ESS Wiki

An ESS is an Energy Storage System and its purpose is to store surplus energy, not used in your home, to re-use it later throughout the day or at night when solar generation is down; 

It can also store energy from wind, or any other generation mean, even from the grid itself: you can help shave peaks and save money charging at night when electricity is cheap, and discharging during the day when it is expensive

It is composed of a Wattson energy monitor, a LiFePO4 battery pack, several grid tie inverters, several chargers, a control board, cables.

The initial storage capacity of the ESS is 5kWh, charge power 550W (6 Chargers), discharge power 1760W (8 Grid Tie Inverters, GTI), but all these can be increased by increments of 5kWh, 92W, 220W, by doubling the number of CALB CA180FI cells, adding another charger, adding another GTI.

For example, you could build easily an ESS with a storage capacity of the ESS is 10kWh, charge power 1000W (11 chargers), discharge power 2640W (12 GTIs), with DC cables resized to handle more current. It is very flexible and can be adapted to your solar and/or wind generation, and home AC loads to cover.

The ESS Control Board is the central management unit of the system where the instrumentation, the controls are, where all cables come and go, and also where you can monitor the state of the battery pack.

It is composed of an Arduino board flashed with the program I developed, AC breakers, 2 Tyco Kilovac contactors, 16 relays, a switch, a pushbutton, connectors, wires, 24V to 5V DC-DC converter, a board, screws, and a plastic cover.

I built this one myself for less than 3,000 EUR, which much cheaper than other ESS of the same capacity on the market

No comments:

Post a Comment