YOUR POWER PLAN STARTS HERE
Let’s make this
your energy plan.
Enter your details to access the solar, inverter
and battery sizing calculator.
01 Build your appliance list
02 Explore your system size
03 Discuss your plan with JAKINSAB
PLAN YOUR POWER
A clearer picture of
your energy needs.
Build your load list. Find your starting system size.
Take the next step with confidence.
Generate. Store. Power your day.
What will you power?
Add the appliances you use on a typical day.
Example ratings are editable. Use appliance nameplates for a better estimate.
| Appliance | Qty | Watts each | Hours/day | Backup | Remove |
|---|
kWh describes energy over time.
Appliance duty cycles & starting surge ＋
Duty cycle accounts for cycling compressors. Surge is the starting power multiplier for one appliance; an engineer must confirm simultaneous starts.
Make it work for you
Set your backup target and equipment preferences.
Fine-tune sizing assumptions ＋
Built on your load list, with room to plan.
Each battery unit must match the selected bank voltage; lead-acid units represent complete series banks. This is a preliminary energy estimate. A site assessment must confirm shading, seasonal sunlight, motor starts, battery discharge current, inverter and MPPT limits, and installation requirements.
How the calculation works
Daily energy = quantity × watts × daily hours × duty cycle. Backup energy uses the lesser of each appliance’s daily hours and your backup duration, for selected appliances. This assumes that usage falls within the backup window.
Battery capacity = backup energy ÷ inverter efficiency ÷ usable depth of discharge, plus headroom. Solar capacity = daily energy ÷ inverter efficiency ÷ battery energy efficiency ÷ peak sun hours ÷ solar yield factor, plus headroom. Solar assumes one day’s energy replenished per day, with all energy passing through storage: a conservative planning case. It does not model weather or multi-day autonomy.
Inverter capacity covers all connected appliances operating together, plus headroom. kVA uses your chosen rated power factor. Starting demand assumes the single largest appliance start above the connected load. Confirm both continuous watts and manufacturer surge duration before selecting equipment.
Assumptions are editable, not location-specific guarantees. Background: Victron off-grid sizing · NREL PVWatts loss modelling.