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Bolt Plus 460W Plug-In Solar Kit with Battery

Name: Bolt Plus 460W Plug-In Solar Kit with Battery
Brand: Thunder
Price: 1549.99 GBP
Availability: InStock

Price

£1,549.99

The Thunder Bolt Plus 460W combines our high-efficiency 460W solar system with 1.92 kWh of smart LiFePO4 battery storage for UK homes. Generate your own solar electricity during the day, store energy for later and manage your home energy from your phone.

The solar generation system is based on the ENA-listed Bolt 460W configuration under reference THUNE/21203/V1, paired with dedicated battery storage and a protected AC connection arrangement.

Ideal for gardens, sheds, outbuildings and suitable flat roofs. Start with one 460W solar panel and upgrade to the two-panel 920W configuration later if you want more solar generation.

Optional upgrades include a flat roof mounting upgrade, 10m AC cable, battery mounting set and professional installation.

AC Cable

Battery Mounting Set

Flat Roof Mounting Upgrade

Installation

Quantity

Features

460W Solar + 1.92 kWh Storage
Combine a high-efficiency 460W N-type TOPCon solar panel with 1.92 kWh of smart LiFePO4 battery storage. Generate your own electricity during the day and store available energy for use later.

ENA-Listed Solar Platform
The solar generation side is based on Thunder's ENA-listed Bolt 460W configuration under reference THUNE/21203/V1, providing a compliant UK-ready foundation for the solar side of the system.

Store Energy for Later
Store available energy for use when solar generation is lower or electricity prices are higher. Time-of-use settings can also help you make better use of lower-cost tariff periods where available.

Start With 460W. Upgrade to 920W Later.
Bolt Plus 460W starts with one 460W solar panel and a dual-input microinverter. A second compatible 460W panel can be added later to increase total solar capacity to 920Wp.

Smart Energy Management
Built-in Wi-Fi and Bluetooth give you access to solar generation, battery status and system settings from your phone through the monitoring platform.

Built for Everyday Energy Storage
The 1.92 kWh battery uses LiFePO4 cells rated for more than 6,000 cycles, with intelligent self-heating, fanless natural cooling and a 10-year warranty.

Made for Gardens & Flat Spaces
Position the solar panel in a sunny garden, on a suitable flat roof, shed, outbuilding or rear extension roof. A flat roof mounting upgrade is available where required. The compact battery can be positioned separately in a suitable protected location closer to your home electrical connection.

Professional Final AC Connection
The solar, microinverter and battery components are designed to work together as a compact home energy system. The battery arrangement uses a protected AC connection, with the final electrical connection completed by a suitably qualified professional.

Everything You Need in One System
Bolt Plus combines solar generation, smart battery storage, microinverter and connection components into one complete Thunder home energy system.

Technical Specifications

Solar Panel

Rated Power: 460 Wp
Cell Technology: N-type i-TOPCon Monocrystalline
Module Efficiency: 23.0%
Maximum Power Voltage (Vmp): 45.4 V
Open Circuit Voltage (Voc): 53.8 V
Maximum Power Current (Imp): 10.14 A
Short Circuit Current (Isc): 10.81 A
Dimensions: 1762 × 1134 × 30 mm
Weight: 21 kg
Junction Box: IP68
Operating Temperature: -40°C to +85°C
Maximum System Voltage: 1500 V DC
Product Warranty: 25 years
Performance Warranty: 30 years

Microinverter

Rated AC Output: 800 VA
MPPTs: 2 independent MPPTs
Inputs: 1 per MPPT
MPPT Range: 16-60 V
Maximum Input Voltage: 65 V
Peak Efficiency: 96.7%
Connectivity: 2.4 GHz Wi-Fi + Bluetooth
Monitoring: S-Miles Home
Protection Rating: IP67
Cooling: Natural convection, fanless
Dimensions: 261 × 180 × 35.1 mm
Weight: 3.2 kg

