Hello dear members,
We are planning to install a photovoltaic system and currently have two offers shortlisted.
We have a newly built house (2020) with a hip roof and want to cover the south/west and east sides.
Approximately 7.5 kWp can fit on our roof, and we are considering a 10 kWh (10 kWh) battery storage.
One offer includes Sharp modules and an Ecoflow Power Ocean Kit (inverter with battery), and the other includes Axsun modules, a Fronius inverter, and the new Fronius Reserva battery.
Since the second offer is almost 3000 euros more expensive, we are leaning towards the first one.
We have only read positive things about the Ecoflow storage so far. However, it has only been on the market for a short time. Fronius has been around much longer and is reputedly very reliable.
We wanted to ask here if anyone has the Ecoflow system and how satisfied you are with it?
We are planning to install a photovoltaic system and currently have two offers shortlisted.
We have a newly built house (2020) with a hip roof and want to cover the south/west and east sides.
Approximately 7.5 kWp can fit on our roof, and we are considering a 10 kWh (10 kWh) battery storage.
One offer includes Sharp modules and an Ecoflow Power Ocean Kit (inverter with battery), and the other includes Axsun modules, a Fronius inverter, and the new Fronius Reserva battery.
Since the second offer is almost 3000 euros more expensive, we are leaning towards the first one.
We have only read positive things about the Ecoflow storage so far. However, it has only been on the market for a short time. Fronius has been around much longer and is reputedly very reliable.
We wanted to ask here if anyone has the Ecoflow system and how satisfied you are with it?
B
Bierwächter22 May 2025 01:23The last thing I am honestly interested in when it comes to photovoltaic systems is power outage resilience.
M
motorradsilke22 May 2025 06:18nordanney schrieb:
I'm not getting any younger either, but I can't recall a power outage lasting more than 5 minutes.
For me, the equipment that I can use 24/7/365—and do use—is worth every penny.
The world is just that different. It would be great if both could be combined. In other words, when bidirectional charging finally arrives, you could save yourself the cost of an additional storage system. It’s quite illogical to install another battery storage indoors when there’s a sufficiently large system right outside your door. And all of this just because policymakers haven’t gotten their act together.
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nordanney22 May 2025 07:42motorradsilke schrieb:
It would be great if both could be combined. In other words, when bidirectional charging finally arrives.My car, which I will receive next Wednesday, can do that. I just don’t have a suitable wallbox (there is only one supplier). Also, I can’t use it additionally because my employer pays for the electricity charged at home.M
motorradsilke22 May 2025 08:38nordanney schrieb:
I can get my car next Wednesday. I just don’t have a suitable wallbox (there is only one provider). And I can’t use it anyway, since my employer pays for the electricity charged at home. There seem to be more suitable wallboxes available, according to Google.
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nordanney22 May 2025 09:03motorradsilke schrieb:
There are probably more suitable wallboxes, according to Google.Only one that properly communicates with and is approved by VW. But as I said, I am not allowed to use it anyway.
Hello,
I used to think the same:
Besides the obvious sluggishness of German politics (the main issue currently seems to be that the authorities don’t know how to handle the case of “someone allowed to charge their car at work for free and then uses their employer’s free electricity at home” from a tax perspective), the problem is also technically not trivial.
Unlike an internal home battery, your wallbox is not connected to your inverters but directly to the power line. In other words, if you want to supply your house through the wallbox, you first need to properly disconnect from the grid. Otherwise, you would feed the charge from your car’s battery into the public grid and find yourself with an empty car battery in the morning.
And here you face the same challenges as with implementing an off-grid solution. Automatic switching, seamless transition… it’s not easy.
Best regards,
Andreas
I used to think the same:
motorradsilke schrieb:
It seems so illogical to build an additional battery storage in the house when there is already a sufficiently large storage right outside.
Besides the obvious sluggishness of German politics (the main issue currently seems to be that the authorities don’t know how to handle the case of “someone allowed to charge their car at work for free and then uses their employer’s free electricity at home” from a tax perspective), the problem is also technically not trivial.
Unlike an internal home battery, your wallbox is not connected to your inverters but directly to the power line. In other words, if you want to supply your house through the wallbox, you first need to properly disconnect from the grid. Otherwise, you would feed the charge from your car’s battery into the public grid and find yourself with an empty car battery in the morning.
And here you face the same challenges as with implementing an off-grid solution. Automatic switching, seamless transition… it’s not easy.
Best regards,
Andreas
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