Re: SSR opened up to replace mosfet

Body

Hi Doug

 Sorry should had some details
 I measured the SSR's with a O-Scope and a Sig Gen..
 

 The 3 SSR's are for turning off a LiFeYP04 16 cell bank, thur a 100 amp DC breaker. With long #4 wire.

 They are only off if the voltage go's >~57 volts, as there are also 100 KWH of lead acid cells.
 

 If the Solid State Relay turns back on at 56.5 volts with no delay either the breaker protects them
 or one gets toasted..
 a 5-10 second delay works for me, It's only a small 10 KWH LiFeP04 lithium iron bank with 2x100F caps on 

 each cell as they are >2.7 volts.
 

 On a lead acid a 2.7 volt super cap works fine. I got 2 lead acid twin banks (1200 amp hour cells)
 they have 400F each on each cell, or 800F that hits the line to the LiFeYP04 cells. Thur the SSR's.
 

 So yes pure DC. Even the 100 amp breaker has gotten warm.