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Posts: 1
Reply with quote  #1 
Pls I need an expert to guild me up on this site,i want to install an off grid solar system to charge 1.5kva inverter system to be charging with solar panels system in a remote farm..I want to know the size of panels to use to charge the battery always ..is it idea to use 100watts 12v solar panel or 250watt 24v ....


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Posts: 2,951
Reply with quote  #2 
Before you can size your battery or array you'll have to determine how much energy (watt-hours) you expect to use per day (or week). Ex 100w x 8 hours = 800 watt hours. Until you determine this, the rest is moot.

A 100w panel is a 100w panel (x 2 = 200w), voltage only matters in how it's hooked up. You figure out the cost (inc shipping) and order accordingly. Big 24v panels may look cheaper but the shipping can be more than the panels. Shop wisely.

Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
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