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I know that batteries should be connected before MPPT and when dissconecting the MPPT sould be first so what happens if the battery fuse blows while panels are still producing power , will the MPPT be damaged .

Thank you i really o appreciate you taking the time to read and more importantly pass on your observations/thoughts which i have taken note off . In general i now feel more confident about making the final conections , the continuity i was seing in so many places was a concern and although i...

Would someone knowledgable please look at the circuit and tell me if its safe or has flaws or needs moifying before i turn on and possibly find out the hard way . The Lithium battery is sufficient to cover our normal consumption between the hours of 6pm and 10am , when we have bad weather and...

I am building a mobile tubular steel rack for my Solar Equipment and Batteries , the back panel is now a 2mm sheet of steel and the MPPT , Inverter/Charger , and DC to DC Charger are mounted on it with Positive and Negative BusBars mounted on an insulated board lower down Behind where the...

Friend who know nothing about Solar need to replace his 12 x 2 Volt 600 Ah lead Acid batteries , he needs either 2 x 12 volt 400Ah or 2 x 24 volt 200 Ah , cost , space and weight are not factors tha need to be concidered so which is the better option .

While i admit im used to Lead batteries and know very little about LifePO4 but Im concerned the aboiut the charging and behavior of my recent first purchase of a 100 amp/Hr 24 volt one . The battery charges normaly for a few hours getting to around 90% then all of a sudden within a couple of...

Would appreciate any suggestions or input on a situation my friends are suddenly encountering . Their Flooded batteries are around 7 years old and looking back via Victron Connect I can see they would normally spend several hours in Bulk then a few in Absorption but was rare for them to go into...

Thank you Sunshine for your explination , I hadnt reconised there was no current going in while there was voltage , makes sense to me now .

Now sure what to expect from my new LifePO4 battery , it came with 40% charge and a voltage of 26.2 as the manual says it would and i left it standing for 2 months before charging . When charging i noticed the Victron DC to DC charger was going through Bulk chargewith voltage slowly rising as...

Is it safe to use much smaller cables between different pieces of equipment when they are close together . The manual says that from my batteries to my Victron 24 volt 1200 watt inverter requires 25mm cables between 1.5 and 5 mtrs ,mine is 1 mtr apart but i am wondering if i have to use the...

Is there such a thing as a Manual DC change over switch made to mount on a DIN rail inside a consumer box next to the Isolation switches and surge protectors , i dont want to install a stand alone one . Looked on Amazon and cant see anything but possible i don't know what they would be called .

My intention was to use a switch that would make conecting them both at the same time imporible , the the one you showed is ideal , 1 , 2 or OFF . My diagram was simplistic to ilistrate my concer which you both clarified and put my mind at rest on , which was using a common Negative which i feel...

I dont know low cut off because i never go below 50% they were extreemly expesive batteries , hard to know because the Fridge and the freezer cuts in and voltage drops below 23 for fraction of a secod , not long enough to see on a graph often but the lowest voltage is always recorded as around...

Thank you 12Volt , you clearly understood the question and your answer was exactly what i was hopeing to hear . My normal battery bank is more than sufficient for about 320 to 330 days a year but when the weather is bad its always the nigtimes that are a problem . At these times i have to start...

I would be very grateful if someone could advise me if the Backup setup illustrated here would be feasible and safe . For reasons i dont want to go into its not practical to incorporate a switch to isolate the Negative wire to the Busbar as well as the Positive so im concerned if there might be...

What are users mounting their Inverters , Charge Controllers and associated equipment on . I am in Spain and getting anything other than Wood or Steel sheet is very difficult .

Batteries and DC-DC charger ordered , now i jusy need to confirm how to wire everything . Looking for a change over switch ( centre of diagram )so that i can turn Off the feed to the Inverter from the BusBar and make a connection to it from the Lithium Battery , what type of switches would...

I hope the information i have passed on is correct , i have taken it from Victron VRM although voltages i used to worry about because when the batteries are on load its misleading and they appear lower than they are . I installed a Victron Shunt and those are the figures im seeing now , amazed...

