Firefly Voltages to SOC

[mitiempo]

Originally Posted by zboss

The manual for firefly says that you should set your "return to bulk" at 12.00 volts and that float can be detrimental but as far as I know I can't turn off float on any of my charge sources (balmar 614, victron solar, wind gen).

The Balmar MC-614 has full voltage adjustment.

You can also adjust everything on any Victron MPPT controller as below:

[john61ct]

As long as you have separate charging buss from distribution to loads, and

a load dump for alts and wind gen

a protective "BMS" based on LVD and OVD relays can isolate the bank from charge sources

rather than relying on the source regulation

Or the charging can go to a cheap lead batt like a starter, and only charge the FF bank from a DCDC charger like Sterling batt-to-batt.

I'm not saying such measures are required with FF as they would be with LFP, but if you're setting up a system from scratch and want to optimize. . .

[john61ct]

​Blue Sky 3000i can set Float to OFF

[zboss]

Originally Posted by john61ct

As long as you have separate charging buss from distribution to loads, and

a load dump for alts and wind gen

a protective "BMS" based on LVD and OVD relays can isolate the bank from charge sources

rather than relying on the source regulation

Or the charging can go to a cheap lead batt like a starter, and only charge the FF bank from a DCDC charger like Sterling batt-to-batt.

I'm not saying such measures are required with FF as they would be with LFP, but if you're setting up a system from scratch and want to optimize. . .

Since I had all the batteries out I completely redid my whole buss and put the solar and wind on a charge buss and separated out the large loads from the small loads (large load buss feeds the small load buss). I had not thought about doing the alt and the shore charger on the charge buss I was building but that is a great idea. For me it would be a matter of moving them over to the new charge buss but I would have to extend the cables... not an issue because I could use something like this between the bulkheads and then not worry about changing out the whole cable...

https://www.bluesea.com/products/220...ds_%5BBlack%5D

or

https://www.bluesea.com/products/cat...Dual_PowerPost

[john61ct]

Yes I see a given charge buss as being point of entry for that bank for all sources. Just make sure voltage sense and temp sense go directly to the batt itself.

If I had more than one load buss I would separate those essential for travel from auxiliary, have a much higher LVD cutout for the latter.