开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

Thunderstruck 10kw sailboat kit battery stuck


Anton Sl-y
 

Hello,

Last year I got the Thunderstruck sailboat 10kw conversion kit with it worked?great!


One problem — the battery charge indicator seem to not want to reset.? I know for sure my batteries are fully charged but the indicator showing seemingly the last value it had when we last went out last season (currently showing 80% which is what we ended the last sail on).

Would anyone know if I need to reset it someone after every trip?

TIA!

Anton
--
Best Regards,
Anton Slutsky, Ph.D.


 

Most of these state of charge meters need a voltage threshold to reset to 100%. On my boat this seems to be about 58 volts. The problem I have is the controller needs to see this voltage, I have to turn on the controller soon after my pack is fully charged for it to reset, if I wait too long my battery voltage drops a bit and it does not reset.


Anton Sl-y
 

Interesting thank you Brian!? I have a 4x12 lead acid batteries.? I don’t think they ever give me more than 55 even when fully charged. ?

Maybe I need to turn in the controller with charger on.? Charger gives me ~58v

On Mon, May 15, 2023 at 9:18 AM Brian <mainfuse@...> wrote:
Most of these state of charge meters need a voltage threshold to reset to 100%. On my boat this seems to be about 58 volts. The problem I have is the controller needs to see this voltage, I have to turn on the controller soon after my pack is fully charged for it to reset, if I wait too long my battery voltage drops a bit and it does not reset.

--
Best Regards,
Anton Slutsky, Ph.D.


 

Antonio,
Call Thunderstruck. They actually talk to their customers and are great folks.
Cheers,
Ric


 

You didn’t mention what state of charge meter you are using or where you are measuring it. Most will operate on a loosely tracking voltage to capacity curve and most have a calibration procedure to tell them what voltage is 100%.