Sunchees home solar sizing guide

A bedroom count gives you a useful starting point, but the appliances inside the home determine the system. In our 3-bedroom model, everyday loads use 8.81 kWh per day; running three bedroom air conditioners overnight raises that estimate to 18.57 kWh. That change affects the solar array, inverter and battery in different ways. Use the 150 scenarios below to find a planning range, then let us confirm it from your actual load list.

1–5bedroom sizes

55–210m²reference floor area

3appliance and AC profiles

150country × home scenarios

Bedroom count gives a range; your appliances set the final size

Two 3-bedroom homes can need very different systems. A home supporting refrigeration, lights, fans, television, internet, small kitchen appliances, laundry and a water pump has a much smaller energy requirement than the same home running three air conditioners through the night. In this model, those cases use 8.81 and 18.57 kWh per day. Adding a living-room air conditioner brings the estimate to 22.13 kWh per day.

PV replaces daily energy

We divide daily use by the location's PVGIS yield, add a 15% planning reserve, and show both annual-average and lowest-month array sizes.

The inverter carries simultaneous loads

We total appliances that may run together, add 25% headroom, and round up to the next practical inverter size.

The battery supports selected loads

The model uses one day of backup, 80% depth of discharge, 90% battery-to-AC efficiency and a 55%–70% critical-load share.

Use these figures for early planning. Electric water heating, space heating, EV charging, pools, workshops, large deep-well pumps and electric ovens are outside the model. Add any of these loads before choosing equipment.

Solar System for a 1, 2, 3, 4 or 5 Bedroom House

How Sunchees turns your house details into a system design

Our residential, off-grid and hybrid ranges cover different ways of powering a home. A sizing request records the country and city, 120V/240V split-phase or 230V single-phase supply where applicable, appliance watts and hours, and the loads reserved for outages.

1. Location and electrical supply

Tell us the country, city, voltage and whether the property uses single-phase, split-phase or three-phase power. Location changes PV output; the electrical supply changes inverter and distribution choices.

2. Appliances and running hours

List the power, quantity and daily hours for air conditioners, pumps, refrigerators, kitchen equipment and other important loads. Note which appliances may run together.

3. Your backup priorities

Choose which appliances must continue during an outage and how many hours or days you want to support them. Those choices determine stored energy.

4. We confirm the equipment and bill of materials

We check PV kWp, inverter kW and battery kWh separately, then review starting loads, MPPT and string limits, roof conditions and the property's electrical supply. Ready-made kits help you compare equipment, while the confirmed project file defines the order.

Sunchees home solar systems Sunchees off-grid systems Sunchees hybrid systems Sunchees project examples

What size solar system does a 1-bedroom house need?

Our 1-bedroom planning home uses 55 m² and 2 occupants. The three rows keep the same everyday appliances, then add bedroom air conditioning and whole-home air conditioning. Your location determines how much PV capacity is needed to replenish each daily load.

Usage profile	Reference area	People	Daily energy (kWh)	Concurrent peak (kW)	Calculated battery (kWh)	Modular battery (kWh)
Basic / no AC	55 m²	2	6.92	2.75	6.73	10.24
Bedroom night AC	55 m²	2	10.04	3.55	8.37	10.24
Whole-home AC	55 m²	2	13.80	4.75	10.54	15.36

What size solar system does a 2-bedroom house need?

Our 2-bedroom planning home uses 85 m² and 3 occupants. The three rows keep the same everyday appliances, then add bedroom air conditioning and whole-home air conditioning. Your location determines how much PV capacity is needed to replenish each daily load.

Usage profile	Reference area	People	Daily energy (kWh)	Concurrent peak (kW)	Calculated battery (kWh)	Modular battery (kWh)
Basic / no AC	85 m²	3	7.85	3.00	7.63	10.24
Bedroom night AC	85 m²	3	14.29	4.60	11.91	15.36
Whole-home AC	85 m²	3	17.95	5.80	13.71	15.36

What size solar system does a 3-bedroom house need?

Our 3-bedroom planning home uses 120 m² and 4 occupants. The three rows keep the same everyday appliances, then add bedroom air conditioning and whole-home air conditioning. Your location determines how much PV capacity is needed to replenish each daily load.

