Solar power supply Camping
With of the in mind I began viewing prices of elements on websites including Ebay and Maplin as price is a very important aspect in designing a solar power system. Our Liquid Crystal Display and receiver draw 2.2 Amps DC on 12 volt, energy saving illumination attracts just below 1 Amp for a 12 watt bulb while the phone/GPS chargers draw almost no energy. Using the TV for say, 3 hours per day max would equal 6.6Ah consumed, burning useful for 4-5 hours every night would eat approximately 4Ah while all of the charging of transportable devices will be around 2Ah while pumps for air-beds wouldnt run for very long therefore possibly just eating around 1Ah, totalling 13.6Ah. Deep Cycle electric batteries really should not be discharged below 50percent of their rated ability, the smaller the discharge pattern, the longer the battery can last, for that reason a battery of 30Ah would suffice. The UK obtains an average of 6 hours of sunshine during summer time, which is the time of year we go camping and replacing 13.6Ah into a battery would just take a 50W solar power approximately 5 hours to recharge.
(Watts = Voltage x Amps)
(Average solar power voltage at maximum power = 17 Volts)
(50 watts/17 volts = 2.94 Amps)
It is simpler to draw energy from an electric battery rather than change, calling for usually 10per cent more capacity to recharge than the thing that was eaten, for that reason:
(14Ah / 2.94 Amps = 4.76 hours of direct sunlight)
In a real world circumstance this can never happen considering a lot of different factors eg;
Solar panel shading,
Measurements of wiring,
Various other losses.
Therefore it's safer to make use of a larger electric battery bank, where energy can be utilized up continuously if climate the day shortly after are not appropriate efficient solar recharging to completely recharge battery pack.