What size solar inverter and battery do I need?

A solar inverter calculator that answers in model codes. The answer on this page is drawn from the Deye catalogue we stock as an authorised distributor: 122 inverters and 34 lithium batteries the calculator may choose between, every one read from its own record. Describe the rooms and how long the mains stays down, and it replies with a Deye inverter and battery by model code, what each costs in AED, and a panel count for the roof.

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What are you powering?

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How the calculator arrives at a Deye inverter and battery

The form wants two answers: which rooms and appliances have to stay on, and for how long once the mains drops. Out of them come a daily total in kilowatt-hours and the hardest moment of the day in kilowatts — a compressor or a pump starting while the rest is already running. That second figure settles the inverter. Deye's storage inverters divide by supply and by battery voltage, and each record says on which side a model falls: 15 models of single-phase hybrid in the SG04LP1, SG05LP1 and SG01LP1 lines (3–16 kW) and 3 single-phase off-grid units (OG01LP1, 3.6–6 kW) run on a low-voltage battery, while among the 34 three-phase hybrids 17 use that same battery and 17 need a high-voltage stack.

The hours settle the battery: the calculator takes the fewest Deye units that hold your consumption across the cut, repeating one model when a single unit falls short. A system with no storage — panels feeding the building while the grid is up — is matched against the 70 grid-tied string inverters instead, which span 1–136 kW. The 12 Deye microinverters we list are left out of the calculation.

Panels are the one part the answer does not name. Our Deye range is 134 inverters, 35 batteries and 7 solar air conditioners, and no panel is among them, so the array is reported as a quantity of 550 W panels plus the roof area it covers — enough to return one day's consumption in one day of sun. Switch the array off and the calculator sizes storage alone.

Each Deye model in the answer opens its own page; the figure printed there is the price of that unit. You collect what you order at our store in Dubai or Riyadh. Read the outcome as a sizing estimate. Cable cross-sections, protection devices and the utility connection belong to the licensed installer who signs the installation off in your country.

The Deye lines behind a result, and three results

Single-phase hybrids, line by line: SG04LP1 at 3–6 kW (AED 2,605–3,211), SG05LP1 at 3.6–10 kW (AED 3,280–6,135) and SG01LP1 at 12–16 kW (AED 8,055). Their records give a battery input of 40–60 V, 16 inverters in parallel at most and a PV input of 4.8–25.6 kW depending on the model. One model stands apart: SUN-3K-SG04LP1-24 is built for a 20–30 V battery, the window RW-L2.5A sits in. The off-grid OG01LP1 line, AED 2,633, shares the 40–60 V window. For a three-phase supply, SG05LP3 and SG04LP3 cover 3–20 kW on that low-voltage battery and SG01HP3 and SG02HP3 cover 5–80 kW with a battery input of 160–1,000 V.

Low-voltage batteries: 14 models at 51.2 V nominal in the AI-W, RW and SE families, 5.12–16 kWh a unit, AED 2,520–11,777. Every one of those records states more than 6,000 cycles. Depending on the model, 32–64 of them connect in parallel. High-voltage storage is 16 models in the BOS, GB, GE-F, MS, SS and WS families, 153.6–870.4 V according to the configuration. 18 models of single-phase storage inverter and 14 models of battery therefore share one voltage window.

What the calculator lands on today, computed from the same records. Apartment, 4 hours of backup: 1 × SUN-5K-SG04LP1-EU (5 kW, AED 3,211) with 1 × AI-W5.1-B (5.12 kWh, AED 2,530), beside 6 panels of 550 W over roughly 16 m² of roof. Apartment with no grid at all: 1 × SUN-5K-OG01LP1-EU-AM2 (5 kW, AED 2,633) with 1 × RW-F16 (16 kWh, AED 7,691), beside 6 panels of 550 W over roughly 16 m² of roof. House on the grid, no storage: 1 × SUN-9K-G02P1-EU-AM2 (9 kW, AED 3,675), beside 11 panels of 550 W over roughly 29 m² of roof. Change a room or an hour in the tool above and these units change with it.

Deye systems already sized, one per building

Sizing a Deye system: inverter, panels, battery

What size Deye inverter does a house need?

One rated above the hardest moment of the day, when a compressor starts while everything else is running. The apartment load peaks at 4.9 kW and lands on the SUN-5K-SG04LP1-EU, rated 5 kW, the house load peaks at 8.1 kW and lands on the SUN-10K-SG05LP1-EU-SM2-P, rated 10 kW and the villa load peaks at 11.7 kW and lands on the SUN-12K-SG01LP1-EU, rated 12 kW. Enter your own rooms above and the peak, and the model, follow them.

How many solar panels does a home need with a Deye inverter?

It scales with what the building uses in a day. Apartment: 6 × 550 W for 13.8 kWh/day, about 16 m², house: 11 × 550 W for 25.4 kWh/day, about 29 m² and villa: 20 × 550 W for 49.5 kWh/day, about 52 m². Those are the profiles' figures; your own room list moves them. The count assumes that module size because Deye — and so our range — has no panel.

What size Deye battery covers 8 hours without the grid?

The hours decide it. The apartment load sized for 4 hours installs 4.6 kWh in the AI-W5.1-B; the same load sized for 8 hours installs 9.2 kWh in the RW-F10.2. The array is the same in both cases.

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