Here is a simple flow chart.
Budget-->Energy Audit-->Battery bank size-->number of watts-->PWM or MPPT. What ever type of controller is chosen, make sure it has adjustable set points and a temperature probe that is on the battery.
One rule of thumb is between 60 and 150 watts of panels per 100 amp-hours of storage. The smaller the battery bank the higher the wattage needed (per 100 amp-hours). Here is a link to the rather special spreadsheet which includes an energy audit, that N8GS has created to help size solar battery charging systems!
Solar Spread Sheet by N8GS6 hours of TV = 180 watts
Controller = there are several excellent models
232 amp hour battery bank = between 140 and 348 watts of panels
wind turbine = storage and noise issues
sunelectric and solarblvd and (sometimes) amazon or ebay
running an absorption fridge on 120 volt setting = 600 watts of panels
running the furnace on a 50% duty cycle = 250 watts of panels
232 amp-hours is a small battery bank for boondocking. I'd recommend 350 watts of panels. Consider increasing the storage capacity.
My biggest mistake was not allowing for my solar farm to grow--so in order to do so I'll have to replace and upgrade the charge controller. That will cost more that 33% of total upgrade price.
You don't mention an inverter. Unless the Television is 12 volt you may need one. I'd suggest 300 watts.
I hope to upgrade to 1320 watts from what I have now (256 watts). My system behaves exactly as I designed it. However, I had not contemplated full time in it--so it no longer meets my needs.
brad2504x4 wrote:
Hello I am seeking information from those that have these installed. How many panels/watts do you need for the load your using?
What controller do you recommend?
I will be using 2 - 6 volt batteries, which ones do you recommend?
Wind turbine a good idea?
Where can i get the best prices? (money is the issue as always lol)
I have already swapped too led lights which will save me a lot.
Also use a led TV for 2-6 hours a day.
And I have a catalytic heater to avoid much furnace fan operation.
Would like to use the furnace if the solar panels can keep up with usage, would like to run the fridge on electric as well if it can handle it, if not no big deal.
Looking forward to everyone's experiences and advise :)
