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UID:c914b8f1-9f4e-4888-8f0e-4d1e9ec1a79f
DTSTAMP:20260518T083938Z
SUMMARY:Off Grid CS6P-250 x 14 panels
DESCRIPTION:We have inherited an old Canadian PV system with a small holdin
 g in East Anglia UK. The present setup comprises 14 panels\, each CS6P-250
  type. Wired 7S2P to a junction box on panels\, then fed to MPPT epever ET
 6415BND 60 Amp controller. 8 batteries in 4S2P configuration\, each 115 AH
  12 volt.  Inverter Pure Sine Wave power inverter unbranded.\nPanels read 
 110 volts at the junction box and 107.5 volts at the MPPT controller termi
 nal ( Via isolator) This was tested in the morning in bright sunlight but 
 only at 4 degrees C. Previous reading Full midday sun October 22nd sunshin
 e gave 136 volts at the junction box on the rear of panels.\n\nBatteries a
 re 2017 and read 8 volts at best. MPPT is not powering up and is possibly 
 dead due to a lack of ventilation in the shed where housed ( Hot summer in
  2022 would have reached over 40 degrees C ) Or could be Voc breaching 150
  volts?\n\nLoad is only a small shop with a total of 10 LED lights\, a til
 l\, and a weighing machine. Some power at socket outlets is needed to char
 ge phones and mobile camping lights for the evening—maximum load 500 wat
 ts which would be required in low light conditions or evening for six hour
 s. \n\nMy questions/queries are:\n\n14 Panesl would appear an overkill at 
 present.\nVoc may approach 150-volt maximum .( Given a winter sunny mornin
 g at minus 5 Degrees C )\, Thus killing MOSFETS?\nThe battery arrangement 
 seems too light\, given amount of panels.\nIf I charged the dead batteries
  charged at home\, could I at least prove the rest of the system works pri
 or to spending more than 2000 pounds on new batteries?  Or is it like inhe
 riting a stately home\, which will cost us more and more every year?\n\nTh
 e picture shows the shed contents as inherited.\n\nDoes anyone have any go
 od advice please\nMarrp
URL:https://www.solarpaneltalk.com/node/437944
DTSTART;VALUE=DATE:20230216
LOCATION:Suffolk UK
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