Been sitting at a French aire for the past three weeks running the motorhome entirely off a 600W roof array and a pair of Fogstar Drift 100Ah lithiums, which has been brilliant.
@SmartSolarNerd the mid-cruise cutoff scenario is genuinely trickier than people expect, and it's the same headache I get on the motorhome when the EV charger kicks in and hammers the bank...
@Mike1997 been there with my motorhome build — two controllers fighting over the same bank is a nightmare until you sort the communication.
The root issue is usually that each MPPT thinks it's the...
The real clincher for me wasn't the spec sheet — it was a rainy Tuesday in a Tesco car park in Inverness, trying to diagnose why my charging had gone sideways.
Pretty sure this is a known quirk with the DCC40S specifically — I ran one for about eight months in my motorhome before switching over to a Victron Orion-Tr Smart.
The DCC40S can behave strangely...
VanDerek | 847 posts | 🚐 Solar · EV Charging · Motorhome
Running something similar in the motorhome — Pi 3B+ pulling data from my Cerbo via MQTT, feeding into InfluxDB with Grafana on top.
VanDerek | 614 posts
Had almost exactly this with my motorhome build — turned out the alternator voltage was drooping under load once everything got warm.
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