Battery

Battery Capacity: 1.92 kWh
Cell Type: LiFePO4
Cycle Life: ≥6,000 cycles
Charge / Discharge Power: Up to 1,000 VA
On-Grid Output: 800 VA nominal
Bidirectional Efficiency: Up to 96.5%
Round-Trip Efficiency: Up to 87%
Charge / Discharge Temperature: -20°C to +55°C
Dimensions: 460 × 240 × 203 mm
Weight: 24 kg
Protection Rating: IP66
Cooling: Natural convection, fanless
Noise Level: <17 dB(A)
Connectivity: Bluetooth + 2.4 GHz Wi-Fi
Monitoring: S-Miles Home
Mounting: Floor or wall mounting
Warranty: 10 years

What's in the Box

1× 460W rigid solar panel
1× 1.92 kWh LiFePO4 battery
1× 800VA dual-input smart microinverter
1× AC connection cable
1× Thunder Bolt mounting bracket set
2× DC extension cables
1× Double pole isolator
2× Disconnect tools
2× Protective MC4 caps
1× Set of solar warning labels
1× Installation guide

Panels, battery, and kit accessories are delivered in separate boxes.

FAQs

What is the difference between Bolt 460W and Bolt Plus 460W?
Bolt 460W is our solar-only ENA-compliant plug-in solar system. Bolt Plus 460W combines the same 460W solar generation platform with 1.92 kWh of smart battery storage, allowing available energy to be stored and used later.

Is Bolt Plus 460W an ENA-compliant plug-in solar system?
The solar generation side is based on the ENA-listed Bolt 460W configuration under reference THUNE/21203/V1. The current UK plug-in solar framework applies to solar-only plug-in devices and does not extend to plug-in battery systems, so the Bolt Plus battery connection is treated separately and uses a professional protected AC connection.

How much energy can the battery store?
The battery provides 1.92 kWh of LiFePO4 storage capacity, giving you a useful energy reserve for periods when solar generation is lower or grid electricity is more expensive.

What happens to solar energy I don't use immediately?
Available energy can be stored in the battery for later use, helping you increase self-consumption and reduce the amount of electricity you need to purchase from the grid.

Can the battery charge from the grid as well as solar?
Yes. The battery supports time-of-use charging, allowing it to charge during lower-cost tariff periods and discharge when electricity is more expensive. Actual savings depend on your tariff, system settings and household energy use.

Can I add another solar panel later?
Yes. Bolt Plus 460W starts with one 460W panel and uses one of the two independent solar inputs. A second compatible 460W panel can be added later to increase total solar capacity to 920Wp.

Can I monitor the solar system and battery from my phone?
Yes. Built-in Wi-Fi and Bluetooth allow you to monitor solar generation, battery status and system performance from your phone through the monitoring platform.

Where can I install the Bolt Plus 460W?
The solar panel is particularly suited to gardens, suitable flat roofs, sheds, outbuildings and rear extension roofs. The battery should be installed on a stable surface or suitable wall mount in accordance with the installation guidance and positioned appropriately for its operating environment.

Does the battery require an electrician?
Yes. Unlike the solar-only Bolt plug-in system, the Bolt Plus battery arrangement requires a professional final AC connection. You can arrange your own suitably qualified electrician or select Thunder's installation option when ordering.

Can I add more battery storage later?
Yes. The battery platform supports expansion, with two 1.92 kWh units providing up to 3.84 kWh of combined storage when configured appropriately.

How long is the battery designed to last?
The LiFePO4 cells are rated for at least 6,000 cycles, and the battery is supplied with a 10-year warranty.

