DC to DC charger
Thinking of installing a Victron charger for those days on the road when solar is not available. Can the charger be used in conjunction with an inverter (2000 watts) to run the refrigerator on electri...
Forum Discussion
How large is the LFP bank again? It sounds like the DC-DC is severely limiting the charge that could be put into even a reasonably large bank.
On a boat, where this stuff is much more advanced, you'd have an external regulator on the alternator, large cables to the house battery, and be charging them at 100A. The charge profile can be set for LFPs and is close enough that an AGM start battery will tolerate it. Even with a 160A alternator, you'd still only charge at around 100A because the external regulator has a temp sensor on the alternator, and will derate it at about 100 deg C frame temp to keep it from frying itself.
A big advantage of LFP over AGM is that its charge acceptance does not fall off rapidly as it gets close to full. It is actually that, not any ability to accept more maximum charge (often less than good AGM in similar sizes) that allows faster recharge. If you are sitting in a campsite running low and want to start the engine to charge, you want to put in 100A for half and hour, not 25A for 2 hours.
On a boat, where this stuff is much more advanced, you'd have an external regulator on the alternator, large cables to the house battery, and be charging them at 100A. The charge profile can be set for LFPs and is close enough that an AGM start battery will tolerate it. Even with a 160A alternator, you'd still only charge at around 100A because the external regulator has a temp sensor on the alternator, and will derate it at about 100 deg C frame temp to keep it from frying itself.
A big advantage of LFP over AGM is that its charge acceptance does not fall off rapidly as it gets close to full. It is actually that, not any ability to accept more maximum charge (often less than good AGM in similar sizes) that allows faster recharge. If you are sitting in a campsite running low and want to start the engine to charge, you want to put in 100A for half and hour, not 25A for 2 hours.
