New user here, have a simple question. My setup is 3 x 100w PV panels in series. Own a SmartSolar 100/15 MPPT controller and a single 12v LiFePO4 100AH battery. My controller output to battery is maxing out at 15A in good sunshine causing loss of potential gathered energy. Instead of getting a larger MPPT controller, I was thinking of adding a 2nd 12v battery - wiring in series for 24V. The Victron spec sheet shows the max output remains 15A for both 12v and 24v loads - is this correct? Are there disadvantages to doing this to get maximum harvest from my PV panels?
No, if you have use for 24v and don’t forget to add a balancer…
You are right that the charger outputs 15A max at either 12 or 24V so 180W or 360W nominal.
No downsides, just make sure your panels can generate sufficient voltage to start the MPPT which is battery +6V (approximately).
No??? is that for there is No disadvantage or No in don’t do it??? Why would I need a balancer as long as the two batteries were identical mfr / make / model / specs? The built in battery BMS should handle the cell balancing during absorption right?
A properly working BMS does not need balancers, depends on the quality of the battery. Some actually ask for it.
See my post re clarification.
No
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