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How to make your own home solar. With Pictures + solar book
- Thread starter awinahe
- Start date
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Solar Car Racing Game
Source: http://tryengineering.org/play-games/solar-car-racing-game
A solar car is a vehicle which is fueled by the sun's energy. Photovoltaic cells in solar panels on the surface of the car convert the sun's energy into electricity. This electricity is then used to run the battery that powers the car's motor or to power the motor directly. Most solar cars are developed for the purposes of racing, due to the present challenges and limitations of using solar energy as a reliable source of vehicular power.
In this challenge you will virtually design and race a solar car.
... share ko lang...
Source: http://tryengineering.org/play-games/solar-car-racing-game
A solar car is a vehicle which is fueled by the sun's energy. Photovoltaic cells in solar panels on the surface of the car convert the sun's energy into electricity. This electricity is then used to run the battery that powers the car's motor or to power the motor directly. Most solar cars are developed for the purposes of racing, due to the present challenges and limitations of using solar energy as a reliable source of vehicular power.
In this challenge you will virtually design and race a solar car.
- Select components of your solar car such as the body, battery and tires to optimize performance.
- Race your car in a desert and a racetrack environment and see how it performs.
- Modify your design based on feedback and performance and race again!
... share ko lang...
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Sir ask ko lang for 12V system
alin ang mas ok? 3pcs 100watts 18v 5a (parallel so magkkaron ng 15A?)
or
yun 1pc 280watts 31.6V 8.87A
sa pagkakaintindi ko sir mas ok yun 3pcs kasi magtototal ng 15A lahat versus dun sa 280 watts na 8.87A lang.
alin ang mas mabilis magcharge sir? im using 20A mppt. im planning to make another setup kc.
alin ang mas ok? 3pcs 100watts 18v 5a (parallel so magkkaron ng 15A?)
or
yun 1pc 280watts 31.6V 8.87A
sa pagkakaintindi ko sir mas ok yun 3pcs kasi magtototal ng 15A lahat versus dun sa 280 watts na 8.87A lang.
alin ang mas mabilis magcharge sir? im using 20A mppt. im planning to make another setup kc.
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- Thread Starter
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I copy/paste the answer I gave you in PM... it can be useful for those who don't know!
the answer is easy: 1 pc 280 watts panel is only to be used with 24 or 48 volts system! So for a 12 volt system you need to connect in parallel several smaller panels.... Usually panels above 200 watts are made for 24/48 volt system.
Regarding the charging time it depends also on how many batteries you have. With 3 x 100 watts of panels + controller you can have a maximum of 300 Ah of batteries if you want them to be recharge everyday (as long as you don't discharge them more than 50% of their capacity)
"alin ang mas mabilis magcharge sir? im using 20A mppt. im planning to make another setup kc." - ma'am ahmish
... depende sa brand ng MPPT scc... nakasulat naman sa specs kung ano ang required na solar panel na dapat gamitin... yung mura na mppt scc ay para lang sa 12V-24V panel, samantalang ang mahal na mppt scc ay recommended sa mga high voltage panel (aka grid-tied panels)... ano ba ang brand ng MPPT scc mo para ma-search natin sa internet?
... depende sa brand ng MPPT scc... nakasulat naman sa specs kung ano ang required na solar panel na dapat gamitin... yung mura na mppt scc ay para lang sa 12V-24V panel, samantalang ang mahal na mppt scc ay recommended sa mga high voltage panel (aka grid-tied panels)... ano ba ang brand ng MPPT scc mo para ma-search natin sa internet?
base sa mga nabasa ko, wala masyado isyu kapag pinarallel ang isang mono sa isang poly with same rating/specs... (kung series connection, dapat ay parehong-pareho sila).
