Home battery to grid connection

[Shippo57]

Hi, I'm new to the forum, advice needed please, I have purchased 2
3.5kw Pylontech batteries, and a Solis 3.6kw hybrid inverter, I know I can connect the inverter to the battery disconnect and the disconnect to the battery, I just wondered if a standard electrician could wire the inverter to my consumer unit? or do I need a solar installer to do it. PS I got a hybrid inverter so I can add solar panels as well. Thanks in advance...

 

[steptoe]

What's the point in having an inverter, a battery, and no solar panels,?
It makes absolutely no sense, how are you going to charge the batteries,?

 

[binky]

Hi, I'm new to the forum, advice needed please, I have purchased 2
3.5kw Pylontech batteries, and a Solis 3.6kw hybrid inverter, I know I can connect the inverter to the battery disconnect and the disconnect to the battery, I just wondered if a standard electrician could wire the inverter to my consumer unit? or do I need a solar installer to do it. PS I got a hybrid inverter so I can add solar panels as well. Thanks in advance...

Any decent electrician should be able to sort that out for you.

 

[binky]

What's the point in having an inverter, a battery, and no solar panels,?
It makes absolutely no sense, how are you going to charge the batteries,?

You can get tariffs like the old E7, so you can charge batteries on cheap off peak leccy. You can also, with a smart meter, get a half hour variable tariff. Your energy provider has some level of control of your battery, so again charges up on a cheap rate and releases leccy at peak demands, for which you get paid.

 

[Shippo57]

What's the point in having an inverter, a battery, and no solar panels,?
It makes absolutely no sense, how are you going to charge the batteries,?

Thanks for your input, I use 5000kw of electricity per year at the ridiculous price of 33p pkwh. Which is £1650.00 per year. I will charge the batteries off peak at 7.5p per kwh which is £375 per year. A saving of £1275. Total cost so far £3400. I have 2 more 3.5 kw batteries on pre order so a total spend of £5600. Pay back period just under 4 and a half years, makes absolute sense to me....

 

[Shippo57]

You can get tariffs like the old E7, so you can charge batteries on cheap off peak leccy. You can also, with a smart meter, get a half hour variable tariff. Your energy provider has some level of control of your battery, so again charges up on a cheap rate and releases leccy at peak demands, for which you get paid.

Hi Binky, thanks for your supportive comments. Obviously I did my sums b4 hand, I do intend to get solar, but as we plan to move house in a couple of years, batteries are fine for now...

 

[BorisJ]

Thanks for your input, I use 5000kw of electricity per year at the ridiculous price of 33p pkwh. Which is £1650.00 per year. I will charge the batteries off peak at 7.5p per kwh which is £375 per year. A saving of £1275. Total cost so far £3400. I have 2 more 3.5 kw batteries on pre order so a total spend of £5600. Pay back period just under 4 and a half years, makes absolute sense to me....

You won’t get as much out of the batteries as you put in. I think the in/out ratio is something like 70%. What will happen to the surplus battery power? Selling it back to the grid is a non starter at around 5p per kWh. At some time both batteries and inverter will need replacing. You need to rethink your payback time.

 

[binky]

You won’t get as much out of the batteries as you put in. I think the in/out ratio is something like 70%. What will happen to the surplus battery power? Selling it back to the grid is a non starter at around 5p per kWh. At some time both batteries and inverter will need replacing. You need to rethink your payback time.

You don't have to sell back to the grid. You can set it up to charge on off peak and release energy during the day.

 

[steptoe]

I still think it's a flawed idea financially,

 

[binky]

I still think it's a flawed idea financially,

it depends on what the energy providers will be offering in terms of tariffs. Unlike the FiT nothing is guaranteed, but half the point of the 'smart grid' is to make such things viable. We will have to wait and see if it really works out.

 

[Shippo57]

I still think it's a flawed idea financially,

You are entitled to think what you want @steptoe. The thing that matters, is what I think and I know it will save me money...

 

[Shippo57]

You don't have to sell back to the grid. You can set it up to charge on off peak and release energy during the day.

Yes this is my intention @binky

 

[glenns]

Thanks for your input, I use 5000kw of electricity per year at the ridiculous price of 33p pkwh. Which is £1650.00 per year. I will charge the batteries off peak at 7.5p per kwh which is £375 per year. A saving of £1275. Total cost so far £3400. I have 2 more 3.5 kw batteries on pre order so a total spend of £5600. Pay back period just under 4 and a half years, makes absolute sense to me....

I for one think it's a great idea... but then I'm planning the same, just waiting for all the parts to arrive. DNO have agreed and smart meter going in on the 25th

 

[Shippo57]

I for one think it's a great idea... but then I'm planning the same, just waiting for all the parts to arrive. DNO have agreed and smart meter going in on the 25th

Hi, yes its a good idea, hope all goes well for you