Electrolyser Group Control

What We Control?

Enapter Electrolysers designed to be stackable. It is possible to have a group of electrolysers, and such setup requires a convenient way of managing the whole group start / stop and production rate.

Objective of Automation

Automatic control group of Enapter electrolysers they way it is one device.

Requirements

At least one electrolyser is needed. Public MQTT must be enabled and configured on Enapter Gateway.

Rule to Control Electrolysers Based on Required Power

local power_manager = electrolysers.power_manager({
    'D4416F63D6F029A6D88855F157E01CB9',
    '4D6DC302EA88E381A56C15A450F3EDFA',
})

local desired_power_usage = storage.public.read('electrolysers_power')
if desired_power_usage then
    power_manager:set_total_power(tonumber(desired_power_usage))
end

Setting Electrolyser Group Required Power

mosquitto_pub command-line tool from mosquitto MQTT broker package is used. In the example below, all electrolysers will start and the production rate which will maintain consumed power at 50000 Watt. If all electrolysers must be started at maximum production rate, big value like 100000000 can be used. In case all electrolysers must be stopped - 0 must be used.

mosquitto_pub -p 9883 -h 127.0.0.1 -u public -P password -t 'variables/v1/set/electrolysers_power' -m '{ "value": "50000" }'

Rule to Control Electrolysers Based on Required Production Rate

local power_manager = electrolysers.power_manager({
    'D4416F63D6F029A6D88855F157E01CB9',
    '4D6DC302EA88E381A56C15A450F3EDFA',
})

local target_production, err = storage.public.read('electrolysers_production')
if target_production then
    local max_power = 2400 -- W
    local max_production = 520 -- NL/h
    local desired_power_usage = target_production / max_production * max_power
    power_manager:set_total_power(desired_power_usage)
end

Setting Electrolyser Group Required Production Rate

mosquitto_pub command-line tool from mosquitto MQTT broker package is used. In the example below, all electrolysers will start and the production rate which will maintain the production rate at 70%.

mosquitto_pub -p 9883 -h 127.0.0.1 -u public -P password -t 'variables/v1/set/electrolysers_production' -m '{ "value": "70" }'