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Inverters for grid connection Together with their range of accessories, the SES Grid inverters represent an innovative family inverter solutions for grid-connected solar power systems. With a combination of the highest possible performance, ease of use and maximum flexibility, SES offers a range of modular components that you can combine to suit your requirements – solutions from 300 W to several 10,000 W. This combination of an enormous range of system sizes, a modular concept and a wide range of accessories offers you over 100 different possibilities for designing an inverter system tailored to your individual needs. Maximum flexibility for maximum results.
	legende: A Generator B Inverter C Electricity meter for injection D House connection point E Public electricity network F Electricity meter for consumption G Consumer load
	Example for configuration of a 4,4 kWp system: Module type: 185 Wp ( Umpp = 36,0 V; Impp = 5,1 A) Module quantity: 24 Inverter: SESGrid 2000+ Anzahl Wechselrichter: 1 Master, 1 Slave Modules per inverter: 2 x 6 Installed nominal power: 4,4 kWp (DC)
solar home systems with SES solar charge controllers. A solar home system consists of a SES solar charge controller, one or more solar modules, a battery and the connected loads. The solar charge controller is connected directly to the battery using as short a cable as possible, and fixed to the wall near to the battery, so that it can be effectively cooled by the passing air flow.
	Caption: A Generator B Solar Charge Controller C Battery D Generator connection box E Current Consumer (12 V-) F Boiler G Storage tank
In principle, the battery is always connected to the charge controller first. Then the solar module field is connected to the solar module input of the charge controller. Only direct current loads are used in solar home systems. They are connected directly to the load output of the charge controller. This means the SES solar charge controllers always show the exact charge status of the battery, and thus ensure optimal battery maintenance in all situations. Various SES energy saving lights, SES solar cooling units, DC-to-DC converters and other appliances can be used. The SES solar charge controllers control the energy flow of the entire system. They make sure that the solar module charges the battery quickly and effectively, but they also protect the battery against overcharging. If the loadss discharge the battery, the charge controller, thanks to its precision in calculating the charge status, switches off the load at exactly the right moment, thus protecting the battery from the dangers of deep discharge.
	Furthermore, SES charge controllers are equipped with an intelligent battery monitoring system. The most effective charging method is selected according to the requirements of the batteries. The charge controller is the central controlling component in solar home systems, since it affects all the functions of the system. For this reason, it is important to choose a reliable and high-performance charge controller.
PV battery systems with SES inverters. In contrast to solar home systems, stand-alone systems are equipped with an extra inverter. This extra inverter changes the direct current of the battery into alternating current. This means that any common AC appliances can be used - just like with the public grid. However, DC appliances can also be connected to the output of the charge controller. The inverter is connected directly to the battery, using a cable which is as short and as fat as possible. An AC system can be created with a system voltage or battery voltage of 12 V, and also with 24 V or 48 V for greater capacities. The simple system concept makes installation quick and easy.
	legend: A Generator B Solar charge controller C Battery D Inverter E Generator clamps F Current consumer (230 V-)
Three-phase hybrid system concept The control concept is similar to that of the single phase system. If more than one Tarom/Power Tarom is employed, one of the devices must be designated as the master Tarom. All other charge controllers are then automatically designated as slave Taroms. The master Tarom/Power Tarom is connected directly to the battery, whilst all slaves are connected to the DC bus. Only the master Tarom/Power Tarom shows the correct charge status on its display and controls the energy flow around the system. Slave Taroms/Power Taroms perform the function of controlling the charging from the connected PV modules. In order to assemble a three-phase energy supply, three inverters are connected to the DC bus. For this, the inverters must be specially designed in order to allow three-phase operation. Various three-phase generators can be connected to the three inverters for controlled recharging of the battery via a PA15 and a relay. These may be wind, water, or diesel generators; or the public grid. Suitable inverters with integrated battery chargers in three-phase mode are the SES Xtender devices, which can be employed from 12 V/3 kW to 48 V/24 kW per phase. In total, a maximum of 72 kW can be supplied. Both single-phase and three-phase hybrid system concepts are based on the same principles of energy management. With the help of the SES PA HS200 current sensor, the charge and discharge currents of the components, such as slave Taroms/Power Taroms, inverters etc., are determined and communicated to the master Tarom/Power Tarom. Based on the calculated charge status of the battery, the SES PA15 switches the extra generator on or off. The three single-phase inverters switch off if the voltage falls below a given threshold in order to protect the battery from deep discharge.
	Important features Combination of different power sources like PV, wind, diesel generators etc. 24 h / d full 3 phase 400 V~ and single phase 230 V~ power supply 12 V / 24 V or 48 V overall DC-bus Automatic energy management regulation based on the State of Charge of the battery. Including automatic start of controllable power sources like e. g. diesel generators Optimised battery charging algorithm
SES solsafe Blackout - and yet it stays light! Large-scale power supply failures are becoming increasingly common. With emergency systems such as generators or uninterruptible power supplies (UPS), the power supply can be assured for a certain time. Yet, in the event of a power outage, the grid-connected PV system also stops working. This means that although power may be available, it cannot be used. The SOLSAFE system offers a simple, efficient and cost-effective solution to this problem. Installing one of our combined inverters SES XPC, Compact, HPC, or Xtender with the supplementary ARM-01 module and a battery system turns any grid-connected PV system into an emergency power supply in the event of a power outage. If the public grid is available, the electrical output generated by the solar modules is fed directly into the grid by the SESGrid grid inverter (B) and the feed meter (D). In parallel to this, the unsupplied loads (H) receive power directly from the grid, via the consumption meter (E). The batteries are kept fully charged from the public grid via the SES hybrid inverter system (F), and, if necessary, they are recharged. Furthermore, the supplied loads (G) receive power from the public grid during transfer mode. If there is a grid outage, the SES hybrid inverter system automatically switches mode to operate as a stand-alone inverter, and continues to feed power to the supplied loads (G) without any interruption. Because the SESGrid grid-feed inverter can no longer supply power to the grid, its output is channelled directly to the supplied loads (G) by the ARM-01 switch (C). In this way, the loads can receive power directly from the grid inverter of the solar modules. At the same time, the battery can be recharged with the available solar energy, which increases the length of time for which the supplied loads can receive power during the night. With this set-up, the capacity of the battery can be kept small, allowing for an optimal design of system costs. The SOLSAFE system is fully automatic, and can be integrated into any new or existing PV system.
	legend: A Solar modules B Grid-connected inverter SESGrid 2000+ C ARM-01 option D Grid-feed electricity meter Consumption electricity meter F SES XPC, SES HPC or SES Compact stand-alone inverter G Supplied loads H Unsupplied loads
Communication with Tarom charge controllers A further innovation that has gone into the Solarix PI is the communication with the solar charge controllers from the SES Tarom and PowerTarom series. A data connection to the charge controller can be created via the PAx4. In this case, the inverter connected directly to the battery communicates the amount of energy that has been withdrawn to the solar charge controller. The controller is thus able to calculate the correct state of charge (SOC). This means that these systems no longer need to be switched to voltage-controlled operation or an additional current shunt. If the switch-off threshold of 30 % SOC is reached, the Solarix PI receives a signal from the solar charge controller and subsequently switches itself off in order to protect the battery from deep discharge. It turns itself back on again once the SOC has reached the 50 % mark.
	legend: A Generator B Solar charge controller C Battery D Sinus wave inverter SES Solarix PI E Inverter connection box F Generator connection box G Load (230 V-)