Usage profile	Reference area	People	Daily energy (kWh)	Concurrent peak (kW)	Calculated battery (kWh)	Modular battery (kWh)
Basic / no AC	120 m²	4	8.81	3.25	8.57	10.24
Bedroom night AC	120 m²	4	18.57	5.65	15.47	20.48
Whole-home AC	120 m²	4	22.13	6.85	16.90	20.48

What size solar system does a 4-bedroom house need?

Our 4-bedroom planning home uses 160 m² and 5 occupants. The three rows keep the same everyday appliances, then add bedroom air conditioning and whole-home air conditioning. Your location determines how much PV capacity is needed to replenish each daily load.

Usage profile	Reference area	People	Daily energy (kWh)	Concurrent peak (kW)	Calculated battery (kWh)	Modular battery (kWh)
Basic / no AC	160 m²	5	9.80	3.50	9.53	10.24
Bedroom night AC	160 m²	5	22.88	6.70	19.07	20.48
Whole-home AC	160 m²	5	26.34	7.90	20.12	20.48

What size solar system does a 5-bedroom house need?

Our 5-bedroom planning home uses 210 m² and 6 occupants. The three rows keep the same everyday appliances, then add bedroom air conditioning and whole-home air conditioning. Your location determines how much PV capacity is needed to replenish each daily load.

Usage profile	Reference area	People	Daily energy (kWh)	Concurrent peak (kW)	Calculated battery (kWh)	Modular battery (kWh)
Basic / no AC	210 m²	6	10.85	3.75	10.55	15.36
Bedroom night AC	210 m²	6	27.25	7.75	22.71	25.60
Whole-home AC	210 m²	6	30.61	8.95	23.38	25.60

Why the same house needs a different PV array in another country

The appliance load stays the same when we compare locations, while the energy produced by each installed kWp changes. We used European Commission JRC PVGIS 5.3 data for one reference city in each country. These city points make the scenarios comparable; an exact design also uses the property's coordinates, roof direction, tilt and shading.

Country	Reference city	Annual average (kWh/kWp/day)	Lowest monthly average (kWh/kWp/day)	Lowest month	Annual output (kWh/kWp)
Bahamas	Nassau	4.39	3.84	Dec	1603.38
Jamaica	Kingston	4.56	4.18	Nov	1662.99
Nigeria	Lagos	3.85	2.87	Jul	1406.31
Tanzania	Dar es Salaam	4.34	3.65	Apr	1582.45
UAE	Dubai	4.69	4.20	Dec	1713.39
Costa Rica	San Jose	3.62	2.97	Oct	1320.75
Ecuador	Quito	3.58	3.25	Dec	1307.28
Uzbekistan	Tashkent	4.23	3.00	Dec	1542.26
New Zealand	Auckland	3.94	2.88	Jun	1436.99
United Kingdom	London	2.79	1.30	Dec	1019.08

All 150 country, bedroom and usage scenarios

Open a country to compare every combination. Each row shows floor area, daily energy, inverter size, modular battery capacity, annual-average PV, lowest-month PV and the corresponding number of 600W panels.

BahamasReference location: Nassau Lowest month 3.84 kWh/kWp/day

PVGIS gives Nassau an annual average of 4.39 kWh per day for each installed kWp. The lowest monthly average is 3.84 kWh/kWp/day in Dec. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	1.81	2.07	4
Basic / no AC	2	85	7.85	5	10.24	2.06	2.35	4
Basic / no AC	3	120	8.81	5	10.24	2.31	2.64	5
Basic / no AC	4	160	9.80	5	10.24	2.57	2.93	5
Basic / no AC	5	210	10.85	5	15.36	2.84	3.25	6
Bedroom night AC	1	55	10.04	5	10.24	2.63	3.01	6
Bedroom night AC	2	85	14.29	6	15.36	3.74	4.28	8
Bedroom night AC	3	120	18.57	8	20.48	4.86	5.56	10
Bedroom night AC	4	160	22.88	10	20.48	5.99	6.85	12
Bedroom night AC	5	210	27.25	10	25.60	7.14	8.16	14
Whole-home AC	1	55	13.80	6	15.36	3.62	4.13	7
Whole-home AC	2	85	17.95	8	15.36	4.70	5.38	9
Whole-home AC	3	120	22.13	10	20.48	5.80	6.63	12
Whole-home AC	4	160	26.34	10	20.48	6.90	7.89	14
Whole-home AC	5	210	30.61	12	25.60	8.02	9.17	16