Thank you 12voltinstalls for taking the time to write such a long post so i will do likewise to give as much info on my current system and needs . We already have 2240 watts @ 114 volts of panels supplying 400ah of AGM batteries which we used to replaced the flooded lead acid . Our 24 hour...

The problem i can see is that AGM and Lithium use very different charging profiles so would have to have a separate charger of some type . Could use a separate MPPT for the Lithium but then where would it get its solar input , the input i have is one cable from my array and not practical to run...

Thanks DIYrich , once the AGMs have started to fail i plan to replace them with Lithium lifep04 so its good to know thermal runaway is not a common issue with them however that will be some time away . The AGMs were expensive costing £2000 18 months ago and are four times the capacity i need at...

Thank you Pollenface but im really looking for opinions or advice on the the use of Lithium batteries , if they can be left continuously on charge and suitable for going long periods without use . Not sure why you dont think i am cycling my AGMs , they are cycled daily , charged during daylight...

For personal reasons I have to find an alternative backup method to a generator and considering installing a 24 volt 100ah stand alone lithium battery into our solar system which itself use 18 month old AGM batteries which are performing well . Daytimes we have far more coming in than we need...

Its AC and DC symbols together next to the settings , it recognises which is which when the probes touch and confirms on the screen which it is . Tried about 20 different meters and found this one to be an excellent meter and very accurate with both Voltages . Others mostly good up to 1/10 volt...

Not sure what you mean . I did test the Amps output on some Solar panels that i had removed , by moving them around facing the sun while adjusting the angle they all eventually raised the output until they showed values reasonable close to the rated figures .

The probes were plugged in exactly as in the photo , the dial also set to where it is in the Photo at " A " with a reading of 0.002 which i took to read 2/1000 amps and also to the setting above it above it " mA" with a reading of 0.00 . The small sparks each time i touch the probes to the...

I only have a Multimeter that reads up to 20 amps , i don't know if it helps or identifies anything but i set it to read Amps and the dial to " mA "and there was a tiny spark when i touched the probes to the terminal and the reading was 0.00 , when i changed the setting to " A "on the Multimeter...

The new Panels were wired for 100 volts coming in with but the issue came about the night before the new panels were installed and that night there were no panels at all connected to the MPPT . The screenshot is of last night which is typical battery voltage 24.7-24.9 , MPPT input termoals...

I have an old Style Victron 150-70 Blue Solar MPPT , the one with a small screen and 4 buttons on the front for Setting up , Monitoring and reading History etc . The unit has been performing perfectly until About 2 weeks ago when i removed my 16 assorted sizes Poly Solar panels as they were...

Will see what the generator manufacturer has to say after the holidays and post back here . Checked the htz and its between 48 and 51 but the voltage is stable within 1/10 of a volt AC . Although my batteries are almost full and in absorption I did just try selecting Automatic but the LED...

Thanks Filter Guy , our 1800 is a Honda EU22i ( EU 2200I ) inverter Generator but i used to have a cheap 800 watt suitcase Inverter Geny and the same battery Charger produced the full 20 amps even with that . The new one i just bought is a normal generator with AVR , i only bought as a back up...

My normal generator is 1800 watts output and my battery charger is 20 Amps@ 24 volts and when batteries are low it shows the full 20 amp charge . Yesterday i bought a Goodyear 1100 watt ( 1000 nominal ) generator which i was very pleased with , started 1st pull and runs like clockwork at a...

I wouldn't use a converter , had them before and each one caught fire . The place they would need to go is inside a small plastic box with no ventilation or airflow so i think i would be inviting another fire .

You are totally wrong with your charging voltages Steve if your talking about Lead Acid battery which i have . Look at manufacture data sheets and you will be better informed . Rolls for instance , a leading make set Absorption voltages at over 29 volts . I have Trojan AGMs and charging voltage...

Now had chance to try it but at the moment i only have a 12 volt motor and 12 volt x 20 watt halogen bulb but connecting just the motor i had 13.8 volts on Multimeter , with bulb in series that dropped to 12.8 which would be ideal except that a 20 watt bulb is far to big just as a small...