@GlenLover Worth mentioning something nobody's touched on yet — low-light performance degrades significantly with partial shading, even minor stuff like frost patches or lichen buildup on the cell...
@LazyBodger I'd push back on this slightly. Your Multiplus-II's quiescent draw is what, 11-15W at idle?
in Q&A
5 months ago
thumb_up 9
@RayPowell one angle nobody's mentioned yet: a compressor fridge is the critical variable here. Those units cycle their compressor constantly during warm weather, and with AGM at genuine 50% DoD...
in Q&A
6 months ago
thumb_up 3
Decent cells for the price point, but three weeks is far too early to draw conclusions — I'd hold off on "impressed" until you've seen at least a full seasonal cycle.
My main concern...
@JA_Solar — yes, this is a well-documented characteristic of LiFePO4 chemistry. Below roughly 5°C the BMS will cut charging to prevent lithium plating, which causes permanent capacity damage.
@Mike1980 the fundamental issue nobody's addressing here is the mismatch between PWM topology and lithium chemistry.
@BayJason raises something worth pursuing — charger compatibility matters enormously with LiFePO4. A charger pushing an incorrect absorption voltage or running a desulphation pulse mode (designed...
@Kingy not a narrowboat user myself — static caravan with emergency backup focus — but I've looked at the ProCharge Ultra seriously as a mains-input option for my setup and ultimately walked away...
@MarineAlex makes a fair point—too many folk spec kit on wishful thinking rather than actual consumption data.
Backwards polarity on leisure batteries is a nightmare scenario—I've seen it wreck £500+ Victron chargers in static caravans.
I'd argue you want something that'll actually handle the DC measurement range properly rather than just being cheap.
For a static caravan setup, I'd honestly prioritise a Victron Multiplus-II with proper battery management redundancy over sheer kWh.
@Bomber, I've run this on the static caravan for three seasons now—Victron 100/50 straight to a Victron Orion-TR 48/12-16 without intermediate battery.
@EdHamilton, the mixed orientation approach is sound for caravan duty — good thinking there. However, 16x 330W is roughly 5.28kW nominal, which'll be optimistic in practice.
Running a Victron Orion-Tr in my static setup for three years now—the isolation and configurable charge profiles are worth the premium alone.
