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Home Forums General Discussion Why are off grid solar packages so expensive? Re: Why are off grid solar packages so expensive?

#65347
elnav
Member

Your list of equipment seems fairly sensible except for the amount of solar panel capacity. How did you arrive at needing 3 kilowatt. Many people fall into the trap of equating capacity of generating capacity with direct instantaneous consumption.ie. peak load.

I know of installations with 470 watt charging capacity that can supply the type of loads you describe. Admittedly contractor tools do use a lot of power but often only in bursts and for short periods. Once construction is done the demand goes way down. Probably the single largest ongoing power user is the water pump if you have a deep well pump. If you use a cisteren or water tank this demand can be scheduled and in fact a petrol generator may be more cost effective than expensive solar panels.

Air conditioning will be another big power user but you can moderate the need for actual air cconditioning with suitable house design and construction.

I am not personally familiar with western Australia conditions but other locations with smilar climatic conditions have found workable solutions.

I was asked to make a proposal for an off grid complex in Mexico that had similar conditions. It can be done.