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hi sir!, ang brand po ng MPPT ko eh EPEVER TRACER
... ito ang na-research ko sa internet regarding.... Epever Solar regulator MPPT Tracer
SPECS:
Max. PV input power:260W/12V 520W/24V
Max. PV VOC:100V
Maximum Current:20A
... gusto mong gamitin ay 280W to 300W panel sa 12V system... hindi ko sigurado kasi sobra ka ng kaunti kapag malakas ang sikat ng araw.
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Plan ko kasi mag upgrade. bibili ulit ako ng 40A na EPEVER Tracer at bibili ako ng 4 pcs 100 Watts Mono Panel. kaya nagask ako kun mas ok ba yun kesa bumili ako ng higher panels
kung 40A Epever MPPT Tracer naman ang gagamitin mo, ito ang specs:
SPECS:
Max. PV input power:520W/12V, 1040/24V
Max. PV VOC:100V
Maximum Current:40A
... therefore, pwede gamitin ang 4pcs 100W mono panel...
IMO, mas advantage kung series connection dahil tataas ang voltage
4x18V=72V, pasok sa specs na 100V...
400W/12=33.3A, pasok sa specs na 40A (formula: Panel Wattage / Battery Voltage = MPPT Output Current)
mas ok ba yun kesa bumili ako ng higher panels?
according to the specs of 40A Epever MPPT Tracer, you need 520W panel with Max PV VOC of 100V (series connection)... tanong ka sa mga sellers kung saan ka makakatipid... 5x100W or high voltage panel example 2x260W?
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diba sir pag series connection tataas lang yun volts pero same pa din 100 watts? while pag parallel naman same volts pero tatatas yun watts
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ganito sir... kunyari may 2 tayo na solar panel 100w ang rating ng kada panel ay 17.4v @ 5.76amps
pag parallel ang connection natin 17.4v pa din pero yung magiging current is 11.52amps
pag naman series ang connection 34.8v pero yung current 5.76amps
pero kung titingnan natin parehas pa din na 200w ang total nila parallel o series na connection
sa series P=E*I power= voltage * current
power= 34.8v * 5.76amps = 200.448w
sa parallel naman P=E*I power=voltage*current
power= 17.4v*11.52amps =200.448w
eto eh kung accurate ang specs ng panel at kung ano ano pang pwedeng maka apekto sa pa panel...
ma'am ahmish... pag series, tataas ang volts per0 same pa rin ang AMPERES... while pag parallel same pa rin ang volts pero mag-a-add (tataas) ang AMPERES... at tama din ang paliwanag ni sir wamiruk...
pero add ko rin na magka-iba ang output current ng PWM versus MPPT scc.
kung real MPPT scc (hindi fake mppt) ang formula ay:
Panel Wattage / Battery Voltage = MPPT Output Current
meaning... ang current na lalabas sa MPPT scc ay magde-depende sa battery voltage, halimbawa...
400W / 12V (meaning discharge na ang battery) = 33.3A ang output current ng MPPT
pero, kung fully charge na ang battery, example 400W / 14.2V = 28.16A ang output current ng MPPT
lagyan mo ng load, note na bababa ang battery voltage, example 400W / 12.5V = 32A ang output ng MPPT with load
pero, pansinin mo ang power ng panel... hindi nagbabago:
12Vx33.3A=400W
14.2Vx28.16A=400W
12.5Vx32A=400W
yan ang advantage ng MPPT scc, tumataas ang Output Current kung mababa ang battery voltage (big advantage if charging while running a load)... samantalang kung PWM scc, kung ilang amperes ang pumasok sa kanya galing sa panel, yun din ang lalabas sa kanya, halimbawa... 400W/18V=22.22A maximum output current ng panel... 22.2A din ang PWM output current... as compared to 33A of an MPPT
in short kung parehong 400W ang panel...
22.22A ang output current kung PWM scc
33A ang output current kung MPPT scc (or 32.7% better)... big difference, di ba?... ito ang dahilan kaya mas expensive ang MPPT
pero add ko rin na magka-iba ang output current ng PWM versus MPPT scc.
kung real MPPT scc (hindi fake mppt) ang formula ay:
Panel Wattage / Battery Voltage = MPPT Output Current
meaning... ang current na lalabas sa MPPT scc ay magde-depende sa battery voltage, halimbawa...
