Elektroblock and Solar (1 Viewer)

Jan 31, 2022
278
131
Funster No
86,605
MH
70s camper,Weinsberg
Looking at adding a solar panel set up to the power supply unit in motorhome, may fit suitcase type set up with regulator for 12 months budget and use depending. Will our set up automatically switch to starter battery as struggling to find information I know we have starter on hook up, both on mobile operation charge but need to sort asap as starter battery was at 12.1v earlier in storage yard before we took for a run.......

charger connector.jpg EBL layout.jpg
 
Apr 27, 2016
6,936
8,101
Manchester
Funster No
42,762
MH
A class Hymer
Exp
Since the 80s
The first answer is no, the solar input will not automatically trickle-charge the starter battery like the hookup does. There are a number of possible workarounds, depending on how automatic you want it.

That 3-way connector goes to the leisure battery positive (Pin3) and the common negative (Pin1). On the EBL 252 the starter battery is connected to Pin2, the centre pin. So one possibility is a simple switch that flips the solar controller output between Pin3 and Pin2, and you can decide for yourself which battery needs charging the most.

There are other possibilities. For example a Votronic Duo solar controller has two outputs, and can trickle-charge a starter battery at the same time as sending the main charge to the leisure battery. This can connect to pins 1, 2 and 3 of the 3-way connector.

Alternatively you could fit a battery maintainer to directly trickle-charge the starter battery from the leisure battery whenever the leisure battery is being charged. There are various brands, including the BatteryMaster which is reliable and popular. The connections required are pins 1, 2 and 3, so very convenient.
 
Apr 27, 2016
6,936
8,101
Manchester
Funster No
42,762
MH
A class Hymer
Exp
Since the 80s
Yes that's one of the brands of battery maintainer. The actual VanBitz BatteryMaster is this one:
 
OP
OP
3crispies
Jan 31, 2022
278
131
Funster No
86,605
MH
70s camper,Weinsberg
The first answer is no, the solar input will not automatically trickle-charge the starter battery like the hookup does. There are a number of possible workarounds, depending on how automatic you want it.

That 3-way connector goes to the leisure battery positive (Pin3) and the common negative (Pin1). On the EBL 252 the starter battery is connected to Pin2, the centre pin. So one possibility is a simple switch that flips the solar controller output between Pin3 and Pin2, and you can decide for yourself which battery needs charging the most.

There are other possibilities. For example a Votronic Duo solar controller has two outputs, and can trickle-charge a starter battery at the same time as sending the main charge to the leisure battery. This can connect to pins 1, 2 and 3 of the 3-way connector.

Alternatively you could fit a battery maintainer to directly trickle-charge the starter battery from the leisure battery whenever the leisure battery is being charged. There are various brands, including the BatteryMaster which is reliable and popular. The connections required are pins 1, 2 and 3, so very convenient.
sorry autorouter can you explain which 3 way connector as been down to MH to come up with a plan. did you mean block 5 the one for aux batt which is spare and then work out route for extra cable to each via fuse.
 
Apr 27, 2016
6,936
8,101
Manchester
Funster No
42,762
MH
A class Hymer
Exp
Since the 80s
I think @autorouter may be suggesting Block 2 ( item 6 a 3 x pin socket on your original diagram )for your solar connections
Yes that's the one, it is Block 2 as GeoffnDee says, not Block 5. It's a 3 pin MNL (Mate'N'Lok) connector, available from automotive electrics suppliers. They come with separate pins that crimp onto the wires with standard NON-insulated crimping pliers. The pins have a couple of barbs that lock the pin into the shell when it is pushed in.

The position of Pin1 is labelled. Pin1 is negative, Pin3 is leisure battery positive, Pin2 is starter battery positive. It needs a fuse in the 'Solar ' slot to enable the leisure battery connection - in your picture there's already a fuse in the slot. No fuse needed for the starter battery connection. Best to double-check all this with a multimeter, or course. Note that the 3-way connector is polarised, so it only fits in one way - check the slot is the correct one for the pin before you push it in.
 
