Solar panels and battery - any real world reccomendations?

I've made a decision to swap out my GivEnergy kit (inverter/batteries) for Victron gear, as I want more from it now. If all goes to plan I'll be using the V2L from the new car in the generator 240AC input on the Victron inverter to power the house, so will have a 55/70kWh battery on tap most evening/nights. It''ll be great for when the solar isn't supplying what we need, and we can charge at the cheap rates over night. Would love more panels but I'd have to build a new roof for that! It's going to be supporting a house running on full electric, no gas/oil etc. so I feel this is the right move to make.
Did you have the uprated inverter installed in the end?


Last two days after the heat of Tuesday night and getting my battery down to 4% reserve i've not been able to get it up above 70% charge due to the cloud cover. Just about got me through the night, but have had to turn the AC off for the first time in 3 weeks today to ensure i've not pulled anything from the grid :D well I was out so it didn't matter, but suspect will be back to normal operations tomorrow. But another learning for the future to minimise any unneccesary pull.
 
Did you have the uprated inverter installed in the end?
Nope, it was due last month and was delayed which kind of made my decision easier. Plus I have a buyer for my kit already, and I am making more back than I spent, so I will only be outlaying for the extra kWh for the new batteries, the rest will be covered by the Giv sale.

Last two days after the heat of Tuesday night and getting my battery down to 4% reserve i've not been able to get it up above 70% charge due to the cloud cover. Just about got me through the night, but have had to turn the AC off for the first time in 3 weeks today to ensure i've not pulled anything from the grid :D well I was out so it didn't matter, but suspect will be back to normal operations tomorrow. But another learning for the future to minimise any unneccesary pull.

Having AC seems like a great idea, but I don't think I could justify it as I quite enjoy the heat. :)
 
Just had my first quote in:

Solar Panels
Jinko Solar Co., Ltd.
7.875 kW Total Solar Power
21 x 375 Watt Panels (JKM375M-6RL3-B)
6,480 kWh per year

Hybrid Inverter
GivEnergy
5
kW of Total Inverter Power
1 x GIV-HY5.0
Warranty
coverage of up to 5 years extendable to 10 years

Giv-Bat9.5
1 x Giv-Bat9.5
9.5kWh of Storage
10 Year Performance Warranty

£11,606

Not heard of those Jinko panels before and 375W seems low?

Yea looks pretty good.
 
I completed one recently and it wasnt something I recall being asked.

So if current one has an issue with it I guess I can just get it done, then switch to a new provider where they don't even ask about it.

Lying on an application is bad, but if it's not a question they ask me, and it was installed prior to switching to a new provider, I don't believe I am duty bound to inform the new one.

From my perspective this is one of the reasons I would go with an MCS accredited installer, if any problems arise in the future I'd have evidence to back up that I used a properly qualified installer and have the MCS certificate to confirm it.
 
I think the issue is if you have added panels and a system of notable value and you haven't adjusted your buildings insurance they may deem it to be underinsured and hence any claim could be knocked back (not cancelled but reduced pro rata to the new value of house vs previous value of house)

Thats why typically when you do anything of notable value you check with them that it will be reflected in your premium and insured values.

They are I believe typically buildings and not contents cover, but it could vary insurer by insurer so you would need to check your insurers details, even more of an issue if you have buildings and contents elsewhere (quite unusual now you aren't basically forced to take buildings from your mortgage provider)
 
Maybe it will be a criteria they start to ask in the future. As with any major electrical work this is why you get a competent person who is qualified to sign it off. If you can prove the works and keep the certs then the insurers have to stand over something. Are there any statistics to go by where domestic fires have been caused by solar installation equipment? I get the insurers try to get out of paying for anything if they can but sometimes you have to apply reason and justify the monthly fee is to actually insure the building..
 
All fair points chaps, I've asked the installer for whatever the home insurance people wanted, but that is mainly to satisfy their questions.

Hopefully can smooth it over and get my insurer on board without trying to charge me extra, will see!
 
Getting a taste of winter today, the first since my install went in, had an hour or so generating under 100W when it was really dark earlier, brightened up a bit now and up to 1.2kw, batteries have been keeping us going even during the day, but slowly topping them up and getting enough in them to last overnight.
 
Having a think about my solar fault, I don't think my cleaning aligns with the output dropping/string difference but......
I missed a few bits ok some panels, would the tigo optimisers pick this up as a shadow?!
I'm wondering whether to clean them again and get the missed bits and see how it goes, as I need to clean them better anyway!
 
I've decided to start my solar journey and have been busy getting some quotes over the last few days and I wondered what peoples thoughts are? I use about 3400kwh per year with a resonable amount being used during the day as I have two small children with the wife currently being on maternity leave and only working part time when at work. I work full time out of the house but am starting to do a bit more home working as well.

The quotes I've had are for the below, non include bird proofing but I've found a specialist company who will do this instead for £450 for me which I think is reasonable so all the quotes below dont include it.

Quote 1
12 * J.A. 370w Panels (4.44kW)
Solax 5.8kWh Battery
Solis 4Kw Hybrid Inverter
£10,455.14

Quote 2

12 * Trina 385w Panels (4.62kW)
Foxess LV 5.2kWh Battery
Solis 3.68Kw Hybrid Inverter
£10,200.00

Quote 3

This is E.On so the panels / inverter I dont specifically know, but its 12 panels coming out at 4.68Kw and a much smaller 2.6kWh battery.
£10,801.00


I think I've pretty much discounted the E.on quote with it being the most expensive and a tiny battery comapred to the others. My favourtie is probably quote 1 despite being slightly smaller panels and a smidge more expensive, I think the bigger battery and better inverter will be better for me but I'd be curious to know others thoughts.
 
So your panels will generate more than your inverter can handle?

Seems a bit inefficient, I bet it's 3.6 so they don't have to do the DNO paperwork. I'd avoid number 2 personally, these are different companies?
But also remember some do this to ensure maximum generation when it's too hot or towards the spring and autumn
 
Yep, correct, I think all of them are within the lower level of certification ot avoid having to deal with the DNO as you've mentioned. It does seem common to slightly oversize your panels versus your inverter as its an increadibly rare day when your panels will be running at 100% efficiency for any length of time, though its one of the reasons I dont like quote 2 as much as quote 1. With option 1 the only time my generation would exceed what the inverter can handle is when they are running beyond 90% efficiency and I imagine that will be a rare day!

You are correct all 3 are different companies.
 
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