EFDA Energy Hub

EFDA RENEWABLE ENERGY · V27.0.0

Renewable System Planner & Calculator

Estimate solar panels, physical array size, battery storage, inverter capacity and a preliminary project budget for homes, offices, farms and community projects.

Solar PVBattery bankHybrid systemsMicro-hydro screening

☀ Solar PV

Panel count, rated capacity and approximate roof/ground area.

🔋 Battery storage

Nominal storage and battery quantity estimate.

⚡ Inverter sizing

Continuous load and surge target.

💧 Micro-hydro

Screen theoretical power from head and flow.

1. Project and system assumptions

Start from a project templateTemplates provide illustrative starting loads; replace them with a measured appliance inventory.

Project name System configuration Daily energy demand (kWh)Can be filled from the appliance table below. Peak sun hours/day PV performance ratio (%) Panel rated power (Wp) Custom panel rating (Wp) Panel length (m) Panel width (m) Panel quantity override (optional)Enter a quantity to check the capacity of a chosen panel count. Battery autonomy (days) Battery depth of discharge (%) Battery/inverter efficiency (%) Battery round-trip efficiency (%) Peak simultaneous load (kW) Motor/start-up surge factor Battery bank voltage Battery unit capacity (kWh each)Used to estimate the number of battery units.

2. Appliance-by-appliance load assessment

Add appliances, quantity, watts per appliance and hours used daily. Daily energy is calculated as quantity × watts × hours ÷ 1,000. Use realistic average operating hours, not only nameplate power.

Appliance / equipment	Quantity	Watts each	Hours/day	Daily kWh
				0.48
				1.20
				0.78
Appliance-table daily total				2.46 kWh

3. Electrical design and component configuration

Enter values from the actual equipment datasheets. String and controller results are screening estimates; cold-weather voltage, MPPT range and current limits must be verified.

Panel open-circuit voltage Voc (V) Panel maximum-power voltage Vmp (V) Panel short-circuit current Isc (A) Panel operating current Imp (A) Controller / inverter MPPT max PV voltage (V) Controller minimum MPPT voltage (V) Controller maximum PV input current (A)Use manufacturer’s permitted short-circuit/input-current limit. Controller maximum PV array power (kW) Battery unit nominal voltage (V) Battery unit capacity (Ah) One-way cable run length (m) Design circuit current for cable (A)Use the actual circuit current; final cable selection must also satisfy ampacity and installation rules. Maximum voltage drop (%) Cable circuit voltage (V)

4. Project record and renewable-resource screening

Project records are saved in this browser only unless you export a report. Wind output is a simple capacity-factor screening estimate, not a turbine performance prediction.

Project location / site Prepared by Average wind speed (m/s) Wind turbine rated capacity (kW) Estimated turbine capacity factor (%) Design notes

5. Budget inputs and component catalogue (editable)

Use this editable planning catalogue to add indicative procurement allowances. Replace every default with supplier quotations and compatible equipment data before purchasing.

Currency code Solar PV cost per kWp Battery cost per kWh Charge controller allowance per unit Inverter cost per kW Mounting / racking per kWp Installation / balance of system per kWp Transport / delivery (%)Applied to equipment and installation subtotal. Taxes / duties allowance (%)Enter only the rate appropriate to your project. Contingency (%) Professional / design fees Other site works / permits DC/AC protection & isolators allowance Earthing, surge protection & labels allowance Monitoring / communications allowance Estimated cable & connector allowance Hydro gross head (m) Water flow (m³/s) Hydro overall efficiency (%)

Your preliminary estimate

Calculate the system to see panel quantity, physical array size, battery bank and estimated budget.

Engineering notice: Results are preliminary planning estimates, not a certified design. PV string sizing uses entered module voltages and a simplified 20% Voc cold-weather allowance; this is not a substitute for the module temperature coefficient and local minimum design temperature. Cable area is a voltage-drop estimate only and does not certify current-carrying capacity; Panel dimensions and quantities are approximate; roof setbacks, spacing, orientation, shading and access paths affect actual usable area. A qualified professional must verify load profiles, local solar resource, battery chemistry, string voltage/current limits, cable sizing, protection, earthing, structural loads, grid rules and equipment specifications before procurement or installation. Hydro output is theoretical screening and excludes detailed seasonal-flow and penstock-loss analysis.

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