Downloads

Know before you buy

Storm Panel Dimensions

80 cm

120 cm

BOLT: Plug-in solar made for UK homes

20-Year Financial Projection

Storm 710W Solar Kit With Battery

System Size

0.71 kWp

4 × Storm 178W

Year 1 Generation

525 kWh

London estimate

Year 1 Savings

£298

At 30p/kWh

Payback Period

~5 Years

April '26 prices

20-year financial projection Chart With Battery.png

Year-by-Year Breakdown

Year	Elec rate (p/kWh)	Generation (kWh)	Self-use (kWh)	Self-use savings (£)	Battery arbitrage (£)	Annual total (£)	Cumulative (£)
1	30.00	525	525	£157	£140	£298	£298
2	30.90	521	521	£161	£144	£305	£603
3	31.83	517	517	£165	£149	£313	£916
4	32.78	514	514	£168	£153	£322	£1,238
5	33.77	510	510	£172	£158	£330	£1,568
6	34.78	506	506	£176	£163	£339	£1,907
7	35.82	503	503	£180	£167	£348	£2,254
8	36.90	499	499	£184	£172	£357	£2,611
9	38.00	496	496	£188	£178	£366	£2,977
10	39.14	492	492	£193	£183	£376	£3,353
11	40.32	489	489	£197	£188	£386	£3,738
12	41.53	486	486	£202	£194	£396	£4,134
13	42.77	482	482	£206	£200	£406	£4,540
14	44.06	479	479	£211	£206	£417	£4,957
15	45.38	475	475	£216	£212	£428	£5,385
16	46.74	472	472	£221	£218	£439	£5,824
17	48.14	469	469	£226	£225	£451	£6,275
18	49.59	465	465	£231	£232	£463	£6,737
19	51.07	462	462	£236	£239	£475	£7,212
20	52.61	459	459	£241	£246	£487	£7,699

Annual consumption: 2,700 kWh (Ofgem typical medium household). Winter 60% / Summer 40%.
System: 4 x Storm 178W flexible solar panels (TopCon monocrystalline), total 0.71 kWp. Microinverter: Hoymiles HMS-800W-2T (800 VA, 2 MPPT, 96.7% peak efficiency).
Orientation: Modelled at 90-degree vertical mounting (typical for fence or balcony railing). This is a conservative estimate. Tilting panels to a more favourable angle will increase generation.
Year 1 generation: 525 kWh (estimated for London, based on typical balcony/fence mounting).
Panel degradation: 2% in year 1, 0.7%/year thereafter (conservative estimate for flexible ETFE panels).
Seasonal generation split: Winter 28% / Summer 72% (Thames region profile).
Self-consumption rate: 100% year-round. System output is well below household demand, so all generation is consumed on-site.
Electricity tariff: 30 p/kWh peak (average smart time-of-use daytime rate), 7 p/kWh off-peak (overnight rate), 3% annual inflation.
Battery: Hoymiles HiBattery 1920 AC (HB-1920-AC-SV), 1.92 kWh usable capacity, LiFePO4 cells, AC-coupled, 87% round-trip efficiency, IP66, 6,000+ cycle life, 10-year warranty.
Battery arbitrage: Off-peak grid charging at overnight rates, peak discharge during daytime. 365 days per year at full capacity (1.92 kWh). Solar generation is consumed directly by the household and does not charge the battery, leaving full battery capacity available for grid arbitrage year-round. Battery operates at 800W maximum output, sufficient to offset household base load during peak hours.
87% round-trip efficiency.

Battery arbitrage savings assume the customer is on a smart time-of-use tariff with off-peak overnight rates. Actual returns may be higher or lower than projected
depending on tariff availability and usage patterns. All figures are estimates based on the assumptions above and should not be considered as guaranteed
returns.

