Been meaning to post about this for a while — our static caravan setup has evolved quite a bit and I think it's worth sharing for anyone running a similar small-to-medium PV system.
We started with 160W of panel feeding into a Victron BlueSolar MPPT 75/15, which served us reasonably well for basic loads. The problem came when we added an EV trickle charger (just a 3.6kW Type 2, nothing fancy) — the whole balance of the system fell apart almost immediately.
A few things I've learned the hard way:
- Panel wattage is almost irrelevant if your battery bank can't absorb the charge rate properly. We had a mixed AGM bank initially, which was a disaster.
- Switching to Fogstar Drift LiFePO₄ cells made an enormous difference to usable capacity and charge acceptance.
- The BlueSolar is fine for modest setups, but if you're running anything beyond lighting and a 12V fridge, you'll outgrow it faster than you expect.
Currently sitting at 640W of Renogy panels, the Victron SmartSolar 100/30, and a 200Ah Fogstar bank. EV charging is handled separately via a small inverter arrangement when we have grid hookup available, which keeps the off-grid side clean.
Questions for the forum:
- Has anyone successfully integrated EV trickle charging directly from a solar/battery bank without grid backup on a static caravan setup?
- What monitoring solution are you using — full Victron GX, or something more budget-conscious like the Bluetooth app alone?
Keen to hear from others who've gone through similar growing pains with undersized starter systems.