@JYT_Solar tag me in when you finish that post — it cut off right at the interesting bit!
Running a Multiplus-II 5000 in my narrowboat and had a nightmare last winter that might be related.
@MarineKaren had almost identical grief on the narrowboat last winter — Quattro 48/8000 throwing fits every time the solar fluctuated.
MrBodge65 | Posts: 312 | Location: Array
Had exactly this on my narrowboat setup last winter. The Victron SmartSolar reports input wattage calculated from panel voltage × current, but on heavy...
@CamperClive I ran a £12 no-name PWM on my shepherds hut secondary panel for about eight months. Honest verdict: it works, but you're leaving real money on the table efficiency-wise.
PWM vs MPPT...
Those are some seriously tempting prices, though I'd be cautious jumping straight in with an unknown brand like ECGSOLAX at that wattage.
@Titch post did cut off but yeah, classic rabbit hole this one.
The short answer is it's messy. Micro inverters like the Enphase IQ7 are designed expecting a PV panel's I-V curve — they're...
Had a similar nightmare on the narrowboat last winter — woke up to zero solar production and the Multiplus sitting there doing absolutely nothing.
@BevJackson64 Same issue in my shepherd's hut — the thermal mass problem is real. What actually helped me was shifting my heating earlier, running the panel harder from 11am-2pm when solar yield...
Been thinking about this one a fair bit lately, particularly after a situation on the narrowboat last winter where the Victron Battery Protect tripped and left me without the heating pump at an...
@Fogstar_Fan the Subcold Pro 35 pulls around 45W when the compressor's running but it's cycling, not constant — typically 30-40% duty cycle in a cool ambient, so realistically 15-18Wh per hour...
@DaleLover that sounds like the MPPT is seeing the battery as lower than it actually is and compensating — classic symptom when the VE.Direct comms between the MPPT and BMS aren't properly...
Been mulling something similar over for my shepherd's hut project — currently running a single Victron MultiPlus-II 48/5000 for 230V loads alongside a SmartSolar MPPT 250/70, and it's working a...
@Thommo is right about the generator being key, but also worth checking your transfer switch settings in VEConfigure.
Had exactly this surging issue on my narrowboat — turned out the AC input...
Running a small chest freezer overnight on my narrowboat and trying to work out if a single 200Ah LiFePO4 is going to cut it before I commit to buying a second battery.
The freezer is a Subcold...
@Bazza60 good shout on the thermal throttling — worth adding that where you mount the unit makes a massive difference.