20-Year Financial Projection

Bolt 400W Solar Kit With Battery

System Size

0.40 kWp

1 x Bolt 400W

Year 1 Generation

445 kWh

London estimate

Year 1 Savings

£267

At 30p/kWh

Payback Period

~5 Years

July '26 prices

Year-by-Year Breakdown

Year	Elec rate (p/kWh)	Generation (kWh)	Self-use (kWh)	Self-use savings (£)	Battery arbitrage (£)	Annual total (£)	Cumulative (£)
1	30.00	445	445	£133	£134	£267	£267
2	30.90	443	443	£137	£138	£275	£542
3	31.83	441	441	£140	£142	£283	£825
4	32.78	439	439	£144	£147	£291	£1,116
5	33.77	437	437	£148	£151	£299	£1,414
6	34.78	436	436	£152	£155	£307	£1,721
7	35.82	434	434	£155	£160	£316	£2,037
8	36.90	432	432	£159	£165	£324	£2,361
9	38.00	430	430	£164	£170	£334	£2,695
10	39.14	429	429	£168	£175	£343	£3,038
11	40.32	427	427	£172	£180	£352	£3,390
12	41.53	425	425	£177	£186	£362	£3,752
13	42.77	424	424	£181	£191	£372	£4,125
14	44.06	422	422	£186	£197	£383	£4,508
15	45.38	420	420	£191	£203	£394	£4,901
16	46.74	419	419	£196	£209	£405	£5,306
17	48.14	417	417	£201	£215	£416	£5,722
18	49.59	415	415	£206	£222	£428	£6,150
19	51.07	414	414	£211	£228	£440	£6,589
20	52.61	412	412	£217	£235	£452	£7,041

System: 1 x Bolt 400W rigid solar panel (monocrystalline TOPCon), total 0.40 kWp. Microinverter: Hoymiles HMS-800-2WB (800 VA, 2 MPPT, 96.7% peak efficiency).
Orientation: Modelled at 40-degree tilt, azimuth -6 degrees (near due south), the optimal configuration for London. A ground, wall or balcony frame allows this angle to be set. Output will be lower at other orientations.
Specific yield: 1,122 kWh/kWp/year (PVGIS simulation for London at 40-degree tilt, azimuth -6 degrees, less a 3% allowance for soiling and real-world inverter efficiency).
Year 1 generation: 445 kWh.
Panel degradation: 1% in year 1, 0.4%/year thereafter (standard N-type TOPCon performance warranty).
Seasonal generation split: Winter 33% / Summer 67% (derived from PVGIS monthly output at 40-degree tilt for London).
Self-consumption rate: 100% year-round (blended 100%). System output stays below household demand and the battery absorbs any short-term surplus, so all generation is consumed on site.
Annual consumption: 2,700 kWh (Ofgem typical medium household). Winter 60% / Summer 40%.
Electricity tariff: 30 p/kWh peak (smart time-of-use daytime rate), 8 p/kWh off-peak (overnight rate), 3% annual inflation.
Battery: Hoymiles HiBattery 1920 AC (HB-1920-AC-SV), 1.92 kWh usable capacity, LiFePO4 cells, AC-coupled, 87% round-trip efficiency, IP66, 6,000+ cycle life, 10-year warranty.
Battery arbitrage: Off-peak grid charging at overnight rates, peak discharge during the day. 365 days per year at full capacity (1.92 kWh). Solar generation is consumed directly by the household and does not charge the battery, leaving full battery capacity available for grid arbitrage year-round. Battery operates at 800 W maximum output, sufficient to offset household base load during peak hours. 87% round-trip efficiency.
Export: No export income is included in this projection.
Basis of calculation: Figures are modelled on a 400 W single-panel system with a 1.92 kWh battery.
-

Battery arbitrage savings assume the customer is on a smart time-of-use tariff with off-peak overnight rates. Actual returns may be higher or lower than projected
depending on tariff availability and usage patterns. All figures are estimates based on the assumptions above and should not be considered as guaranteed
returns.

