A combined Energy Solution - Alfons Container
GWL/Power supplied the Winston Battery cells for the integrated hybrid energy solution called“Container Alfons”. This solution integrates the energy from three sources - solar, wind and a backup diesel generator.
Be sure to contact GWL/Power for more details and for the reference to this and similar projects.
High Power Charger for 12V to 24V applications
Hint: This charger can be used for charging the LTO cells for charging up to 24.5V (up to 8 cells).
FAQ: I check the specification of DC/AC inverters; I see there are 12V, 24V and 48V models. Which should I choose?
Answer:For the DC/AC inverters we suggest to stay with up to 100Amp of DC currents between the battery and the inverter. As a result, the 12V 100Amp DC will allow up to 1200W of power. 24V 100Amp will allow up to 2400 Watts. For higher powers we suggest to use the 48V DC systems.
For currents of up to 100Amp we suggest to use the 25mm2 cables. .
FAQ: What is the difference between the DC/AC inverters in your offer and the products in local hobby shops?
Answer: There are many low cost DC/AC inverters available in the hobby shops or car accessories shops or on the internet. We had tested some of these products in the past. Our comment is this: These products are designed for an occasional usage in a case of power needs in off-grid applications (e.g. during camping on a holiday). They are not designed for a continuous operation. Of cause some customer use these products in their applications and are satisfied, however these low cost products cannot be offered in large quantities for projects where a certain quality of service needs to be guaranteed.
On the other hand the DC/AC inverters offered by GWL are designed and purposed for a continuous operation in off grid solutions. That is why they are more robust, use more reliable and long time lasting components and are designed for long term operation. As a result these products are more expensive. Simply said there is no good way to get a quality product for a cheap price.
For operation WITHOUT GRID, you need the OFF-GRID inverters.
The OFF-GRID inverters are also called the DC/AC inverters,
they convertert the energy from battery to the 230V AC power.
The off-grid inverters cannot be connected with the Grid.
For the DC/AC products, please see here:
See also the support information here:
For charging the battery from the solar panel, the solar regulator you need.
See the description in the thread: Solar Regulators/Chargers (MPPT, PWM)
Making your own island power system is not difficult. It is necessary to fit all the components together properly within manufacturers specification. We have divided this issue into three basic tasks:
First task it so fit the solar regulator and solar panel
MPPT solar regulator 12/24V tracer 10a, input 100v (TR-1210rn) is very suitable for single 240Wp solar panel by the maximum input power capability.
Maximum input power of TR-1210rn is 260W if 24V battery is used. This almost matches maximum power of selected Schutten 240Wp panel, which is 240W peak. Selected regulator and solar panel are perfect match.
For areas with not so perfect solar conditions it is possible to connect more solar panels. Both serial and parallel connection is possible. Please see attached schema.
If 240Wp panel in not ideal conditions supplies for example 60W under normal sunlight, it is possible to connect more panels in parallel. Maximum PV power 260W / 60 = 4 solar panels in parallel
Solar Tracer regulator TR-1210rn allows input up to 100V.
Open circuit voltage of selected Schutten 240Wp panel is 29.9V. 100 / 29.9 = 3 solar panels in series
We suggest solutiondescribed in attached schema.
We also suggest to devide the system by 3pcs of 3kW Inverters on 48Vat input to reduce the input current.
There are following items in the system by attachment:
18x 290Wp solar panels
16x LiFePO4 cells for 48V battery pack
1x BMS123 OFFGRID to protect the cells
14x cell module
1x cell module IN
1x cell module OUT
Inverter DC-AC 24V/230V, Steca XPC 2200-24, inverter and charger
… see the photos and specification.
High power DC/AC inverters for off-grid applications
Introducing new products into for the DC solutions. The Steca XPC 2200-24 inverter is generating 230V AC power from 24V DC battery pack. Fully sine wave inverter for all kinds of applications.
Learn more at