OP
OP
3crispies
Jan 31, 2022
278
131
Funster No
86,605
MH
70s camper,Weinsberg
Yes that's the one, it is Block 2 as GeoffnDee says, not Block 5. It's a 3 pin MNL (Mate'N'Lok) connector, available from automotive electrics suppliers. They come with separate pins that crimp onto the wires with standard NON-insulated crimping pliers. The pins have a couple of barbs that lock the pin into the shell when it is pushed in.

The position of Pin1 is labelled. Pin1 is negative, Pin3 is leisure battery positive, Pin2 is starter battery positive. It needs a fuse in the 'Solar ' slot to enable the leisure battery connection - in your picture there's already a fuse in the slot. No fuse needed for the starter battery connection. Best to double-check all this with a multimeter, or course. Note that the 3-way connector is polarised, so it only fits in one way - check the slot is the correct one for the pin before you push it in.
thanks again and connector ordered.

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OP
OP
3crispies
Jan 31, 2022
278
131
Funster No
86,605
MH
70s camper,Weinsberg
Have the actual plug now, can we plug a foldable solar into block 2 (solar regulator) via anderson powerpole plugs or do we need a regulator as well. Then if this works can fit a vanbitz battery maintainer as well or are there any other brands that will trickle off leisure to starter battery as I believe all dont.
https://www.hampshiregenerators.co....panels/excel-power-100w-portable-solar-panel/
the reason for this is we use have had dealing with this company before.
Many thanks.
 
Apr 27, 2016
6,936
8,101
Manchester
Funster No
42,762
MH
A class Hymer
Exp
Since the 80s
Have the actual plug now, can we plug a foldable solar into block 2 (solar regulator) via anderson powerpole plugs or do we need a regulator as well.
The Block 2 connection is straight wiring to the leisure battery, no inbuilt regulator, so anything bigger than 10W or 20W will need a regulator
 
OP
OP
3crispies
Jan 31, 2022
278
131
Funster No
86,605
MH
70s camper,Weinsberg
The Block 2 connection is straight wiring to the leisure battery, no inbuilt regulator, so anything bigger than 10W or 20W will need a regulator
Thanks much appreciated, is there a better option than something like this as it part future proofs so we can have a 200w panel on the roof in the future.
 
Apr 27, 2016
6,936
8,101
Manchester
Funster No
42,762
MH
A class Hymer
Exp
Since the 80s
Thanks much appreciated, is there a better option than something like this as it part future proofs so we can have a 200w panel on the roof in the future.
That's a very good option, just one thing is that this BlueSolar version doesn't have Bluetooth capability, the SmartSolar version does, so you can see the settings on a phone app, and change the settings easily. Also plays nicely with any other Victron kit if you have it, or intend to fit it in the future. I think the MPPT part is the same in both versions.
 
OP
OP
3crispies
Jan 31, 2022
278
131
Funster No
86,605
MH
70s camper,Weinsberg
Thanks have smart solar Mppt will connect via this to Ebl, have done this sketch. Job for weekend before fitting larger LB.

20230121_173937.jpg

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OP
OP
3crispies
Jan 31, 2022
278
131
Funster No
86,605
MH
70s camper,Weinsberg
The first answer is no, the solar input will not automatically trickle-charge the starter battery like the hookup does. There are a number of possible workarounds, depending on how automatic you want it.

That 3-way connector goes to the leisure battery positive (Pin3) and the common negative (Pin1). On the EBL 252 the starter battery is connected to Pin2, the centre pin. So one possibility is a simple switch that flips the solar controller output between Pin3 and Pin2, and you can decide for yourself which battery needs charging the most.

There are other possibilities. For example a Votronic Duo solar controller has two outputs, and can trickle-charge a starter battery at the same time as sending the main charge to the leisure battery. This can connect to pins 1, 2 and 3 of the 3-way connector.

Alternatively you could fit a battery maintainer to directly trickle-charge the starter battery from the leisure battery whenever the leisure battery is being charged. There are various brands, including the BatteryMaster which is reliable and popular. The connections required are pins 1, 2 and 3, so very convenient.
Got leisure working no probs, now need to sort starter, have a block diagram and pin 2 seems to operate via fridge relay and also starter relay so your idea of a switch seems next plan.
For now starter is temp hooked up as it was below 12v 😢

20230302_083505.jpg 20230227_164819.jpg 20230227_164758.jpg Screenshot_20230228-183001.jpg
 

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