20-Year Financial Projection

Bolt 900W Solar Kit With Battery

System Size

0.93 kWp

2 x 465 W

Year 1 Generation

1,013 kWh

London estimate

Year 1 Savings

£373

At 30p/kWh

Payback Period

~4 Years

July '26 prices

Year-by-Year Breakdown

Year	Elec rate (p/kWh)	Generation (kWh)	Self-use (kWh)	Self-use savings (£)	Battery arbitrage (£)	Annual total (£)	Cumulative (£)
1	30.00	1,013	911	£273	£100	£373	£373
2	30.90	1,009	907	£280	£103	£384	£757
3	31.83	1,005	904	£288	£106	£394	£1,151
4	32.78	1,001	900	£295	£109	£405	£1,555
5	33.77	997	897	£303	£113	£415	£1,971
6	34.78	993	893	£311	£116	£427	£2,398
7	35.82	989	889	£319	£120	£438	£2,836
8	36.90	985	886	£327	£123	£450	£3,286
9	38.00	981	882	£335	£127	£462	£3,748
10	39.14	977	879	£344	£131	£475	£4,223
11	40.32	973	875	£353	£135	£487	£4,710
12	41.53	969	872	£362	£139	£501	£5,211
13	42.77	965	868	£371	£143	£514	£5,725
14	44.06	961	865	£381	£147	£528	£6,253
15	45.38	958	861	£391	£151	£542	£6,795
16	46.74	954	858	£401	£156	£557	£7,352
17	48.14	950	854	£411	£161	£572	£7,924
18	49.59	946	851	£422	£166	£588	£8,512
19	51.07	942	848	£433	£170	£603	£9,115
20	52.61	939	844	£444	£176	£620	£9,735

System: 2 x 465 W rigid solar panels (N-type monocrystalline TOPCon, dual glass), total 0.93 kWp. Microinverter: Hoymiles HMS-800-2WB (800 VA, 2 MPPT, 96.7% peak efficiency), one panel per MPPT input.
Orientation: Modelled at 40-degree tilt, azimuth -6 degrees (near due south), the optimal configuration for London. A ground, wall or balcony frame allows this angle to be set. Output will be lower at other orientations..
Specific yield: 1,100 kWh/kWp/year (PVGIS simulation for London at 40-degree tilt, azimuth -6 degrees, less a 3% allowance for soiling and real-world inverter efficiency, and a further 2% for microinverter clipping as 930 Wp of panels feed an 800 VA microinverter).
Year 1 generation: 1,013 kWh.
Panel degradation: 1% in year 1, 0.4%/year thereafter (standard N-type TOPCon performance warranty).
Seasonal generation split: Winter 33% / Summer 67% (derived from PVGIS monthly output at 40-degree tilt for London).
Self-consumption rate: Winter 100% / Summer 85% (blended 90%). The battery stores midday summer surplus that would otherwise be unusable, raising on-site consumption well above an equivalent system without storage.
Annual consumption: 2,700 kWh (Ofgem typical medium household). Winter 60% / Summer 40%.
Electricity tariff: 30 p/kWh peak (smart time-of-use daytime rate), 8 p/kWh off-peak (overnight rate), 3% annual inflation.
Battery: Hoymiles HiBattery 1920 AC (HB-1920-AC-SV), 1.92 kWh usable capacity, LiFePO4 cells, AC-coupled, 87% round-trip efficiency, IP66, 6,000+ cycle life, 10-year warranty.
Battery arbitrage: Off-peak grid charging at overnight rates, peak discharge during the day. 180 winter days at full capacity (1.92 kWh) and 185 summer days at 50% capacity, as surplus solar charges part of the battery during summer daylight hours and that value is already counted in the self-consumption figure. Battery operates at 800 W maximum output, sufficient to offset household base load during peak hours. 87% round-trip efficiency.
Export: No export income is included in this projection.
Basis of calculation: Figures are modelled on a 930 W (2 x 465 W) system with a 1.92 kWh battery.
-

Battery arbitrage savings assume the customer is on a smart time-of-use tariff with off-peak overnight rates. Actual returns may be higher or lower than projected
depending on tariff availability and usage patterns. All figures are estimates based on the assumptions above and should not be considered as guaranteed
returns.

