Negotiated:

x12 Aiko-A475w.

x2 Sunsynk 5.32kWh Baterries.

x1 Sunsynk 5kW Inverter.

Total Cost £7850. Bird netting included. I just wondered how this stacks up against the market and other quotes?

Hello!

We're new to solar and looking for some thoughts on three quotes we've received - they're all very similar total amounts, but the cost breakdown seems to focus on different things, so we'd love any thoughts on which you think looks best (or any red flags you see!). We had a 12 kWh ASHP installed last October, and live in a fairly exposed detached house in Scotland, so we get through a lot of kWh, especially in winter!

Region - East Scotland

Yearly kWh - around 12,000 kWh

Tariff - Currently on Octopus Cosy, but open to changing if another tariff works better with a solar/battery set up.

All three quotes have suggested installing panels on both sides of the house (faces east-west), and on our external double garage (which faces north-south) - so this presumably means 3 lots of scaffolding.

Quote 1:

12.15 kW PV System

- 27x Trina Vertex S+ 450W Dual Glass Full Black N-Type Mono (split across 3 arrays of 8 × 450W, 5 × 450W & 14 × 450W panels)

- Inverter: 1 × Sigenergy Sigenstor 10kW 1ph Hybrid

- Batteries: 3x Sigenergy 8.76kWh Battery (Giving 26.3 kWh usable battery storage)

- Sigenergy Back up gateway

Predicted annual generation: 9,887 kWh per year

Cost:

£16,519.72 equipment

£4400 installation (including scaffolding)

Total - £20,919.72

Quote 2: (Worth mentioning - the only installer who has done an in person survey/quotation and it seems the most conservative in terms of output, so maybe the most realistic?)

12.60 kW PV System

- 28x Trina Vertex S+ 450W Dual Glass Full Black N-Type Mono (Traceable) (split across 3 arrays of 6 × 450W, 6 × 450W & 16 ×

450W panels)

- Inverter: Fox ESS KH 9kW 1ph Hybrid Inverter

- Batteries: Fox ESS CQ7 7.02kWh Battery - 1 x master and 3 x slave batteries, total 28.1 kWh battery storage

- Fox ESS EPS 1ph Backup Box

Predicted annual generation: 7,145 kWh per year

Cost:

£11,712.94 equipment

£9300 installation (including scaffolding)

Total - £21,012.94

Quote 3:

10.78 kWp total array

- 22 x Aiko S3 490W All Black solar panels (Array split across 3 roofs: 16 panels to the main tiled roofs and 6 panels to the metal roof)

- Inverter: Sigenergy EC 10kW single phase Energy Controller

- Batteries: 3x Sigenergy SigenStor - 27.12 kWh battery storage

- Sigenergy Backup Gateway

- Bird proofing to the tiled roof array

- Optional extra: upgrade the inverter to a 12kw for an additional £110.

Predicted annual generation: 8,300 kWh per year

Cost:

Total, supplied and installed: £20,720

It is my understanding that we would additionally have to pay for a G99 application on top of these quotes - one company mentioned it would be between £250-£600.

Any insight into the chosen gear, prices or any concerns with the above would be very much appreciated! Thanks in advance

Hi, I have this quote for a new system at my home, could someone review it?

14 x Hengdian Group DMEGC Magnetics 460 Watt Panels (DM460G12RT-B48HBT) 1 x KH8 (Fox ESS) 2 x EP12 Plus (Fox ESS) 7 x TS4-A-O, 1 x EPS BOX-SP Total System Price £13,000.00

In addition, my house has a fairly shaded roof, and the installers are brushing off my concerns about the impact this will have.

They said that if shading issues do arise, "optimisers will be added to all the panels to negate it." and that they are "micro inverters attached to each panel." + "If optimisers are needed they are included in the price." Nothing appears in writing on the quote about this.

How much BullSh!t is that?

NB:This is prior to a full survey, which is happening next week.

Just installed a 6kW inverter 18kWh battery (sig) export limited to 5kW. Total of 5.5kWp solar (3.5 from old FIT panels and 2 just installed).

15kW heat pump getting installed on Monday.

Heat loss calculations suggest that my total annual electricity bill for heat pump (including hot water) will be 7500kWh. This would vary across the year so maybe 4-8kWh per day in summer for hot water, 15-20 in spring/autumn, 37 in winter. Could hit 70kWh on a very cold day (seasonal breakdown is courtesy of AI so take with salt).

Existing usage 3200kWh pa.

Predicted generation 4400kWh pa

So I'm going to have to buy 6300kWh. If I can use battery and careful choice of tariffs to cut my unit price in half, I end up with the same electricity costs and no gas costs so a significant saving.

In summer I'd get some outgoing income as well but my focus is very much on buying as little a possible rather than exporting.

Currently paying 25.22/kWh on flexible octopus.

Cosy variable gives me 12.5p for three periods a day, and if above correct I will need three battery loads on those very cold days.

Seems a no brainer. Could potentially use flux in summer for better outgoing rates but I think I've missed this year's sunshine, thanks to Northern powergrid.

