I want to test the maximum load that this inverter can withstand on a single phase while operating in off-grid mode.
I will disconnect the inverter's power supply using a circuit breaker. Additionally, I have installed an ammeter to see how much current will flow from the energy storage, as the inverter will also draw energy from the photovoltaic modules. To appropriately load the phase, I need to connect an electric car charger. This charger has an interesting feature - you can set the maximum charging power. I've set it to the maximum, which is sixteen amps. In the Fossibot energy storage, I can also set the maximum power it will draw from the grid. The final energy recipient is an electric heater. Everything is metered. The circuit breaker is twenty-five amps. I hope it will hold. I'm cutting off the power. We can see that the inverter is in off-grid mode. Twenty-one amps are being drawn from one energy storage. The meter can measure up to a maximum of forty amps, which is why I connected it to only one storage.
I will turn on the heater at its maximum power. The heater consumes one thousand seven hundred seventy-three watts. The car charger draws two thousand eight hundred watts. Fossibot consumes four hundred thirty-two watts. In total, five thousand four hundred watts are being consumed on just one phase.
Let's see what information the Deye inverter displays. The photovoltaic modules provide one point seven kilowatts, four point six kilowatts come from the energy storage, and the energy consumption is almost six kilowatts.
More than forty amps are being drawn from the energy storage, and the meter is already beyond its scale.
and the inverter has turned off at this point. Overload. We now know the maximum load that the Deye inverter can handle on a single phase.
I will repeat this experiment, but this time I will distribute the load across two phases.
The inverter turned on by itself after thirty seconds.
I know that the inverter is capable of delivering up to ten kilowatts in total, whether on two or three phases. I won't be testing this anymore. I will reconnect the power supply. We're still off-grid, as the inverter waits for sixty seconds before switching from off-grid mode to on-grid mode. This is the output from the inverter. There is voltage in this wire all the time. The inverter restores power from its own generator within a very short time, up to ten milliseconds, after an external power outage. You saw this in my previous video. I showed that this is such a short time that even a computer doesn't freeze. We're drawing fifteen amps from the energy storage because the sun is out, and a lot of energy is coming directly from the solar panels. The batteries are only supplementing the missing power. The sun has set, and the power consumption from the energy storage has immediately increased. We are now in the normal on-grid mode. We're getting two kilowatts from the rooftop panels. We have over seven kilowatts from the energy storage. In the case of our experiment, the three energy consumers in the house are drawing a total of nine kilowatts. The inverter is drawing only twenty watts from the grid.
I'm turning off the power now. We'll see how the inverter behaves when there is a power outage with such a high load. I'm turning off the circuit breaker, and I will show you what the wattmeter indicates during this time with the highest energy consumer.
If you experience power outages in your home, both short ones lasting a few seconds and longer ones lasting several hours, it's worth considering the purchase of a hybrid inverter and powering your entire home through its off-grid output. The inverter becomes an even more powerful device. As you could see in the example of the Deye inverter I have, it can deliver only five kilowatts of power on a single phase and ten kilowatts in total. Rarely does a home have higher energy consumption. Of course, there are inverters with higher power capacities, such as twelve kilowatts. Any surplus energy from the PV modules, as soon as the inverter is connected to the grid, will be redirected, unless you set it to zero export mode to the grid. In the case of the Deye inverter, you don't need to install an additional energy meter. Just install current transformers in the distribution board, and connect the wires from them directly to the corresponding outputs on the inverter.
Here's how the data collected by the inverter during my experiment looks. Green represents the battery power consumption. At its peak, it was over seven kilowatts. Red indicates energy consumption by the consumers. The peak here was as high as nine kilowatts. Blue shows the energy production from the photovoltaic panels. At this time of day, it was only two kilowatts two. By the end of the day, we managed to store a bit more energy in the battery.
Please let me know what other experiments interest you. What should I test on this inverter? Perhaps its compatibility with a generator?

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