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thanks @JoseAgustinV . I ordered and just received one of these units. And yeah, as you described, the MPPT is active regardless of whether the rocker switch is on or off. The MPPT seems to power itself off when PV voltage drops below batt voltage. So the rocker switch only controls the inverter...

I think the Blue Sea 7713 has that behavior. while positive voltage is on the control cable, the relay remains "on". When positive voltage on the control cable is lost, the relay shifts to "off". It is a mechanical latching relay - and I recon it is using power from the protected battery to...

@greyghost I'm also putting together a new electrical system for my boat. Small boat. 28' BCC. First foray as well. I have purchased 8 100 AH Fortune cells for the house bank which will be 12v 2P4S - replacing AGMs. I'll keep a dedicated AGM engine start battery. I'm planning on using an...

A "normally closed" (NC) relay passes power when the relay is not energized. which is unlike a NC valve in piping ... which does not pass flow. A "normally open" (NO) relay passes power when the relay is energized. which unlike a NO valve... which does pass flow. The stock Chargery relays are...

id like to retrofit my Yanmar/valeo alternator, but avoid the the cost of the Balmar retrofit kit. I started a new thread for that here.

An alternative arrangement is to keep an AGM engine start battery and charge both the AGM and lifepo4 through an isolator as described here: http://nordkyndesign.com/electrical-design-for-a-marine-lithium-battery-bank/ (see "Alternative 2 – Split Charging"). There are BMSs that provide provide...

There is no harm in having a relay whose capacity far exceeds your max expected load.

Found this LittleFuse item, which looks like a close cousin of the Blue Sea HD latching relays. But not finding it to be any cheaper: https://www.littelfuse.com/~/media/commercial-vehicle/hot-feeds/littelfuse-relays-hd-bistable-d653-info-sheet.pdf

I popped the cover off the integrated regulator. It is held in place with RTV silicone - so not hard to pull off. This reveals the traces/pads and the regulator IC. There are fine wires connecting the traces to the IC. so it is possible to isolate the field brush here by snipping the appropriate...

Bump. Can any existing MPP Solar owners shed some light on this?

That's a pretty important switch on a boat. Accidentally press that switch and ALL you DC is offline. All you navigation equipment, nav lights, interior lighting, etc... that panel probably belongs under a protective cover.

Yeah, I don't think you can put the Chargery charge/discharge lines in series. Each one of these is supplying current. They are not simply switching a circuit.

I received my MPP Solar PIP-1012 MS today. ordered via https://usa-mpp-solar.com. Same guy, Ian, who sells on ebay as "usa-mpp-solar". Total cost was $339 - which is cheaper than the ebay price. (y)

Yes, I plan on using the Balmar amp/belt manager to derate the alternator 50%. Start there.

I‘m building a system that is going to be on 24x7x365 with limited solar, so need to minimize the overhead consumption of the BMS package. What is the resting power consumption of the Chargery? Say a BMS8T, with no balancing going on, excluding power consumed by the relays? Can the LCD screen...

I have a Yanmar 3YM30 with the 120A Valeo alternator and I am installing a lifepo4 bank. I plan to use a Balmar mc-612 regulator. So I am attempting to convert the alternator for external regulation. Unfortunately, this alternator has a combined regulator + brush holder, which makes the...

@greyghost looking at the Blue Sea wiring diagram, I see they show a 2A fuse supplying power to the SPDT switch. So the signal is low power. It must be drawing the 7A on Connection A.

Has anyone successfully mapped out what the other connections are on this JBD BMS? Apart from the comm and balance lead connections? Looking from left to right on mine, I see: CANBUS? CANH CANL GND Mystery B A Mystery "SW" with 2 terminals Comm port - TTL? what baud? VDD TX RX GND...

Hello! I see @Will Prowse loves these units :) but also see that he points out a high standby load on the inverter (15W for the 800/1000W units). Is it possible to turn the inverter off while still having the unit charge batteries via the mppt solar charger? or is the on/off button an all or...

What is the power consumption of an octocoupler like the Opto 22 DC60S5 will used in his video? wondering how this contributes to the total power consumption of the BMS for lower power systems. i.e. if the Daly is pulling 30uA... but this octo is pulling 100mA, then that might be significant...

Thanks @JoseAgustinV. might be a dumb question, but: to turn the inverter off, you are rolling the rocker switch to off? And the lcd panel goes dark? But it appears to keep on charging your battery via the mppt? Thanks!

they ship from Utah FedEx ground. I ordered on the web site. they just cleared a shipment through customs and are shipping from inventory right now.

Unfortunately, where the F brush is soldered on the back of the brush holder is a trace that leads into the internal regulator. So separating the F brush from the internal regulator is not easy to do without getting destructive. I may need to just bite that bullet! B+ is always on and the...

I would like to implement an audible alarm when the BMS takes the battery offline. conceptually, this might be a normally-closed (NC) relay taking signal from B+ to P- and the relay output could switch an alarm that takes power from B+ to B- (or uses an independent power source). When the BMS...

Hello All, I have 8 100AH Fortune cells that i need to put together for a 12v system. It needs to be able to handle 200A peek loads. Normal loads will be well below 100A. I like Will's recommended JBD BMS - but capacity is limited to 120A (maybe 130A peek). So I am considering using 2 BMSs. I...

I am aiming for a system that can support a 2000 watt inverter. So call it 200A. Can the Chargery be configured to actuate a single relay rather than separate charge and discharge relays? i.e. if I purchase a particularly expensive relay, like a Blue Sea 7713, and i want to avoid buying 2 of...

I'm building a 12v system - so yes, 167A minimum. Although, if I could get the Chargery to just turn the inverter off rather than switching that load, then i can look at the next highest load - which is a 1000W 12v DC motor - so maybe 85A... with startup transients... so maybe size for 120A.

I’m considering a similar arrangement. But the Chargery wants to drive separate charge and discharge disconnect relays, and these Blue Sea 7713 relays are wicked expensive. Are you planning to use a small SSR to combine those signals into one as @DW SD did? I’m looking at the BMS as purely...

I think i have that problem in both configurations. These BMSs have an over-current protection that can shut them down too. So if I'm pulling peek load and one of them trips for whatever reason, the other is going to trip a moment later because of the"over-current" protection engaging. Not sure...

right. but i do appreciate the concerns about what happens in an over-current trip. One of the 2 BMSs will trip before the other - leaving the survivor to face 200% of rated capacity for a moment before it trips as well. Presumable, even battleborns would face this issue - and it comes down to...