Differences

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--- electrical:12v:alternator_charging_hvd [2020/10/11 23:48]
127.0.0.1 external edit
+++ electrical:12v:alternator_charging_hvd [2022/07/31 04:33] (current)
frater_secessus [solid state isolators]
@@ Line 32: / Line 32: @@
 ===== solid state isolators =====
-Some solid state isolators have a trigger or exciter input;  drive with HVD as with solenoids and relays.
+It is unlikely you will need an HVD with a diode-based isolators because:
+   - the isolator can't backfeed voltage back to the starter battery, and
+   - voltage drops up to 1v in the diodes when passing alternator --> isolator --> house bank
+But it is theoretically possible alternator voltage is so high that even with the drop you might want an HVD.  Some solid state isolators have a trigger or exciter input;  control with HVD as with solenoids and relays.
 Three lug isolators without exciter input might not be usable with HVD.

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