Right-Size Load Calculator | Jeffen Reds Limited

Sizing a house or an office? Use Single Home / Office. Sizing many housing units plus shared infrastructure like gates, boreholes and street lighting? Use Entire Estate.

How This Works

Below, enter the quantity you actually own for each appliance. Nigeria-typical wattages are pre-filled — edit any of them if yours differ.

Choose your city, battery type, backup days and system voltage in the result panel.

Your recommended Inverter (kVA), Battery bank (kWh / Ah) and Solar array (kWp / panels) calculate live as you type.

Use this number to check any installer's quote — or send it to us on WhatsApp for a free site visit.

Your AEDC bill tells us what you paid — not what trips your system when the AC, fridge and pump run together. A right-sized system is built from a real appliance load count, not a bill.

Appliance Load Count

Appliance	Watts	Qty	Hrs/Day	Surge x	Running (W)	Daily (Wh)
TOTAL					0 W	0 Wh

Your Sizing Result

The one honest number to check any installer's quote against.

City / Location

Recommended Inverter

—

Backup Days

System Voltage

Battery Type

Recommended Battery Bank

—

Panel Wattage (each)

Recommended Solar Array

—

Send My Result & Book a Free Site Visit

No obligation — we'll confirm this number on-site.

Estimate only. Final design should be confirmed on-site — wiring condition, roof orientation, shading and local voltage stability can all shift the final number.

How Estate Sizing Works

Enter how many of each housing type your estate has. Typical Nigerian household loads are pre-filled — edit any of them.

Enter quantities for shared infrastructure — street lights, gate automation, boreholes, the estate office and more.

You get a recommended kit per unit type, a recommended system for shared infrastructure, and an estate-wide total for budgeting.

Send your estate plans and this result to us on WhatsApp for a free review — no obligation.

In practice, an estate is rarely powered by one giant central plant. The realistic model is a right-sized kit per housing unit, plus a separate system for shared infrastructure — which is exactly what this tool sizes.

1. Housing Unit Types

Enter the number of units for each type. Load and surge figures are Nigeria-typical estimates — edit any of them, including the Custom row.

Unit Type	Units	Load/unit (W)	Daily/unit (Wh)	Surge x	Inverter each	Battery each	Panels each
TOTAL UNITS	0

2. Shared Estate Infrastructure

Item	Watts	Qty	Hrs/Day	Surge x	Running (W)	Daily (Wh)
TOTAL					0 W	0 Wh

3. Your Estate Result

The estate-wide budgeting number to check any installer's or contractor's quote against.

City / Location

Battery Type

Backup Days

Panel Wattage (each)

Residential (sum of every unit's own kit)

Inverter capacity, all units 0 kVA

Battery capacity, all units 0 kWh

Solar panels, all units 0

Shared / Common-Area System

Recommended inverter 0 kVA

Recommended battery bank 0 kWh

Recommended panels 0

Estate-Wide Totals

Total Inverter Size — one system, sized from total load + surge

—

Total battery capacity needed 0 kWh

Total solar panels needed 0

Total solar array 0 kWp

The inverter total above uses the estate's total load and surge — it is not simply a sum of each unit's rounded inverter size, so it won't match that figure exactly. Battery and panels ARE summed per unit, since each house needs its own bank and array.

Send My Estate Result & Book a Free Review

No obligation — bring your unit schedule and we'll confirm this with you.

Estimate only, for planning and quoting. Final design should be confirmed on-site and against your actual unit mix and phasing — grid stability, cable runs, roof orientation/shading and phased handover can all shift the final numbers. This is separate from the Single Home / Office calculator above — use that one for an individual house.