If that's really what an installer said, find yourself a new installer.He said I wouldn't need a battery as they only hold 50cent worth of electricity anyway.
Yeah that's not great! The number of cents the battery can hold isn't the figure you're interested in, it's the throughput over a time period that matters. That €0.50 could charge/discharge ten times a day and your saving would be €5 that day.If that's really what an installer said, find yourself a new installer.
If you are going down the route of an electric car get them to wire for the charger when doing this as it needs to be connected to the same system as panels, inverter as well as the fuse board. They will be doing all that anyway for panels and inverter.Thanks for all the replies. Sounds like getting a battery is probably better overall for night time use. Down the line we might have an electric car so than can take the excess generated when the battery starts to lose power.
For reference I have a 5kWh battery in-place for 2 years now and the throughput has been about 4.5MWh. So the battery has helped me use an extra €450 of my generated solar (4500/2 * €0.20/kWh). The battery cost something like €3k after the grant, so it would take 13 years to break even at this rate.
You're assuming 100% efficiency in the charge / discharge cycle and inverter there!Saving €0.15/kWh * 5 KWh per day = .75 per day or about 70 euro over the 3 winter months. Reducing your payback period to less than 6 years.
To go back to the OP's post:I've got 2 quotes for Solar panels and the first quoted for 10 panels with an immersion diverter at a cost of €9,100 before grant (€7,300 after) generating 3.95kWp.
He said I wouldn't need a battery as they only hold 50cent worth of electricity anyway.
2nd quote was for 12 panels 4kWp at a cost of €11,800 before grant, €8,800 after. This quote included battery and immersion diverter. This Company felt the battery was more important than the immersion switch.
2nd quote seems better but is who is correct? Also how long does a battery last. Are they like phone batteries that need replacing every 2 years?
Any more than 12sqm of panels will require planning permission, but there is some precedents where people were allowed more. If it's the feed-in tariffs that interest you, the capacity of the inbound connection will limit output. The standard domestic supply is 12kVA here.What is the max PV capacity / output you can install on a private house? Is there a limit? Thanks.
Any more than 12sqm of panels will require planning permission, but there is some precedents where people were allowed more. If it's the feed-in tariffs that interest you, the capacity of the inbound connection will limit output. The standard domestic supply is 12kVA here.
Yeah, I wouldn't rely on a supplier's view of planning legislation, but I can only see the current limits being expanded.Some additional info here: https://energyd.ie/solar-panels-and-planning-permission-in-ireland/
But the recent Bord Plenanla decision (details in the link) may have changed the ground rules.
If it's the feed-in tariffs that interest you, the capacity of the inbound connection will limit output. The standard domestic supply is 12kVA here.
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