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Off-grid solar system for an office

Office — no utility supply on site. The load is air conditioner ×3, lights & Wi-Fi ×2, computers ×4 and kitchen (microwave & kettle). From the Voltronic catalogue the sizing takes the Axpert MAX E Duplex 11K inverter and 10 × LIO 4810 batteries (4.8 kWh each by name).

What is inside

Inverter + BatteryAED 30,584

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Solar panels9.5 kWp18 panelsInverter11 kWruns the placeBattery43.2 kWha full day + reserveOffice40.4 kWh/daywhat you use a day
How the energy moves through your system

What the records of these units say

Motors set the inverter size, not the daily total: this profile uses about 40.4 kWh a day but reaches 9.2 kW in the instant its motors start. The Axpert MAX E Duplex 11K is the unit the sizing landed on; its record gives the rated output power as “11000W”. Transfer time, as the record states it: 10ms typical (UPS);. If the load grows, the same record allows up to 6 units in parallel.

With nothing behind the battery, it is sized for a whole day of this load: about 40.4 kWh. The sizing covers that with 10 × LIO 4810 batteries (4.8 kWh each by name), counting 43.2 kWh of it as usable. Its record states: nominal voltage 48VDC, cycle life “> 4500 @ 25°C” and 44.8 kg per unit. Two rows to hold against each other before ordering: the Axpert MAX E Duplex 11K states a battery voltage of 48 VDC in its record, and this pack states 48 V nominal in its own.

Panels are bought apart from this catalogue, which lists none; the array is therefore a count: 18 panels, 9.5 kWp, figured at 5.7 peak sun hours a day. What the Axpert MAX E Duplex 11K accepts on its solar input, from its record: maximum PV power “11000W (5500W x 2)” and MPP voltage range “90 – 450 VDC”. String the panels inside those limits.

This profile includes computers, the load a UPS is bought for. 69 inverter records in this catalogue give a transfer time of 10 ms for personal computers and 20 ms for home appliances; 27 online UPS records give a transfer time of zero. The UPS models are separate listings, from AED 1,290 to AED 9,500 for the single-phase online ones.

Voltronic parts beside the inverter and the battery

None of these is in the kit above. Each is its own listing, with its own table and its own price, for the site that needs a transfer switch, remote monitoring or a separate charge controller.

Frequently asked questions

Can the Axpert MAX E Duplex 11K run this office with no utility at all?

The catalogue files it as “Off-Grid Inverter”. In this kit it has only the panels and the battery to draw on, which is why the battery is sized for 40.4 kWh rather than for a few hours. Its record gives the transfer time as 10ms typical (UPS);.

How much battery does this office kit hold?

10 × LIO 4810 batteries (4.8 kWh each by name); the sizing counts 43.2 kWh of that as usable against a need of 40.4 kWh. The pack's nominal voltage is 48VDC, and the inverter's record states a battery voltage of 48 VDC.

What is the price of the Voltronic units in this office kit?

1 × Axpert MAX E Duplex 11K at AED 2,144 and 10 × LIO 4810 at AED 2,844, AED 30,584 in all. That is the figure on each product page and the one you pay when you collect the order from our store in Dubai or Riyadh; panels and installation are outside it.

Can a second Axpert MAX E Duplex 11K be added later?

Its record states parallel operation of up to 6 units, so the inverter side can grow without replacing the first unit. Battery capacity is a separate decision, taken from the battery's own record.

Does Voltronic supply the solar panels as well?

Not in this catalogue. It lists 233 inverters, 88 UPS, 16 batteries, 20 solar charge controllers and 17 voltage regulators, and no panels. This kit needs 18 of them, about 47 m² of roof.

Other Voltronic kits: this building on another supply, and this supply elsewhere

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