JamaicaReference location: Kingston Lowest month 4.18 kWh/kWp/day

PVGIS gives Kingston an annual average of 4.56 kWh per day for each installed kWp. The lowest monthly average is 4.18 kWh/kWp/day in Nov. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	1.75	1.90	4
Basic / no AC	2	85	7.85	5	10.24	1.98	2.16	4
Basic / no AC	3	120	8.81	5	10.24	2.22	2.42	5
Basic / no AC	4	160	9.80	5	10.24	2.47	2.70	5
Basic / no AC	5	210	10.85	5	15.36	2.74	2.99	5
Bedroom night AC	1	55	10.04	5	10.24	2.53	2.76	5
Bedroom night AC	2	85	14.29	6	15.36	3.60	3.93	7
Bedroom night AC	3	120	18.57	8	20.48	4.68	5.11	9
Bedroom night AC	4	160	22.88	10	20.48	5.77	6.29	11
Bedroom night AC	5	210	27.25	10	25.60	6.87	7.50	13
Whole-home AC	1	55	13.80	6	15.36	3.48	3.80	7
Whole-home AC	2	85	17.95	8	15.36	4.53	4.94	9
Whole-home AC	3	120	22.13	10	20.48	5.58	6.09	11
Whole-home AC	4	160	26.34	10	20.48	6.64	7.25	13
Whole-home AC	5	210	30.61	12	25.60	7.72	8.42	15

NigeriaReference location: Lagos Lowest month 2.87 kWh/kWp/day

PVGIS gives Lagos an annual average of 3.85 kWh per day for each installed kWp. The lowest monthly average is 2.87 kWh/kWp/day in Jul. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	2.07	2.77	5
Basic / no AC	2	85	7.85	5	10.24	2.34	3.15	6
Basic / no AC	3	120	8.81	5	10.24	2.63	3.53	6
Basic / no AC	4	160	9.80	5	10.24	2.93	3.93	7
Basic / no AC	5	210	10.85	5	15.36	3.24	4.35	8
Bedroom night AC	1	55	10.04	5	10.24	3.00	4.02	7
Bedroom night AC	2	85	14.29	6	15.36	4.27	5.73	10
Bedroom night AC	3	120	18.57	8	20.48	5.55	7.44	13
Bedroom night AC	4	160	22.88	10	20.48	6.83	9.17	16
Bedroom night AC	5	210	27.25	10	25.60	8.14	10.92	19
Whole-home AC	1	55	13.80	6	15.36	4.12	5.53	10
Whole-home AC	2	85	17.95	8	15.36	5.36	7.19	12
Whole-home AC	3	120	22.13	10	20.48	6.61	8.87	15
Whole-home AC	4	160	26.34	10	20.48	7.87	10.55	18
Whole-home AC	5	210	30.61	12	25.60	9.14	12.27	21

TanzaniaReference location: Dar es Salaam Lowest month 3.65 kWh/kWp/day

PVGIS gives Dar es Salaam an annual average of 4.34 kWh per day for each installed kWp. The lowest monthly average is 3.65 kWh/kWp/day in Apr. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	1.83	2.18	4
Basic / no AC	2	85	7.85	5	10.24	2.08	2.47	5
Basic / no AC	3	120	8.81	5	10.24	2.33	2.78	5
Basic / no AC	4	160	9.80	5	10.24	2.60	3.09	6
Basic / no AC	5	210	10.85	5	15.36	2.88	3.42	6
Bedroom night AC	1	55	10.04	5	10.24	2.66	3.16	6
Bedroom night AC	2	85	14.29	6	15.36	3.79	4.50	8
Bedroom night AC	3	120	18.57	8	20.48	4.92	5.85	10
Bedroom night AC	4	160	22.88	10	20.48	6.06	7.21	13
Bedroom night AC	5	210	27.25	10	25.60	7.22	8.59	15
Whole-home AC	1	55	13.80	6	15.36	3.66	4.35	8
Whole-home AC	2	85	17.95	8	15.36	4.76	5.66	10
Whole-home AC	3	120	22.13	10	20.48	5.86	6.97	12
Whole-home AC	4	160	26.34	10	20.48	6.98	8.30	14
Whole-home AC	5	210	30.61	12	25.60	8.11	9.64	17