Are my sums right? Have I missed any tariffs? As far as I can see cosy is the only one with three low price periods and also has the lowest unit price?

We have a barn conversion with a ground source heat pump and high electricity usage. We are planning on getting aircon and EV, so expect our usage to go even higher. Current around 7500-8000kwh per year.

To make matters more complex we have 3 phase but only a single phase is used for the house and GSHP and another phase goes to outbuilding where ev charger would be.

So in theory I either change everything to 3 phase which is expensive and my GSHP might not be comparable. Or I stick with single and accept the solar and battery services the house but the ev would be overnight tarrif charging only. But this might be risky in the future if my house electricity exceeds what a single phase input can draw.

- edit - my GSHP can’t be on 3 phase so would need to replace it which I wouldn’t want to. So does rule out 3 phase a bit unless there is another option

This means I couldn’t charge ev from solar on a nice warm day.

My winter usage is around 45kwh on a bad day, and I wouldn’t expect to generate much from solar on them days. So I’d need the battery to be charged overnight for cheaper and then run the house.

What would you do? And how is the quote? I’m getting prices from 2 local firms but I am baffled by the added complexity of 3 phase v single phase.

We’ve been quoted £18703 for:

Aiko Energy
14.550 kW Total Module Power

30 x 485 Watt Panels (AIKO-A485-MCE54Mb)
12,890 kWh per year

Sunsynk Single Phase 10kW-12kW Hybrid Inverter
12kW of Inverter Power
Sunsynk 1 x SUNSYNK-12K-SG02LP1

Sunsynk W-Series 10.64kWh Battery
31.8kWh of Battery Storage
Sunsynk
3 x SUNSYNK-W10.6

Module-level PV Optimizer
30 x TS4-A-O

£18703.

I have 4 kw solar panels fitted 2015 and I am having a Sigenergy battery 9 kWh fitted soon.
Can I still keep my FITS payments which average out at 21p per kWh which this year gave me£1200 last year which is a good earner.
Any advice greatly appreciated.

Hi all - Complete newbie here (so be gentle) and about to order approx. 45 kWh of batteries. My installer is suggesting either Fox or SigEnergy and wanted to ask for opinions. Fox is significantly cheaper and I am struggling to see why I should pay more for Sig so I thought I'd ask some experts... Please help! Thanks

So I’ve recently switched from Octopus to Fuse Energy and now in day three. First day was fine as the smart meter import from the FuseEnergy and my FoxESS app were pretty much in sync with how much energy I’ve imported from the grid (ie 0.5kwh). Come the next few days after I switch to their TOU tariff it says that I’ve imported about 3kwh from the grid on a daily which can’t be right as my app says I’ve only imported about the same amount - approx 0.5kwh from the grid. Nothing has really the changed the past few days - I’ve been using energy per normal and solar’s always produced in excess during the day so that it charges my battery and powers the house.

Wondering if anyone has experienced this? Should I wait this out or flag it? I have a SMET2 if it helps.

Hi

I've just recently been looking into getting solar + batteries, and have been getting a fair few quotes.

Batteries are the main priority as my usage in winter is around 1000kWh/month, probably averaging 6000-8000kWh/yearly. Mainly due to electric radiators (hoping to get aircon installed next year)

Hopefully getting an EV later this year, but not too sure if this will have any impact at all, aside from the cheap tariff rates.

Roof is N/NW facing, so panels are a nice to have, but probably not a lot of generation in the winter (if at all). Mainly to help subsidise AC throughout the summer next year.

Based in West Sussex, and here's a few quotes I've gotten so far, waiting on two more local quotes, but everyone seems to have quite a backlog at the moment.

Waiting on a revised quote from Solar Dynamics and Boxt, as I'm hoping to push towards the 25-30kWh battery range, to tackle at least 70% of a winter day usage

I've got all of the part numbers and model of equipment, but here's just a quick overview. Just seeing what's peoples thoughts on these pricing. The iHeat one seems too good to be true, but I haven't heard too much of Hanchu. All of these include scaffolding (some provisional pricing as iHeat and Boxt haven't done a site-survey, all online, so can increase in price, and most likely will. One roof side, but need to navigate over a lean-to) and bird proofing

All Solar Works (local)

13 x 540 Watt Aiko Panels
18.08kWh Sigen batteries
5 kW Sigen inverter
£16,246

Solar Dynamics (local)

11 x 470W Jinko panels
9.84kWh Fox batteries (EQ5000-S battery modules)
8kW FOX ESS inverter
£10,797

Boxt

10 x 485 Watt Aiko panels
15.36kWh Sunsynk batteries
5kW Sunsynk inverter
£10,673

iHeat

8 x 480 Watt Longi panels
28.2kWh Hanchu batteries
10kW Hanchu inverter
£10,745

Recent install and I can see that the house is using a trickle amount of electricity (4-5p per day).

I know this isn’t world changing amounts, but just wondering if that trickle usage is standard by the inverter maintaining grid connection, or not.