting in smaller currents for each battery.

 


LITHIUM PERFORMANCE AT LEAD ACID COSTS

In pure lead acid systems, batteries often fail within 1 to 3 years, as batteries get damaged by continuous operation at low states of charge. Pure lithium systems perform way better and show longer lifetimes, but are very expensive. Initial investment costs for hybrid systems are close to the costs of pure lead acid systems and approx. 50% lower than pure lithium systems. As costs per stored kWh are around 60% lower in hybrid systems than in lead acid systems, the hybrid system becomes the most cost effective option already in the first 3 years.


CORE BENEFITS

Flexible capacities by simply connecting several packs

• State of the art LiFePO4 batteries

• Retrofitting & extension of already installed systems without change in wiring or other components

• No additional controller needed, simply connect directly to the lead acid batteries

• Lead acid battery is charged with higher priority, lithium battery is discharged first

• Lithium performance and lead acid cost advantages are combined

• Plug & Play > simply connect two cables

• Robust aluminium housing with variable fixing possibilitiesway.

 


LITHIUM FOR CYCLING, LEAD ACID FOR BASIC LOAD

BOS hybrid systems combine the advantages of both battery technologies. During the day the lead acid battery is charged with higher priority, resulting in long hours at full state of charge. Surplus energy is stored in the lithium battery, which is used for small cycles and operated in its perfect operation mode by taking advantage of its DOD >90% and its high cycle life. The lead acid battery is only used to power loads once the lithium battery is flat, offering additional power and high backup capacities, whilst staying in a high state of charge at most times.


LONGER BATTERY LIFETIME

The lead acid battery is not strained by deep charging cycles, as the lithium battery is used for running daily cycles. During its long hours at full state of charge the lead acid battery is floated. Compared to pure lead acid systems both effects positively impact the lead acid battery lifetime. By preventing harmful sulphation the lifetime can be increased to more than 10 years. This lowers energy storage costs significantly and has a positive impact on the environment. The lithium battery offers enough charging cycles for more than 10 years of daily use. The lithium battery furthermore recharges the lead acid battery in case that it didn't get fully charged during the day, a case whoch frequently happens in solar applications.


EASY UPGRADE OF LEAD ACID SYSTEMS

In existing lead acid systems the battery capacity can be increased by adding the LE lithium extension battery (whilst it is technically not recommended to mix old and new lead acid batteries). The LE300 simply needs to be connected with + and -  straight to the lead acid battery (or the lead acid battery ocnnectors at the charge controllers). This improves system performance and decreases power costs immediately. The LE300 works with any standard lead acid battery charge controller that runs on 12V; any 12V lead acid battery component can be used. In existing systems the electrical installation can stay the same, hence efforts and additional costs are minimized.


LE300 SYSTEM KEY TECHNICAL SPECIFICATIONS

LE300 Technical Data Table ver01

 

 

 

made in germany logo 2 2

SMART DC GRID. SMART FEATURES.

 

BOS PT - DC GRID SIGNAL TRANSMITTER

BOS PM - DC GRID SMART POWER METER


DC GRIDS ARE THE MOST EFFICIENT AND COST EFFECTIVE OPTION FOR RURAL ENERGY ACCESS AT LOCATIONS WITH HIGH BUILDING DENSITY AND FOR RESIDENTAL HOMES WITH RENTED OUT ROOMS.


For setting up a smart DC-grid two components are needed (next to a solar home system as central energy hub). Power meters at each household and a grid signal transmitter at each energy hub. Both products, the PM10 and the PT20, share the same housing, but have different functionalities and features.

PM PT Bild


STRUCTURE OF A DC GRID WITH POWER METERS AND POWER TRANSMITTERS

 

1 CENTRAL ENERGY STATION
A central energy station, equipped with a solar home system and the BOS PT grid signal transmitter forms the central unit of a SMART DC Grid. The central energy station can be any 12 VDC lead acid solar home system, hybrid systems from BOS are recommended.

 

 

2 DC GRID CONNECTED HOUSEHOLDS
Individual households /users, each one equipped with the BOS PM smart power meter, are DC grid connected with the central energy station.

 

 BOS PM10 PT10 haus Grafik3

3 INTELLIGENT POWER TARIFFS
The PT transmitter communicates through signals with the PM power meters. Power tariffs are less expensive during daytime and more expensive during night time. During times of excess energy in the grid the tariffs get cheaper, and respectively more expensive during times of low energy levels.

4 INTELLIGENT LOAD MANAGEMENT
The SMART DC grid switches excess energy loads and emergency lights automatically. Once the state of charge of the DC grid reaches full level, each meter automatically switches on a separate excess energy load output. This excess energy output powers big loads only during times of excess energy when tariffs are cheap, hence households optimize their energy costs. Once the state of charge of the DC grid reaches a low level, all loads are automatically disconnected. If users finish their daily energy quota, they can still use an emergency light.


 COST COMPARISON DC MINI GRID VS. AC DIESEL GRID

The DC grid operator employs a workable business model, which has been proven to be effective over decades of use in AC diesel grids. With reasonable hardware costs, maintenance that is close to zero and no generation costs, DC grids are the superior solution compared to AC grids.


ACCOUNTS COMPARISON DC MINI GRID VS. AC DIESEL GRID

Stand-alone DC grids offer an inexpensive way to achieve energy access for all. Initial investment costs per household are very low. Through the sales of energy to DC grid connected households, a continuous cash flow is achieved for the grid operator. Individual households pay as much as they did before for a significantly improved energy service.


SMART PAYMENT MODELS

The meter counts the user’s energy quota downwards until it reaches level zero. Then it turns off the loads until a reset signal from the grid sets the meter level back to a high value. This reset signal occurs on a regular basis, depending on the grid operator. Users can choose different energy quotas and pay accordingly.


SELL ENERGY TO ROOMS / IMPROVE ROI

In residential homes with rented out rooms, hotels or buildings with several flats, DC mini grids can be employed to provide energy to each user based on individual tariffs. In case a bigger solar system is already available return on investment can be improved significantly by selling energy to neighbours.


PM10 & PT20 KEY TECHNICAL SPECIFICATIONS

Characteristic

PM10 PT20

Role in DC grid

DC power meter at

each user

Feed-in power transmitter at

each energy station

Nominal System Voltage

12VDC 12VDC

Max. load output current

 5A (10A peak) 20A

Integrated USB charging port

1 port 5V/1A 1 port 5V/1A

Size housing

130x100x75mm 130x100x75mm

Weight

 350g 350g

Recommeded wiring small grid

(e.g. in-house @ residential homes)

4mm² 3 phase cables, max. 20m radius

around Power Transmitter

Recommeded wiring extended village grid

 10mm² 3 phase cables, max. 50m radius

around Power Transmitter

 


 SMART DC GRID SIZING EXAMPLES