UAEReference location: Dubai Lowest month 4.20 kWh/kWp/day

PVGIS gives Dubai an annual average of 4.69 kWh per day for each installed kWp. The lowest monthly average is 4.20 kWh/kWp/day in Dec. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	1.70	1.89	4
Basic / no AC	2	85	7.85	5	10.24	1.92	2.15	4
Basic / no AC	3	120	8.81	5	10.24	2.16	2.41	5
Basic / no AC	4	160	9.80	5	10.24	2.40	2.68	5
Basic / no AC	5	210	10.85	5	15.36	2.66	2.97	5
Bedroom night AC	1	55	10.04	5	10.24	2.46	2.75	5
Bedroom night AC	2	85	14.29	6	15.36	3.50	3.91	7
Bedroom night AC	3	120	18.57	8	20.48	4.55	5.08	9
Bedroom night AC	4	160	22.88	10	20.48	5.61	6.26	11
Bedroom night AC	5	210	27.25	10	25.60	6.68	7.46	13
Whole-home AC	1	55	13.80	6	15.36	3.38	3.78	7
Whole-home AC	2	85	17.95	8	15.36	4.40	4.91	9
Whole-home AC	3	120	22.13	10	20.48	5.43	6.06	11
Whole-home AC	4	160	26.34	10	20.48	6.46	7.21	13
Whole-home AC	5	210	30.61	12	25.60	7.51	8.38	14

Costa RicaReference location: San Jose Lowest month 2.97 kWh/kWp/day

PVGIS gives San Jose an annual average of 3.62 kWh per day for each installed kWp. The lowest monthly average is 2.97 kWh/kWp/day in Oct. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	2.20	2.68	5
Basic / no AC	2	85	7.85	5	10.24	2.49	3.04	6
Basic / no AC	3	120	8.81	5	10.24	2.80	3.41	6
Basic / no AC	4	160	9.80	5	10.24	3.11	3.79	7
Basic / no AC	5	210	10.85	5	15.36	3.45	4.20	8
Bedroom night AC	1	55	10.04	5	10.24	3.19	3.89	7
Bedroom night AC	2	85	14.29	6	15.36	4.54	5.53	10
Bedroom night AC	3	120	18.57	8	20.48	5.90	7.19	12
Bedroom night AC	4	160	22.88	10	20.48	7.27	8.86	15
Bedroom night AC	5	210	27.25	10	25.60	8.66	10.55	18
Whole-home AC	1	55	13.80	6	15.36	4.38	5.34	9
Whole-home AC	2	85	17.95	8	15.36	5.70	6.95	12
Whole-home AC	3	120	22.13	10	20.48	7.03	8.57	15
Whole-home AC	4	160	26.34	10	20.48	8.37	10.20	17
Whole-home AC	5	210	30.61	12	25.60	9.72	11.85	20

EcuadorReference location: Quito Lowest month 3.25 kWh/kWp/day

PVGIS gives Quito an annual average of 3.58 kWh per day for each installed kWp. The lowest monthly average is 3.25 kWh/kWp/day in Dec. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	2.22	2.45	5
Basic / no AC	2	85	7.85	5	10.24	2.52	2.78	5
Basic / no AC	3	120	8.81	5	10.24	2.83	3.12	6
Basic / no AC	4	160	9.80	5	10.24	3.15	3.47	6
Basic / no AC	5	210	10.85	5	15.36	3.49	3.84	7
Bedroom night AC	1	55	10.04	5	10.24	3.23	3.55	6
Bedroom night AC	2	85	14.29	6	15.36	4.59	5.06	9
Bedroom night AC	3	120	18.57	8	20.48	5.97	6.57	11
Bedroom night AC	4	160	22.88	10	20.48	7.35	8.10	14
Bedroom night AC	5	210	27.25	10	25.60	8.75	9.64	17
Whole-home AC	1	55	13.80	6	15.36	4.43	4.88	9
Whole-home AC	2	85	17.95	8	15.36	5.77	6.35	11
Whole-home AC	3	120	22.13	10	20.48	7.11	7.83	14
Whole-home AC	4	160	26.34	10	20.48	8.46	9.32	16
Whole-home AC	5	210	30.61	12	25.60	9.83	10.83	19

