Tools

Solar Inverter Size Calculator Pakistan

Pick the appliances you want to run at the same time and see the inverter size you need, the standard size to buy, the panels it can take and what it costs. Reviewed 6 October 2026.

Inverter size needed

2.9 kVA

Buy a 3 kW inverter

Continuous load with a 1.25× margin, or the load while the biggest motor starts, whichever is larger. Prices are October 2026 retail.

Running load	2,114 W
With 1.25× margin	2,643 W
While the biggest motor starts	2,864 W
Standard sizes	11.5233.656810 kW
Panels it can take (hybrid)	3.9 kW
Estimated price, 3 kW hybrid	PKR 135,000
On a 10-month Oraan plan	PKR 16,335/month
On a 5-month Oraan plan	PKR 29,835/month

How Oraan instalments work

Estimate from rated wattages and current prices; your quote may differ.

How the inverter size is worked out

Add up the running watts of everything that will be on at once. Then two checks:

Continuous: running load × 1.25. An inverter run at its limit overheats and derates, especially in summer.
Motor start: running load + the extra drawn by the single largest motor as it starts. A fridge compressor pulls about 3× its running watts for a moment; a 750 W water motor about 3×; an inverter AC soft-starts at about 1.5×. Only one starts at a time in practice.

The larger of the two, in kVA, is the figure at the top. The recommendation is the next standard size up from it. For the default picks: 2,114 W × 1.25= 2,643 W, against 2,864 W at motor start, so 2.86 kVA and a 3 kW inverter.

Hybrid inverter prices by size, October 2026

Size	Price range	Mid-point used	Examples
1 kW	PKR 49,000 – PKR 71,500	PKR 55,000	no 1 kW hybrid on sale; the 1.6 kW Fronus PV2200 (49,000) is the smallest
1.5 kW	PKR 49,000 – PKR 71,500	PKR 60,000	sold as 1.6 kW: Fronus PV2200 49,000, Inverex Veyron II 1.6 71,500
2 kW	PKR 59,000 – PKR 95,000	PKR 77,000	sold as 2.6 kW: Fronus PV3200 59,000, Inverex Veyron II 2.6 95,000
3 kW	PKR 73,500 – PKR 195,000	PKR 135,000	Homage Apex 3.2 73,500, Tesla HLE 3 130,000, Inverex Nitrox 3 195,000
3.6 kW	PKR 75,000 – PKR 215,000	PKR 145,000	SolarMax Solon 75,000, Crown Xavier 128,000, Inverex Nitrox 3.6 215,000
5 kW	PKR 87,000 – PKR 235,000	PKR 160,000	Inverex Yukon II 5.6 87,000, Fox 4.6 161,000, Crown Xavier 5.6 165,000, Growatt SPH5000 235,000
6 kW	PKR 93,000 – PKR 295,000	PKR 200,000	Tesla HLE 6 170,000, Knox Krypton 180,000, Fox H1 185,000, Solis and Growatt 250,000, Inverex Nitrox 6 266,000
8 kW	PKR 217,900 – PKR 415,100	PKR 290,000	Homage 8.5 217,900, Fox KH8 265,000, Knox 8.5 265,000, Tesla HSC 8 380,000
10 kW	PKR 335,000 – PKR 790,000	PKR 410,000	Fox KH10.5 335,000, Growatt 380,000, Solis 390,000, Sungrow SH10RS 395,000, Inverex Nitrox 10 430,000

Ranges are the lowest and highest listing we found for a hybrid inverter at that size; the mid-point is what the calculator uses. Hybrid means it runs the home from panels, battery and grid together; a plain backup (UPS-type) inverter at the same size is cheaper but cannot take panels.

What this calculator cannot know

Your inverter's surge rating. Most hybrids tolerate 2× their rating for a few seconds; some cheaper units tolerate less. The datasheet decides.
Single or three phase. Above 8-10 kW many homes in Pakistan need a three-phase connection and a three-phase inverter.
Future loads. If an AC or a second fridge is likely in a year or two, size for it now; replacing an inverter costs more than the step up.

For the battery to run the same appliances when the grid is off, use thebattery backup calculator; for the panels, the panel price table and thesystem size calculator.

Sources: K-Electric energy consumption calculator · GFC 56" Fanoos ceiling fan · Philips LEDbulb 12 W (Signify) · Samsung 43" T5300 LED TV · PEL PRGD-22260 refrigerator · Gree GS-18PITH11G 1.5 ton inverter AC · Haier HSU-18HFMCE 1.5 ton inverter AC · TP-Link Archer C6 router · INGCO JPS075082 1 HP water pump · Anex AG-1076B dry iron · Dawlance DW-131HP microwave · Victron Community: inverter sizing for a fridge · toolsfluent solar inverter size calculator (Pakistan) · Inverex official shop · w11stop.com Inverex hybrid inverters · w11stop.com Fronus PV2200 / PV3200 · w11stop.com Tesla HLE 3 kW / 6 kW, HSC 8 kW / 10 kW · w11stop.com Fox ESS 4.6 / H1 6 / KH8 / KH10.5 · w11stop.com Solis 6 kW / 10 kW LV hybrid · w11stop.com Growatt SPH5000 / SPH6000 / 10 kW · w11stop.com Knox Krypton 6.5 / 8.5 kW · w11stop.com Homage Apex 3.2 / 6 / 8.5 kW · w11stop.com Sungrow SH10RS · w11stop.com Crown Xavier 3.6 / 5.6 kW · w11stop.com SolarMax Solon Dual 3.6 kW

Common questions

What size inverter do I need for a 1.5 ton AC?

A 1.5 ton inverter AC draws about 1,500 W rated. On its own with a 1.25× margin that is 1.9 kVA, so a 2 kW inverter is the minimum. With the fans, lights, fridge, laptop and router most homes run alongside it (the default picks here), this page comes to 2.9 kVA and recommends 3 kW. Two ACs need 5 kW.

Why is the inverter bigger than my total watts?

Two reasons. An inverter should not run flat out, so we add a 1.25× margin to the continuous load. And motors draw several times their running watts for the first fraction of a second as they start. The calculator checks both and takes the larger: with a 750 W water motor at 3× surge, the start case is 4,364 W for the default picks, so the recommendation is 5 kW when you add one to the default picks.

Is kVA the same as kW?

Not in general: kW is real power and kVA is apparent power, and the ratio is the power factor. In practice the hybrid inverters sold in Pakistan (Inverex, Solis, Growatt, Fox and the rest) quote their output in kW at unity power factor, so a "5 kW" unit is 5 kVA. Some older off-grid units are rated in kVA at a 0.8 power factor, which means a 5 kVA unit only gives 4 kW; if yours is labelled that way, go one size up.

How many panels does my inverter take?

A hybrid inverter can take more panel capacity than its AC rating because panels rarely produce their nameplate watts at once. Most makers allow 1.3-1.5× DC oversizing, and this page uses 1.3×: a 5 kW inverter matches about 6.5 kW of panels, roughly 12 panels of 585 W. Check the inverter's datasheet for its maximum PV input before buying panels.

What does a 5 kW hybrid inverter cost in Pakistan?

In October 2026 Pakistani retailers listed 5 kW hybrid inverters at PKR 87,000 to PKR 235,000, with Inverex Yukon II 5.6 87,000, Fox 4.6 161,000, Crown Xavier 5.6 165,000, Growatt SPH5000 235,000. This page uses a mid-point of PKR 160,000, which on a 10-month Oraan plan is PKR 19,360 a month. Prices move with the rupee and with stock, so treat the figure as a guide and get a dated quote.

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