400W / 12V (meaning discharge na ang battery) = 33.3A ang output current ng MPPT
pero, kung fully charge na ang battery, example 400W / 14.2V = 28.16A ang output current ng MPPT
lagyan mo ng load, note na bababa ang battery voltage, example 400W / 12.5V = 32A ang output ng MPPT with load
pero, pansinin mo ang power ng panel... hindi nagbabago:
12Vx33.3A=400W
14.2Vx28.16A=400W
12.5Vx32A=400W
yan ang advantage ng MPPT scc, tumataas ang Output Current kung mababa ang battery voltage (big advantage if charging while running a load)... samantalang kung PWM scc, kung ilang amperes ang pumasok sa kanya galing sa panel, yun din ang lalabas sa kanya, halimbawa... 400W/18V=22.22A maximum output current ng panel... 22.2A din ang PWM output current... as compared to 33A of an MPPT
in short kung parehong 400W ang panel...
22.22A ang output current kung PWM scc
33A ang output current kung MPPT scc (or 32.7% better)... big difference, di ba?... ito ang dahilan kaya mas expensive ang MPPT
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mga sir, salamat po sa pagtulong naiintindihan ko na. maraming maraming salamat po
mga ma'am/sir ano po ba pwede ko gawin, kasi po yung mga 12VDC LED ko po na bulb, nagpi-flicker pag naka floating charge na ang scc, connected po ang bulbs directly sa "load" terminal ng scc, sakit po ba talaga ito ng mga PWM? sinubukan ko na po maglagay ng parallel na capacitor (1000uf 16v) sa LED pero either ma trip nya lang po ang over-load ng scc or totally wala syang effect(may flicker parin).
yung mga 12VDC bulbs ko ay sa "load" terminal din ng scc naka-connect, pero wala naman flicker (running from 6PM to 6AM at ang ginagamit ko na scc ay Epsolar at Lumiax).... baka loose or faulty connections lang... if the wiring is outdoor, check if E27 bulb socket and wire are corroded due to absorption of water (refer to page 454)... o baka naman yung napu-pulbos na wire ang nagamit mo (refer to page 495)... sa pagkaka-alam ko, ang cause ng flicker ng led bulb ay kung pa-putol-putol ang flow ng current.
sige po sir, check ko po, kala ko po kasi effect sya ng pagiging PWM ng scc ko eh, at talagang nagpi-flicker lang sya during float charge, pero pag bulk or wala ng output si panel, stable naman sya, at ang wire na gamit ko po from load terminal to LED is gauge 16 na speaker wire(I know, violation po yun), about 8 meters po siguro yun.
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yung lumiax scc ko ay day and night naka-connect sa isang 4W led bulb (naka-connect sa load terminal)... meaning from bulk, absorption at floating stages ay naka-connect siya, pero hindi naman nagpi-flicker.... ano ba ang brand ng scc mo?... baka depende sa brand ng scc.
View attachment 282427
bosca po, from raon
, palagay ko nga rin po sya sumira(I assume sira) sa battery ko eh, ang bilis nya mag full then pag nilagyan ng load, lo bat kagad, parang may error sa voltage reading/logic nya kaya abnormal ang charge cycle (bulk, absorption, float) sabagay, ano po naman aasahan ko sa 900php na scc, kaya ang next target ko talaga is fanpusun 100/50 or 100/30...
bosca po, from raon
, palagay ko nga rin po sya sumira(I assume sira) sa battery ko eh, ang bilis nya mag full then pag nilagyan ng load, lo bat kagad, parang may error sa voltage reading/logic nya kaya abnormal ang charge cycle (bulk, absorption, float) sabagay, ano po naman aasahan ko sa 900php na scc, kaya ang next target ko talaga is fanpusun 100/50 or 100/30...
