#153680  by NeilV
 Fri Aug 02, 2019 9:02 pm
Nut17 wrote:
Fri Aug 02, 2019 8:23 pm
It is often too easy to complicate things unnecessarily. A good result. :TU
You could simply fit an ignition switched relay between the battery banks so they are only in parallel when the engine is running.
Thanks, that’s basically what the DVSR does now, only connecting them when there’s a charge voltage high enough (27.6v for 2 minutes) ... think I just need a diode to stop the lithium’s higher voltage from holding the connection once it’s triggered, though the 50A cutoff works there too 🤔

The manufacturer has a “lithium” wiring diagram showing the ‘inching switch’ as this relay, but I tried this manually and the lithium having more than 26v (till 30% SoC) just keeps it connected anyway :roll:
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 #153731  by NeilV
 Sun Aug 04, 2019 7:08 pm
Neddy wrote:
Sat Aug 03, 2019 10:05 pm
He means cable with a cross-sectional area of 50mm², Ray.
Yep, battery interconnect rated for 400A (leftover from my double AGM via DVSR setup before)

Then 16mm2 for the solar controller and bigger Inverter, and the connections between the 60A BMS (negative) and again on the 65A Victron battery protect (positive) complements of the autoelectrical brother in law :D
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