20-Year Financial Projection

Storm 710W Solar Kit

System Size

0.71 kWp

4 × Storm 178W

Year 1 Generation

525 kWh

London estimate

Year 1 Savings

£131

At 25p/kWh

Payback Period

~5 Years

April '26 prices

Year-by-Year Breakdown

Year	Elec rate (p/kWh)	Generation (kWh)	Self-use (kWh)	Annual savings (£)	Cumulative (£)
1	25	525	525	£131	£131
2	25.75	521	521	£134	£265
3	26.52	517	517	£137	£403
4	27.32	514	514	£140	£543
5	28.14	510	510	£144	£686
6	28.98	506	506	£147	£833
7	29.85	503	503	£150	£983
8	30.75	499	499	£153	£1,137
9	31.67	496	496	£157	£1,294
10	32.62	492	492	£160	£1,454
11	33.6	489	489	£164	£1,619
12	34.61	486	486	£168	£1,787
13	35.64	482	482	£172	£1,959
14	36.71	479	479	£176	£2,134
15	37.81	475	475	£180	£2,314
16	38.95	472	472	£184	£2,498
17	40.12	469	469	£188	£2,686
18	41.32	465	465	£192	£2,878
19	42.56	462	462	£197	£3,075
20	43.84	459	459	£201	£3,276

Annual consumption: 2,700 kWh (Ofgem typical medium household). Winter 60% / Summer 40%.
System: 4 x Storm 178W flexible solar panels (TopCon monocrystalline), total 0.71 kWp. Microinverter: Hoymiles HMS-800W-2T (800 VA, 2 MPPT, 96.7% peak efficiency).
Orientation: Modelled at 90-degree vertical mounting (typical for fence or balcony railing). This is a conservative estimate. Tilting panels to a more favourable angle will increase generation.
Year 1 generation: 525 kWh (estimated for London, based on typical balcony/fence mounting).
Panel degradation: 2% in year 1, 0.7%/year thereafter (conservative estimate for flexible ETFE panels).
Seasonal generation split: Winter 28% / Summer 72% (Thames region profile).
Self-consumption rate: 100% year-round. System output is well below household demand, so all generation is consumed on-site.
Electricity tariff: 25 p/kWh (Ofgem price cap, April 2026), 3% annual inflation assumed.

Actual returns may be higher or lower than projected depending on tariff changes and usage patterns. All figures are estimates based on the assumptions above
and should not be considered as guaranteed returns.

20-Year Financial Projection

Bolt 400W Solar Kit

System Size

0.40 kWp

1 x Bolt 400W

Year 1 Generation

445 kWh

London estimate

Year 1 Savings

£112

At 26p/kWh

Payback Period

~5 Years

July '26 prices

Year-by-Year Breakdown

Year	Elec rate (p/kWh)	Generation (kWh)	Self-use (kWh)	Annual savings (£)	Cumulative (£)
1	26.00	445	430	£112	£112
2	26.78	443	428	£115	£226
3	27.58	441	426	£118	£344
4	28.41	439	424	£121	£464
5	29.26	437	423	£124	£588
6	30.14	436	421	£127	£715
7	31.05	434	419	£130	£845
8	31.98	432	418	£134	£979
9	32.94	430	416	£137	£1,116
10	33.92	429	414	£141	£1,256
11	34.94	427	413	£144	£1,401
12	35.99	425	411	£148	£1,549
13	37.07	424	409	£152	£1,700
14	38.18	422	408	£156	£1,856
15	39.33	420	406	£160	£2,016
16	40.51	419	405	£164	£2,180
17	41.72	417	403	£168	£2,348
18	42.97	415	401	£172	£2,520
19	44.26	414	400	£177	£2,697
20	45.59	412	398	£182	£2,879

System: 1 x Bolt 400W rigid solar panel (monocrystalline TOPCon), total 0.40 kWp. Microinverter: Hoymiles HMS-800-2WB (800 VA, 2 MPPT, 96.7% peak efficiency).
Orientation: Modelled at 40-degree tilt, azimuth -6 degrees (near due south), the optimal configuration for London. A ground, wall or balcony frame allows this angle to be set. Output will be lower at other orientations.
Specific yield: 1,122 kWh/kWp/year (PVGIS simulation for London at 40-degree tilt, azimuth -6 degrees, less a 3% allowance for soiling and real-world inverter efficiency).
Year 1 generation: 445 kWh.
Panel degradation: 1% in year 1, 0.4%/year thereafter (standard N-type TOPCon performance warranty).
Seasonal generation split: Winter 33% / Summer 67% (derived from PVGIS monthly output at 40-degree tilt for London).
Self-consumption rate: Winter 100% / Summer 95% (blended 97%). System output stays below household demand for almost all daylight hours, so nearly all generation is consumed on site.
Annual consumption: 2,700 kWh (Ofgem typical medium household). Winter 60% / Summer 40%.
Electricity tariff: 26 p/kWh (Ofgem price cap, July 2026), 3% annual inflation assumed.
Export: No export income is included in this projection.
Basis of calculation: Figures are modelled on a 400 W single-panel system.
-

