I agree as long as you have a long history with the battery/BMS. Since
all of this is so new or constantly changing I would add a class T as it
has a minor chance of being a failure item.
When I was testing this for Schneider, even they added the T fuse for
insurance as no-one had tested the internal T fuse and contactor. Cheap
insurance.
Dave Angelini Offgrid Solar
"we go where powerlines don't"
[2]https://offgridsolar1.com/ [3] [2]
e-mail offgridso...@sti.net
text 209 813 0060
On 2025-07-14 10:12 pm, William Miller via RE-wrenches wrote:
Friends:
When I design a lead-acid battery system I decide if I need
over-current protection right at the battery or not. My logic is: if
the leads are short, don't go through a wall and are well protected, I
can rely on OCPD in the BOS cabinets. If any of these criteria is a no
I put appropriately rated class T fuses right at the battery.
I'm thinking that since BMS devices have over-current protection
baked-in, fusing at the battery would not be necessary for BMS equipped
batteries in any case. Do you agree with that premise?
William Miller
Miller Solar.com
805-438-5600
www.millersolar.com [1]
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