17/08/2026
A customer came into us 5 years ago , supplied us mostly Renogy products to install into a VW Krafter , it was almost a blank canvas and it was in for 2 x 100 a/h batteries , a 3000 watt inverter , 40 amp solar regulator and dc-dc charger .
The job left and we didn’t hear from the customer till this year, life got in the way , the camper never got completed and was only used a few times .
It sat for some time and then had issues with the electrics, initially diagnosed as a faulty inverter/ charger it quickly became apparent that the batteries would not accept charge .
Rather than tell the customer the batteries needed replacement i decided to investigate further as these batteries could be opened and the bms accessed unlike many others that are sealed shut.
When bypassing the bms the 4 cells measured at only 1.8 volts , puzzling because that is what the bms is supposed to prevent.
I took a punt and made a link to connect a small 8 amp charger directly to the cells and trickle charged them for a few hours closely monitoring voltage and temps .
Once the cells were up over 12 volts i reconnected the bms and connected a 40 amp lithium charger to the battery.
To my surprise the batteries recovered and behaved normally , we refitted everything and it all tested without issue .
This is part of what we do that i believe separates us from many other places, it would have been easy to sell the customer 2 new batteries and get sales and thats what the majority of places would have done .
This vehicle is now for sale , its a great project for someone to complete , it could be an awesome camper when finished .