UzbekistanReference location: Tashkent Lowest month 3.00 kWh/kWp/day

PVGIS gives Tashkent an annual average of 4.23 kWh per day for each installed kWp. The lowest monthly average is 3.00 kWh/kWp/day in Dec. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	1.88	2.65	5
Basic / no AC	2	85	7.85	5	10.24	2.13	3.01	6
Basic / no AC	3	120	8.81	5	10.24	2.40	3.38	6
Basic / no AC	4	160	9.80	5	10.24	2.66	3.76	7
Basic / no AC	5	210	10.85	5	15.36	2.95	4.16	7
Bedroom night AC	1	55	10.04	5	10.24	2.73	3.85	7
Bedroom night AC	2	85	14.29	6	15.36	3.88	5.48	10
Bedroom night AC	3	120	18.57	8	20.48	5.05	7.12	12
Bedroom night AC	4	160	22.88	10	20.48	6.22	8.77	15
Bedroom night AC	5	210	27.25	10	25.60	7.41	10.45	18
Whole-home AC	1	55	13.80	6	15.36	3.75	5.29	9
Whole-home AC	2	85	17.95	8	15.36	4.88	6.88	12
Whole-home AC	3	120	22.13	10	20.48	6.02	8.48	15
Whole-home AC	4	160	26.34	10	20.48	7.16	10.10	17
Whole-home AC	5	210	30.61	12	25.60	8.32	11.73	20

New ZealandReference location: Auckland Lowest month 2.88 kWh/kWp/day

PVGIS gives Auckland an annual average of 3.94 kWh per day for each installed kWp. The lowest monthly average is 2.88 kWh/kWp/day in Jun. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	2.02	2.76	5
Basic / no AC	2	85	7.85	5	10.24	2.29	3.13	6
Basic / no AC	3	120	8.81	5	10.24	2.57	3.52	6
Basic / no AC	4	160	9.80	5	10.24	2.86	3.91	7
Basic / no AC	5	210	10.85	5	15.36	3.17	4.33	8
Bedroom night AC	1	55	10.04	5	10.24	2.93	4.01	7
Bedroom night AC	2	85	14.29	6	15.36	4.17	5.71	10
Bedroom night AC	3	120	18.57	8	20.48	5.42	7.42	13
Bedroom night AC	4	160	22.88	10	20.48	6.68	9.14	16
Bedroom night AC	5	210	27.25	10	25.60	7.95	10.88	19
Whole-home AC	1	55	13.80	6	15.36	4.03	5.51	10
Whole-home AC	2	85	17.95	8	15.36	5.24	7.17	12
Whole-home AC	3	120	22.13	10	20.48	6.46	8.84	15
Whole-home AC	4	160	26.34	10	20.48	7.69	10.52	18
Whole-home AC	5	210	30.61	12	25.60	8.93	12.22	21

United KingdomReference location: London Lowest month 1.30 kWh/kWp/day

PVGIS gives London an annual average of 2.79 kWh per day for each installed kWp. The lowest monthly average is 1.30 kWh/kWp/day in Dec. The PV columns below include a 15% planning reserve.

Profile	Beds	Area (m²)	Daily use (kWh)	Inverter (kW)	Battery (kWh)	Average PV (kWp)	Low-month PV (kWp)	600W panels
Basic / no AC	1	55	6.92	5	10.24	2.85	6.12	11
Basic / no AC	2	85	7.85	5	10.24	3.24	6.94	12
Basic / no AC	3	120	8.81	5	10.24	3.63	7.79	13
Basic / no AC	4	160	9.80	5	10.24	4.04	8.67	15
Basic / no AC	5	210	10.85	5	15.36	4.47	9.60	16
Bedroom night AC	1	55	10.04	5	10.24	4.14	8.88	15
Bedroom night AC	2	85	14.29	6	15.36	5.89	12.64	22
Bedroom night AC	3	120	18.57	8	20.48	7.65	16.43	28
Bedroom night AC	4	160	22.88	10	20.48	9.43	20.24	34
Bedroom night AC	5	210	27.25	10	25.60	11.23	24.11	41
Whole-home AC	1	55	13.80	6	15.36	5.69	12.21	21
Whole-home AC	2	85	17.95	8	15.36	7.40	15.88	27
Whole-home AC	3	120	22.13	10	20.48	9.12	19.58	33
Whole-home AC	4	160	26.34	10	20.48	10.86	23.30	39
Whole-home AC	5	210	30.61	12	25.60	12.62	27.08	46

Which household appliances are included?

