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Running small freezer off solar ?


CompairHolman

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Anyone running a small freezer off only solar power that can give us some real idea of what capacity of solar runs what size freezer in the winter months.

 

We have 460 w of solar, and a small 50 litre ? 240 v freezer which I think is 45 w ? ( I'm going to bond 50 mm insulation board to it to get more efficiency and keep it in my cratch space in the cold ) I don't have the money to buy a 12 v one . Our mooring faces west over open Fields with trees behind to the east.

 

 

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During the Winter Solar may (at a push) charge your phone, it will certainly not run a Freezer.

 

As an average (over 5 months of Winter) I have, at best, achieved 5% of the rated output on my panels (that includes weeks of cold, dry and cloud free weather), so taking 5% of your 460 watts you will have an effective 23 watt panel.

 

Call that about 1.5Ah at 14v

 

Say 6 hours per day (9:00am to 3pm) that'll give you about 9Ah per day

 

Your freezer will use about 30-40Ah per day (depending on model, insulation, number of times you open the door etc)

Edited by Alan de Enfield
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3 hours ago, CompairHolman said:

Anyone running a small freezer off only solar power that can give us some real idea of what capacity of solar runs what size freezer in the winter months.

 

We have 460 w of solar, and a small 50 litre ? 240 v freezer which I think is 45 w ? ( I'm going to bond 50 mm insulation board to it to get more efficiency and keep it in my cratch space in the cold ) I don't have the money to buy a 12 v one . Our mooring faces west over open Fields with trees behind to the east.

 

 

The big problem may be avoiding idle losses from the inverter.

 

Probably could run a counter top freezer as a high efficiency fridge though.

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4 hours ago, CompairHolman said:

Anyone running a small freezer off only solar power that can give us some real idea of what capacity of solar runs what size freezer in the winter months.

 

 

Given solar in winter delivers approx 0.1% of summer output, and given 500W of solar comfortably runs a freezer in summer, my arithmetic suggests 50kW of solar will suffice in winter. 

 

Hope that helps.

 

 

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6 minutes ago, Mike the Boilerman said:

 

Given solar in winter delivers approx 0.1% of summer output, and given 500W of solar comfortably runs a freezer in summer, my arithmetic suggests 50kW of solar will suffice in winter. 

 

Hope that helps.

 

 

Eh? Maths was never my strong point. 

  • Greenie 1
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