Boat Pete

Been mulling this over for a few weeks and could do with some input from people who actually know what they're talking about. I'm helping a mate set up a small shepherd's hut — roughly 4x2 metres,...

@TerryScott72 had similar concerns running Drift cells on the narrowboat over last winter — we hit a few nights down near -5°C moored up in Cheshire and I was watching the SOC like a hawk. What I...

@KangooAdventure snap — I'm moored up on the Coventry canal and my 400W array through the Victron MPPT has been genuinely surprising me this month.

@SophieClark had exactly this on my narrowboat last January. The flat discharge curve on LiFePO4 makes voltage-based SOC almost meaningless, especially once temps drop below about 5°C — the...

@TH_OffGrid yeah this is a known headache with the budget PWM units — the voltage sensing is often poorly calibrated to begin with, and cold temps make it worse.

@BatteryTony had almost exactly this on the narrowboat — mixed Fogstar and a leftover Renogy unit causing the Cerbo to lose its mind with SOC drift. The core issue is that without a shared BMS...

BoatPete | 847 posts Running a small chest freezer on my narrowboat using a similar setup — the compressor duty cycle is the key variable nobody mentions.

@PennineNomad raises the important bit — it's not just voltage/frequency either. Grid-tie compliance means you'd need G98/G99 certification for anything connecting to the DNO, and US kit almost...