The basic profile includes refrigeration, LED lighting, fans, television, internet, small kitchen appliances, laundry, a water pump and personal electronics. The bedroom-night-AC profile adds one 0.8kW air conditioner per bedroom, operating for eight hours at a 55% load factor. The whole-home profile also adds one 1.2kW living-room unit for six hours.

Basic / no AC: prioritises refrigeration, lighting, communications, normal kitchen use and a household pump.
Bedroom night AC: adds overnight cooling to the energy and simultaneous-power estimate.
Whole-home AC: adds living-room cooling, increasing PV, inverter and battery requirements.

Turn the table into your Sunchees quotation

Send us the rated power, quantity and daily running time for each appliance, and mark the loads that must remain on during an outage. We use that list to confirm concurrent AC power, daily energy, overnight storage and daytime charging, along with local voltage, phase and available roof area.

You can also compare our home solar solutions, complete off-grid systems and 10kW home solar kit. The 10kW kit is a real product example rather than a universal match for one bedroom count; your confirmed load calculation and order file set the final configuration.

Frequently asked questions

What size solar system does a 3-bedroom house need?

Our 120m², four-person model uses 8.81 kWh per day without air conditioning, 18.57 kWh with three bedroom units at night, and 22.13 kWh after adding living-room cooling. In Kingston, Jamaica, the corresponding lowest-month PV sizes are 2.42, 5.11 and 6.09 kWp. Actual air-conditioner input power, shading and backup priorities can change the result.

Is a 5kW inverter enough for a 4-bedroom house?

The basic 4-bedroom profile in this model rounds to a 5kW inverter. Four bedroom air conditioners raise the recommendation to 10kW, and the whole-home profile also uses 10kW. A large pump, electric oven or different compressor starting method can raise the simultaneous peak.

How do I choose battery capacity for a bedroom house?

Start with the appliances that must run during an outage and the required backup time. This table uses one day, 80% depth of discharge, 90% battery-to-AC efficiency and a profile-specific critical-load share, then rounds up to 5.12kWh modules. Your battery changes when any of those inputs changes.

Should I use the average or lowest-month PV size?

The annual-average column is useful for an early grid-connected energy comparison. Off-grid homes and properties with frequent outages usually place more weight on the lowest month and consecutive cloudy days. The lowest-month value is still a monthly average, so detailed design also checks hourly loads, weather patterns and battery charging.

Can I order from the 600W panel count in the table?

The table divides the lowest-month PV capacity by 0.6kW and rounds up. Before ordering, we also check the inverter's MPPT voltage and current, string count, cold-weather open-circuit voltage, roof layout and applicable electrical requirements.

Send Sunchees your load list for a project configuration

Include your country and city, bedroom and common-area sizes, appliances, air conditioners, daily running hours and required backup time. We will turn those details into a PV, inverter, battery and protection configuration for review.

Send Sunchees your load list View Sunchees projects

Data source and planning method

PV production reference: European Commission JRC PVGIS 5.3. The model uses a fixed 1kWp crystalline-silicon array, 14% system loss and a further 15% planning reserve. Household load, battery and inverter figures come from the editable Sunchees planning workbook prepared for this guide.

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*Applications

*Do you have existing solar power system ?

*How Much is Your Monthly Electricity Bill?

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*Which product are your intersted in ?(Multiple options available)

Off Grid Solar System On Grid Solar system wind Solar Hybrid system Three phase solar system Off grid Microgrid BESS Solar air conditioner Single phase solar system Lithium battery split-phase solar system

*Estimated solar system installation time

March or june or December this year or next year

*What is you occupation / position?

Solar System for a 1, 2, 3, 4 or 5 Bedroom House

Bedroom count gives a range; your appliances set the final size

PV replaces daily energy

The inverter carries simultaneous loads

The battery supports selected loads

How Sunchees turns your house details into a system design

1. Location and electrical supply

2. Appliances and running hours

3. Your backup priorities

4. We confirm the equipment and bill of materials

What size solar system does a 1-bedroom house need?

What size solar system does a 2-bedroom house need?

What size solar system does a 3-bedroom house need?

What size solar system does a 4-bedroom house need?

What size solar system does a 5-bedroom house need?

Why the same house needs a different PV array in another country

All 150 country, bedroom and usage scenarios

Which household appliances are included?

Turn the table into your Sunchees quotation

Frequently asked questions

Send Sunchees your load list for a project configuration

Data source and planning method

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