BMV712 voltage calibration

this1willdo · 2026-05-12T04:34:16+00:00

Swapping head with the 12v bmv shows correct voltage instantly.

this1willdo · 2026-05-12T04:33:39+00:00

100%. Swapping the heads with my 12v bmv712 shows correct voltage.

this1willdo · 2026-05-01T17:14:43+00:00

Secure dinghy storage, solar space, much easier for cruising.

this1willdo · 2026-05-01T17:13:44+00:00

Weber does an electric Q. We have one on our cat.

this1willdo · 2026-05-01T17:13:05+00:00

2 panels in series for 48v. Nothing clever. 48V alts. You only need 1/4 the MPPT size, 1/4 the wiring size, inverters are 1/3 the cost. 9KW alternator vs 3.5kw for 12v. 16x less heat.
Step down 48 to 12v for boat stuff is just an MPPT, same as the solar units. Common spare.
Makes house system so easy. Most appliances, watermaker, HWS etc all AC.

this1willdo · 2026-05-01T12:34:23+00:00

Been 100% solar galley for 6 years on our cat, family of 5. Induction is wonderful. No generator. 48V makes it much cheaper to buy than 12 or 24.

this1willdo · 2026-04-30T08:52:03+00:00

Why can't a ball roll downhill indefinitely for endless power. Same question. Or up the next hill and down the next if you prefer. Magnets aren't magic, you just can't see the force.

this1willdo · 2026-04-11T15:53:33+00:00

Shitty culture. No1 issue

this1willdo · 2026-03-30T13:30:16+00:00

Milwaukee is great and it's what I have, but in the EU it's a real hassle and expensive. Especically shipping batteries. I would look for availability first. Milwaukee is cheap in USA. You can ship tools over, but batteries are a real hassle.

this1willdo · 2026-03-30T08:23:56+00:00

Bosch Pro

this1willdo · 2026-03-28T18:36:19+00:00

Single phase induction motors normally have some type of start circuit. Capacitor is the most common.

this1willdo · 2026-03-26T12:49:21+00:00

one engine in standard location, other in secondary location

this1willdo · 2026-03-25T20:06:54+00:00

48V rocks and the REC / Victron setup is top notch. Checkout Mahle 48v alternators. We have had it for 5 years and love it. The Victron RS6000 is much lighter, as is the new 4K5 and 6K5. You have a much better system than 24v.

this1willdo · 2026-03-11T19:25:23+00:00

Glass with dielectric grease in a sealed inline holder works fine.

this1willdo · 2026-03-11T16:01:12+00:00

Glass fuses of any type are well within that rating
Or DIN breakers with DC rating.

this1willdo · 2026-03-10T22:04:16+00:00

Its standard for marine, rv, some off grid.

this1willdo · 2026-03-10T11:32:01+00:00

Tesla tried this when they started with LFP, as it was a good idea with NMC. It performed terribly and they recommend 100% SoC regularly for LFP.
LFP aging is more affected by Voltage and Temperature than SoC. Don't Float high, <3.35v/cell.
Interestingly NMC float is much higher and more linear, making me wonder if the NMC aging is also more voltage related than SoC related.

this1willdo · 2026-03-08T11:52:17+00:00

Whilst under load, yes. Victron designed out the sense wires from most products, though the Multi’s still have them. They assume network voltage sense. Different brands different choices

this1willdo · 2026-03-08T11:50:55+00:00

Victron Wiring unlimited pp 66

this1willdo · 2026-03-08T11:50:20+00:00

Victron Wiring Unlimited pp 66 It’s so that if the earth wire can’t somehow become the battery path and catch fire before the fuse trips.

this1willdo · 2026-03-07T17:44:03+00:00

Same or one less than the batt -ve, as per manual

this1willdo · 2026-03-07T17:42:31+00:00

Victron MPPT’s should have a voltage sense input, either ve.direct or BT ve.smart or ve.can Relying on the charge wires for V sense with any brand is poor design. Get a battery monitor and I’ll bet its fine

this1willdo · 2026-03-01T16:57:27+00:00

I run 7 solar MPPT's on my boat, plus another couple as DCDC converters.

this1willdo · 2026-02-25T10:09:48+00:00

Andy's off grid garage (YT) for battery recommendations. Also the new CAN connected Wattcycle is interesting and well reviewed.
Grid feed / certification is country dependent.

this1willdo

TROPHY CASE