Does the Middle East war push up electricity prices? How to equip the 7KW charging pile control board with energy storage for peak shaving and valley filling?

The 7kW charging pile is equipped with energy storage, and the control board only needs to become an "obedient execution node", without the need to manage high-power energy on its own.

Three storage modes

• Integrated household light storage: photovoltaic+5-10kWh household storage+7kW pile share one wall. The inverter serves as the main brain, and the control board receives power limit commands through RS485. When there is sufficient photovoltaic power, it is charged directly, and the remaining electricity is stored in the battery. During high priced periods, it is disconnected from the grid.

• Community shared energy storage: 100kWh energy storage cabinet with multiple 7kW piles. EMS unified scheduling, control board running OCPP Smart Charging, peak energy storage discharge, valley power grid replenishment.

• V2H reverse discharge: When the vehicle is moving to store energy, it supplies power to the home in reverse during peak hours. Both the pile and the vehicle support bidirectional OBC, but currently there are few models available.

Change the control board in three places

• Hardware: Connect the energy storage inverter with RS485/CAN interface, measure the total incoming current of the household with CT transformer, and prevent pile, energy storage, and home appliance stacking tripping.

• Software: Built in time of use electricity price meter or real-time electricity price obtained from cloud EMS. Two core logics: CT detects that the household power is approaching the transformer capacity, immediately reducing the current or stopping the machine; Full power rush charging during off peak hours.

• Communication: Run OCPP to report power and SOC to the backend, and do Modbus slave to obey home EMS for those who do not run OCPP.

Example of Execution Logic

• European household photovoltaic 5kW, household storage 10kWh, 7kW piles.

• At noon, there was a surplus of 3kW of photovoltaic power, and the control board received instructions from the inverter to charge the pile lock 13A directly; During the peak electricity price in the evening, EMS issued a "no charging" policy, and the CP line remained at 12V, but the charging station did not engage; Late night valley electricity costs 0.1 euros/kWh, with a pile full power of 7kW to charge the car and synchronously replenish energy storage.

The advantage of 7kW

• Low power makes it flexible. A 10kWh household can store enough electricity to run a 7kW pile for 1.5 hours, just enough to cover commuting power supply.

• Single phase 220V is naturally matched with European household storage, and the control board modification only adds RS485 and CT, with a BOM increase of less than 50 yuan.

one-sentence summary

The charging station control board does not require energy management by itself. It only needs to be connected to an inverter via RS485, equipped with CT overload protection, and has a built-in electricity pricing strategy in the firmware. As an executable node of EMS, it can provide peak time yielding, valley time rush charging, and full power direct charging when there is sufficient photovoltaic power. The high electricity price fluctuations in the Middle East have precisely given this "low-power, high-frequency, automated" household light storage and charging solution an economic account.

The communication charging pile control board produced by Xincheng Technology is of high quality and good price. Welcome to inquire and purchase!