Скачать или смотреть Solar Panels Calculation to Run a Fridge

To calculate the solar panel system needed to run a fridge and its cost in the USA, follow these steps:

1. Determine Fridge Power Consumption

Check your refrigerator's energy label or user manual to find its power usage. On average:

Small fridge (mini-fridge): ~100-200 kWh/year (~0.3-0.5 kWh/day)

Standard fridge (15-20 cu ft.): ~300-600 kWh/year (~0.8-1.6 kWh/day)

Large fridge (side-by-side, 25+ cu ft.): ~600-800 kWh/year (~1.6-2.2 kWh/day)


For example, if your fridge consumes 1.2 kWh/day, you'll need a solar system to generate at least that amount.

2. Solar Panel Requirement

Solar panels produce about 300-400 watts per panel in optimal conditions. On average, a 350W solar panel produces about 1.4-1.8 kWh/day (assuming 4-5 peak sun hours).

So, for a fridge consuming 1.2 kWh/day, you'd need at least 1 solar panel (350W) in a sunny location.

3. Battery Storage (Optional for Night Use)

A 12V 100Ah lithium battery stores about 1.2 kWh, which can power the fridge overnight.

If you want one full day of backup, a 1.5-2 kWh battery (150Ah or more) is recommended.


4. Inverter Requirement

Most refrigerators need 120V AC, so you'll need an inverter (~500-1000W) to convert solar DC power.


5. Estimated Cost

6. Savings and ROI

Electricity cost in the USA: $0.12-$0.25/kWh

A fridge using 1.2 kWh/day costs about $5-$10/month in electricity.

Over 10 years, solar can save $600-$1,200+ in electricity costs.


Would you like a more detailed calculation based on your exact fridge model?