agree - they have a 3.68kw ‘limit’ for the assumed consent and inform option, but is that allowing up to 3.68kw export (or are they assuming some level of self consumption?). You should be able to have any home setup that is guaranteed to not exceed that level of export and still only be inform. Eg a 20kw pv and 5 powerwalls shouldn’t matter as long as its set to no more than 3.68kw export.
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Solar Panels UK - is it worth it?
- Thread starter jdwuk
- Start date
agree - they have a 3.68kw ‘limit’ for the assumed consent and inform option, but is that allowing up to 3.68kw export (or are they assuming some level of self consumption?). You should be able to have any home setup that is guaranteed to not exceed that level of export and still only be inform. Eg a 20kw pv and 5 powerwalls shouldn’t matter as long as its set to no more than 3.68kw export.
If it was me I'd rather have the capacity to use all, yes maybe only for limited months admittedly but that's just my opinion
phil4
Member
Isn't it quite common practice to "oversize" the PV array... ie. have say, 4.5kWh of solar panels, but only a 3.5kWh inverter... I think the logic is that a) the inverters can for short periods cope with more and b) solar panels almost never generate what they say on the tin... the peak output quoted is, like WLTP a figure only ever achieved in a lab in ideal conditions.
I'm perhaps over playing that... but I swear I'd read it... and indeed here's the first google result telling you why: Why Should You Oversize Your PV Array?
So yes, maybe they don't like dealing with the DNO (it's not just paperwork, there's also a significant delay), but also perhaps this is why.
I'm perhaps over playing that... but I swear I'd read it... and indeed here's the first google result telling you why: Why Should You Oversize Your PV Array?
So yes, maybe they don't like dealing with the DNO (it's not just paperwork, there's also a significant delay), but also perhaps this is why.
RedMod3
Member
Agree at 14:37 today, with our 4kW array, I'm generating 3.61kw with a 3.68 inverter and with my 1.5kW array I'm generating 1.21kW with a 1.5kW inverter; we aren't even at peak production yet.
Sixer
Member
I thought that on the two, maybe three months that I may go over 3.68 it would just clip to the battery i.e charge it. On those months I would charge the car more. I understand a £650 charge is applicable for DNO approval
RedMod3
Member
No DNO charge here, confirmed by my installer who has raised generation from 3.68 to 5.2kWhr net.
Check who your local one is as some don't charge I'm with Western Power and they currently are free.
Yachtsman
Member
More info on the 0% VAT from QrizB on another forum:
Bad news for DIYers, it seems the reduced rate of VAT only applies to installed products
I read it here:
Budget 2022
Bad news for DIYers, it seems the reduced rate of VAT only applies to installed products
I read it here:
Budget 2022
I agree with you. I was told that total potential generation of up to 15% over the rated Inverter limit was acceptable but more than that and it could damage the inverter. My roof isn't true South - more SSE and my 4.380 panel output into the 3.68 inverter would be within tolerance. All I know is that on reasonably sunny days my system is running at its max of 3.68Kw for hours.
RedMod3
Member
Hmm, my baseload is 1.2kW, plus an extra 1kW for our heat pump to keep us warm. We generated just 13k Wh today, very poor.
RedMod3
Member
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