BI-DIRECTIONAL INTELLIGENT INVERTER (KBT SERIES: 1KW~30KW)

Features of Bi-Directional Inverter

  • In can export to grid the excess power when not in use once the batteries are charged.
  • Dual Core DSC with Integrated solution for continuously power interruption.
  • Pure digital control with high sampling technique ensures high performance.
  • Can program for grid-tie and Off-Grid operation both with storage batteries.
  • Can work as energy sharing with first priority preferences to solar, Utility, Battery & mix.
  • High efficiencies of > 97.2%.
  • Innovative BMS to extend battery life.
  • Built in with High efficiency MPPT module.

Features as follows

  • 1KW inverter with energy storage
  • Self-consumption and Feed-in to the grid
  • Programmable supply priority for PV, Battery or Grid
  • User-adjustable battery charging current suits different types of batteries
  • Programmable multiple operations modes: Grid tie, Off grid, and grid-tie with backup
  • Built-in Timer for various mode of on/off operation
  • Monitoring software for real time status display and control (optional)
MODES

There are three operation modes: Grid-tie with backup, Grid-Tie and Off-Grid.

Grid-tie with backup

  • PV power can feed-in back to grid, provide power to the load and charge battery.
  • There are four options available in this mode: Grid-tie with backup I, II,IIIandIV. In this mode, users can configure PV power supply priority, charging source priority and load supply source priority.
  • However, when Grid-tie with backup IV option is selected in PV energy supply priority, the inverter is only operated between two working logics based on defined peak time and off-peak time of electricity.
  • Only peak time and off-peak time of electricity are able to set up for optimized electricity usage.

Grid-Tie

  • Grid-Tied systems use PV panels to generate DC power.
  • The DC power goes to a grid interactive (grid-tied) inverter which converts the PV panel DC power to 240 volt AC power that is compatible with the power grid.
  • The power from the PV panels goes (via the grid tie inverter) to supply the household power needs.
  • If the PV system is generating more power than the house can use, the excess is sent out over the grid to supply others.
  • If the house needs more power than the PV system can supply, then the extra is drawn from the grid as usual.

Off-Grid

  • Off-Grid systems are independent of the utility power grid.
  • They generate electricity, store it, and make it available for use without any connection to the power grid.
  • Off-Grid systems use PV panels connected to a Charge Controller to charge a set of batteries.
  • The stored energy from the batteries is usually converted to regular 120 volt, AC power by an inverter.
  • But, some small systems just use the DC power directly from the batteries.
  • Can save significantly on initial cost if a long grid extension is needed to get to your house.

(A) Grid-tie with backup: This inverter is connected to grid and working with DC/INV operation

This inverter is activated to generate power to the loads via AC output. PV power is sufficient to charge battery, provide power to loads, and excess power is feed back to utility.

This inverter is disabled to generate power to the loads via AC output connector. PV power and utility are charging battery at the same time.

This inverter is activated to generate power to the loads via AC output connector. PV power is low will charge the battery. At the same time, PV power will deliver power to the utility and balance power will be shared with utility.

This inverter is disabled to generate power to the loads via AC output connector. PV power is feeding power back to the utility. No battery is connected or battery is not available to use at this moment.

This inverter is activated to generate power to the loads via AC output connector. PV power is generated, but not sufficient enough to charge battery by itself.
PV power and the utility are charging battery at the same time. And the utility is also supplying power to the connected load.

This inverter is activated to generate power to the loads via AC output connector. PV power is sufficient to charge battery, provide power to loads, and feed power back to utility.
No battery is connected or battery is not available to use at this moment.

When load is not connected or zero, This inverter is disabled to generate power to the loads via AC output connector. PV power is sufficient to charge battery and feed power back to grid.

This inverter is activated to generate power to the loads via AC output connector. PV power and utility are providing power to the connected loads. No battery is connected or battery is not available to use at this moment.

(B) Inverter mode: This inverter is working with DC/INV operation and not connecting to the grid.

This inverter is activated to generate power to the loads via AC output connector. At the same time, the utility is out of range. PV power is sufficient to charge battery and provide power to the connected loads.

This inverter is activated to generate power to the loads via AC output connector. At the same time, the utility is out of range. PV power is generated, but not sufficient enough to power loads by itself. PV power and battery are providing power to the connected loads at the same time.

This inverter is activated to generate power to the loads via AC output connector. At the same time, the utility is out of range. PV power is not detected or available at this moment. Only battery power is available to provide power to connected loads.

This inverter is activated to generate power to the loads via AC output connector. At the same time, the utility is out of range. No battery is connected or battery is not available to use at this moment. Only PV power is available to provide power to connected loads.

(C) Bypass mode: The inverter is working without DC/INV operation and connecting to the loads.

This inverter is activated to generate power to the loads via AC output connector. At the same time, PV power is not detected or available. Only utility is charging battery and providing power to connected loads.

Inverter fault occurs. But this inverter is activated to generate power to the loads via AC output connector. PV power is charging battery and the utility is providing power to the connected loads.

This inverter is activated to generate power to the loads via AC output connector. PV power and battery are not detected or available to use at this moment. Only utility is available to provide power to connected loads.

(D) Standby mode:The inverter is working without DC/INV operation and connecting to the loads.

The utility is out of range. This inverter is disabled on AC power output or even AC power output is enabled, but an error occurs on AC output. Only PV power is sufficient to charge battery.

This inverter is disabled to generate power to the loads via AC output connector. PV power is not detected or available at this moment. Only utility is available to charge battery.

This inverter is disabled to generate power to the loads via AC output connector. PV power and the utility are not detected or available at this moment.

Schematic for 10KW Three phase Inverter