Hello everyone,
Yesterday, quite by chance, I watched a YouTube video where someone reviewed their past year with a photovoltaic system and its battery storage. Since I don’t know much about this, and the guy was using exactly the hybrid inverter we are planning to get (KOSTAL PLENTICORE plus), I watched the whole thing.
One detail stood out to me, which he was quite frustrated about because he hadn’t paid attention to it when buying. It was about the maximum charge/discharge current at the battery input. He mentioned that while he made sure the battery itself had a relatively high limit (I think it was 25A), he overlooked the fact that the inverter has only 13A.
I didn’t fully follow his explanation, but he described the problem as the low current limit of the inverter restricting the battery’s output, which means that only about 2.6 kW instead of 5 kW can actually be delivered. This, he said, might lead to situations where if the washing machine and dishwasher run at the same time, grid power would have to be drawn.
This got me thinking, and I searched online for keywords like “what to consider when buying an inverter” and so on. I also skimmed through some forum threads but couldn’t find any advice highlighting this particular specification anywhere.
Am I fundamentally misunderstanding something?
Could someone here explain exactly what this is about? And are there other specs one should pay attention to as well?
I can well imagine that in our case, loads like this will be drawn quite often, and I would be annoyed if such a small detail caused unnecessary grid power consumption.
Best regards
Yesterday, quite by chance, I watched a YouTube video where someone reviewed their past year with a photovoltaic system and its battery storage. Since I don’t know much about this, and the guy was using exactly the hybrid inverter we are planning to get (KOSTAL PLENTICORE plus), I watched the whole thing.
One detail stood out to me, which he was quite frustrated about because he hadn’t paid attention to it when buying. It was about the maximum charge/discharge current at the battery input. He mentioned that while he made sure the battery itself had a relatively high limit (I think it was 25A), he overlooked the fact that the inverter has only 13A.
I didn’t fully follow his explanation, but he described the problem as the low current limit of the inverter restricting the battery’s output, which means that only about 2.6 kW instead of 5 kW can actually be delivered. This, he said, might lead to situations where if the washing machine and dishwasher run at the same time, grid power would have to be drawn.
This got me thinking, and I searched online for keywords like “what to consider when buying an inverter” and so on. I also skimmed through some forum threads but couldn’t find any advice highlighting this particular specification anywhere.
Am I fundamentally misunderstanding something?
Could someone here explain exactly what this is about? And are there other specs one should pay attention to as well?
I can well imagine that in our case, loads like this will be drawn quite often, and I would be annoyed if such a small detail caused unnecessary grid power consumption.
Best regards
D
Daniel-Sp25 Aug 2022 11:08Search online for "voltage meters," and you will also find a list of which electricity meters support this function. However, you would need a Raspberry Pi or a similar device. These are not exactly easy to come by at the moment either...
Quick question regarding your suggestion to run appliances programmed during the day because of the photovoltaic system… I feel uncomfortable running the washing machine or dishwasher when I’m not at home.
Shortly after moving in, the washing machine broke down… it has a water stop system and everything… but after the drip tray developed a crack, it kept pumping water continuously, which it probably would have done for several more hours if I hadn’t been home.
Shortly after moving in, the washing machine broke down… it has a water stop system and everything… but after the drip tray developed a crack, it kept pumping water continuously, which it probably would have done for several more hours if I hadn’t been home.
W
WilderSueden25 Aug 2022 13:16Snowy36 schrieb:
Quick question about your suggestion to program the appliances to run during the day because of the photovoltaic system... I feel uneasy running the washing machine or dishwasher when I'm not at home...Home office for the win If you feel uneasy, you simply shouldn’t run them when you’re away
So, our hybrid inverter/storage system can deliver up to 3.75 kWh. I have a 7.5 kW storage installed.
This is sufficient in most cases. Mainly, I want to use it to cover nighttime power supply. That works very well.
If cooking and washing are done in the evening, the grid consumption is usually only for a short time. Then the inverter stabilizes and draws from the storage.
This is sufficient in most cases. Mainly, I want to use it to cover nighttime power supply. That works very well.
If cooking and washing are done in the evening, the grid consumption is usually only for a short time. Then the inverter stabilizes and draws from the storage.
Daniel-Sp schrieb:
Search online for “Volkzähler,” and you’ll find a list of electricity meters that support this.
However, you would need a Raspberry Pi or something similar. They’re not exactly easy to get at the moment... Thanks for the tip, I’ll take a look. Luckily, I managed to get two Raspberry Pis before the crisis (Ukraine, not COVID). They were even part of a deal back then. One was supposed to be used for Shelley and the other for the UniFi Controller software. One of them should still have enough capacity for simple measuring and logging.
I just don’t know much about all this yet and planned to learn more after the construction phase. So I’ll probably only get to it in 2023... 🙄
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