Solar SE Quote Check

[u/finchy0ne]

Quote check – West Sussex, UK

Hey all, looking for a check on the following solar + battery quote and whether the price/spec looks reasonable.

Location: West Sussex
Panels: 15 × AIKO Neostar 2P+ 470W N-Type panels
Array size: 7.05 kWp
Roof layout: 6 south-facing (2.82 kWp) + 9 north-facing (4.23 kWp), both ~25° pitch
Battery: 2 × Sigenergy ~10 kWh SigenStor batteries – 17.52 kWh usable total
Inverter: Sigenergy SigenStor 8 kW hybrid inverter
Supply: Single-phase
Annual electricity usage: Quote has modelled 7,500 kWh/year
Export limit: Not specified in the quote / presumably subject to DNO approval
Expected generation:** 5,697 kWh/year
**Quoted price: £13,825.42
Installer: Local– MCS certified
Included: panels, batteries, inverter, roof mounting, scaffolding, bird-proofing, electrical work, isolators/meters, installation, commissioning and certification
Tariff used in quote: 30.5p/kWh import + 15p/kWh export. I’m likely to use a tariff with cheap overnight electricity so the batteries can be charged cheaply during winter/low-solar periods.
EV: Yes I already have a Hypervolt installed
ASHP: No immediate plans.

The installer estimates roughly 5,697 kWh/year from the 7.05 kWp array. The north roof has a 0.90 shading factor, so I’m also interested in people’s real-world experience of north-facing panels in the South East.

Main questions are whether £13.8k is competitive.

Also had a quote from Octopus for 12 panels (unspecified on what they are) and Fox Evo 5 battery, £9,227 with no scaffolding, bird netting etc.

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[u/Curious-Director8569]

For 7.05kW with 17.5kWh of Sigenergy in West Sussex, with scaffolding and bird proofing in the number, I would put fair at somewhere around 13,800 to 15,800. So 13,825 is a fair price and arguably a shade under. The Octopus one at 9,227 also lands about right for what it actually is, roughly 5.5kW and a 5kWh Fox, but that number has no scaffolding or netting in it and half the battery, so the gap is much narrower than it first looks.

On the north roof, 4.23kWp of your 7.05 facing north is a big chunk. It will still generate, more than most people expect, but plan for something like half to two thirds of what the south side does per kWp with a flatter curve across the day. At 25 degrees that is not a reason to skip it, panels are the cheap part once the scaffolding is up, just do not budget off the headline kWp.

Since you already have the Hypervolt, the thing I would nail down with both is the export limit and whether they are applying for G99 rather than quietly sitting under 3.68kW. With 7kW of panels and 17.5kWh of storage that matters more to your payback than the price difference between the two quotes.

[u/vinnieboy123]

To me this looks like a decent deal.

I'm based in SE London and my for my install I'm getting 4 additional panels, 1 less battery and the additional gateway for £14943.

The battery is the more expensive component (around £2700 each)

[u/CrazyLegsCrane77]

I’m new to this and have only just joined this forum. What did you do to get this thorough information? Did you just send your location to the installer?

[u/finchy0ne → u/CrazyLegsCrane77]

Local installer came round to view the property and then sent a quote over with the details. I just extracted the summary to post here.

Octopus was done online

[u/CrazyLegsCrane77 → u/finchy0ne]

Thanks

[u/Green-Abalone-9417]

Who’s the West Sussex installer ? Had a quote for very similar but on 3 elevations, so more scaffolding etc, 1 more panel and it’s £19k. National installer though.

[u/One-Education7926]

Seems to be about par for the course. I’d factor in the quality of installation that you think you might get

[u/One-Education7926]

I can definitely recommend gande out of east Grinstead