Solar panels….?

[geocycle]

Naïve question: when I looked Eon didn’t want to provide a system where I used the actual electric I produced, it all went into grid and was discounted from the bill. The result was in the event of a power cut I’d have no independent power other than batteries. Is this the case with other installers you are discussing? Is that what the DC to AC inverter does?

 

[Deleted member 26715]

Naïve question: when I looked Eon didn’t want to provide a system where I used the actual electric I produced, it all went into grid and was discounted from the bill. The result was in the event of a power cut I’d have no independent power other than batteries. Is this the case with other installers you are discussing? Is that what the DC to AC inverter does?

In the event of a power cut apart from a single socket you'll lose power as the inverter needs to see 240v AC current to work, mad situation I know but that's the way they are built

 

[jowwy]

In the event of a power cut apart from a single socket you'll lose power as the inverter needs to see 240v AC current to work, mad situation I know but that's the way they are built

Hybrid inverters use power from the batteries, so can still run during a power cut……for a short period

 

[Deleted member 26715]

Hybrid inverters use power from the batteries, so can still run during a power cut……for a short period

Not from what I've been reading, most shut down when the AC fails, they will however feed just a single/double socket usual placed at the side. This is a safety feature otherwise the inverter would try to power the whole grid

 

[jowwy]

Not from what I've been reading, most shut down when the AC fails, they will however feed just a single/double socket usual placed at the side. This is a safety feature otherwise the inverter would try to power the whole grid

Ive got an inverter running down my shed with zero 240v feed…..maybe its Different with household and grid tied systems, but there are some out there that will work in a power cut

look at the ecoflow power system, also its only if your feeding back to the grid

 

[CXRAndy]

Not from what I've been reading, most shut down when the AC fails, they will however feed just a single/double socket usual placed at the side. This is a safety feature otherwise the inverter would try to power the whole grid

If you have a 6kW battery backup, then barring huge power demands, you should be able to keep the whole house running. the system should seamlessly switch to battery feed if there is a mains drop out. If the system does not do that, look at systems that do. The obvious one is Tesla. Tesla Powerwall compared to other of similar sized system is not expensive. They just use a bigger battery than most
Powerwall Specs https://www.tesla.com/en_gb/powerwall

• Energy Capacity
  13.5 kWh
  100% depth of discharge
  90% round trip efficiency
• Power
  7kW peak / 5kW continuous
  Quick backup transition
  Pure sine wave output
• Size and Weight
  L x W x D
  45.3" x 29.6" x 5.75"
  1150 mm x 753 mm x 147 mm
  251.3 lbs / 114 kg
• Installation
  Floor or wall mounted
  Indoor or outdoor
  Up to 10 Powerwalls---------------------This feature for power hungry properties
  -4°F to 122°F / -20°C to 50°C
  Water and dust resistance to IP67
• Certifications
  Meets local safety standards and regulations
• Warranty
  10 years

 

[Deleted member 26715]

Ive got an inverter running down my shed with zero 240v feed…..maybe its Different with household and grid tied systems, but there are some out there that will work in a power cut

look at the ecoflow power system, also its only if your feeding back to the grid

If you have a 6kW battery backup, then barring huge power demands, you should be able to keep the whole house running. the system should seamlessly switch to battery feed if there is a mains drop out. If the system does not do that, look at systems that do. The obvious one is Tesla. Tesla Powerwall compared to other of similar sized system is not expensive. They just use a bigger battery than most
Powerwall Specs https://www.tesla.com/en_gb/powerwall

• Energy Capacity
  13.5 kWh
  100% depth of discharge
  90% round trip efficiency
• Power
  7kW peak / 5kW continuous
  Quick backup transition
  Pure sine wave output
• Size and Weight
  L x W x D
  45.3" x 29.6" x 5.75"
  1150 mm x 753 mm x 147 mm
  251.3 lbs / 114 kg
• Installation
  Floor or wall mounted
  Indoor or outdoor
  Up to 10 Powerwalls---------------------This feature for power hungry properties
  -4°F to 122°F / -20°C to 50°C
  Water and dust resistance to IP67
• Certifications
  Meets local safety standards and regulations
• Warranty
  10 years

As said most do not if grid tied, which I think it pretty stupid, you would have thought all it was was an extra couple of relays that in the event of AC failure drops the connection & isolates the house. I understand the safety aspect that if you don't drop it you'd be trying to power the whole grid & flatten you battery in minutes if not seconds.

You are correct the Tesla does do it, but it's 50% more & currently an 18 month waiting list

 

[jowwy]

 

[Deleted member 26715]

Don't shoot the messenger I'm only going on what I have been advised by the installers & the FB groups, unless the inverter sees AC current it will not provide power to your consumer unit & will only provide power to the separate failback sockets.

I agree it's a ludicrous situation

 

[kipster]

It all depends on the inverter, mine can only provide to a socket through the addition of an auto transfer switch. Another inverter with a very similar part number provides full UPS functionality but that is a 3 phase inverter.

 

[t_rifles]

Tesla powerwall has provided a full backup solution to power the home and still charge from solar for sometime now and I think Solaredge may have a recent new solution approved for uk.

 

[CXRAndy]

It all depends on the inverter, mine can only provide to a socket through the addition of an auto transfer switch. Another inverter with a very similar part number provides full UPS functionality but that is a 3 phase inverter.

I've just been looking and most seem to provide ups via 3 phase- phew, just had the remaining meter on our property upgraded from single to 3 phase

 

[jowwy]

Don't shoot the messenger I'm only going on what I have been advised by the installers & the FB groups, unless the inverter sees AC current it will not provide power to your consumer unit & will only provide power to the separate failback sockets.

I agree it's a ludicrous situation

not shooting anyone, just provding you with more information, to make a more informed choice.

 

[Deleted member 26715]

not shooting anyone, just provding you with more information, to make a more informed choice.

Providing a link to the info would have been helpful: the only system which I know that acts as a UPS in the event of a power failure is as mentioned earlier the Tesla Powerwall, if this is not Tesla I would be interested in the link

 

[jowwy]

https://eu.ecoflow.com/products/smart-home-panel?variant=41989906301092

A smart home battery system Made specifically for the DELTA Pro ecosystem, the Smart Home Panel connects the DELTA Pro portable power station right to your home’s wiring.

Backup power for essential home appliances When the grid goes down, the Smart Home Panel instantly switches to battery backup mode using any connected DELTA Pro units. Your home will go on strong with up to 7200W of power and 25kWh of energy when properly equipped.