Actual returns may be higher or lower than projected depending on tariff changes and usage patterns. All figures are estimates based on the assumptions above
and should not be considered as guaranteed returns.

20-Year Financial Projection

Bolt 900W Solar Kit

System Size

0.93 kWp

2 x 465W

Year 1 Generation

1,013 kWh

London estimate

Year 1 Savings

£193

At 26p/kWh

Payback Period

~4 Years

July '26 prices

Year-by-Year Breakdown

Year	Elec rate (p/kWh)	Generation (kWh)	Self-use (kWh)	Annual savings (£)	Cumulative (£)
1	26.00	1,013	741	£193	£193
2	26.78	1,009	738	£198	£391
3	27.58	1,005	735	£203	£593
4	28.41	1,001	733	£208	£802
5	29.26	997	730	£214	£1,015
6	30.14	993	727	£219	£1,234
7	31.05	989	724	£225	£1,459
8	31.98	985	721	£231	£1,689
9	32.94	981	718	£236	£1,926
10	33.92	977	715	£243	£2,168
11	34.94	973	712	£249	£2,417
12	35.99	969	709	£255	£2,673
13	37.07	965	707	£262	£2,935
14	38.18	961	704	£269	£3,203
15	39.33	958	701	£276	£3,479
16	40.51	954	698	£283	£3,762
17	41.72	950	695	£290	£4,052
18	42.97	946	693	£298	£4,349
19	44.26	942	690	£305	£4,655
20	45.59	939	687	£313	£4,968

System: 2 x 465 W rigid solar panels (N-type monocrystalline TOPCon, dual glass), total 0.93 kWp. Microinverter: Hoymiles HMS-800-2WB (800 VA, 2 MPPT, 96.7% peak efficiency), one panel per MPPT input.
Orientation: Modelled at 40-degree tilt, azimuth -6 degrees (near due south), the optimal configuration for London. A ground, wall or balcony frame allows this angle to be set. Output will be lower at other orientations.
Specific yield: 1,100 kWh/kWp/year (PVGIS simulation for London at 40-degree tilt, azimuth -6 degrees, less a 3% allowance for soiling and real-world inverter efficiency, and a further 2% for microinverter clipping as 930 Wp of panels feed an 800 VA microinverter).
Year 1 generation: 1,013 kWh.
Panel degradation: 1% in year 1, 0.4%/year thereafter (standard N-type TOPCon performance warranty).
Seasonal generation split: Winter 33% / Summer 67% (derived from PVGIS monthly output at 40-degree tilt for London).
Self-consumption rate: Winter 100% / Summer 60% (blended 73%). Midday summer output exceeds typical household base load, so a share of generation cannot be used on site.
Annual consumption: 2,700 kWh (Ofgem typical medium household). Winter 60% / Summer 40%.
Electricity tariff: 26 p/kWh (Ofgem price cap, July 2026), 3% annual inflation assumed.
Export: No export income is included in this projection.
Basis of calculation: Figures are modelled on a 930 W (2 x 465 W) system.
-

Actual returns may be higher or lower than projected depending on tariff changes and usage patterns. All figures are estimates based on the assumptions above
and should not be considered as guaranteed returns.

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*Calculations are based on official solar radiation data from the European Commission's PVGIS database.

**Estimated production accounts for a 14% system loss and assumes a vertical panel angle (90° inclination).

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