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Updated : 30/09/2018


                                                         Schaudt Elektroblock

We are Schaudt recognised distributors able to repair or supply the Schaudt Elektroblock range, all models from the EBL 20 through and beyond the famous EBL 99 which is fitted in more Motorhomes Worldwide than any other Charger/Power Unit. We supply remanufactured units from £280 and typically repair Elektroblock EBL xx units at £130 (no VAT) but plus return shipping. 

Apart from the paragraph above explaining what we do, that is all the advertising you will see on most of the information pages. 

Schaudt units are well made and one of our favourite chargers to repair because of the quality of the base product.  Support from the factory is excellent.

Contrary to the information on the Web Forums they do have built in Spike/Surge protection. Exactly the same electronic protection as used by almost all the Chargers we repair from Arsilicii to Nordelettronica. So, contrary to what you may read on the Forums, they do NOT have a problem with mains voltage spikes.  

Almost all of the problems we see with Schaudt Elektroblock EBL charger failures are down to the use of Batteries past their best. 

The key to prolonging the life of any Motorhome/Caravan charger is replacing the battery before it is past it, as batteries are used they deteriorate, even the very best batteries lose a little bit of capacity each time they are charged/discharged. 

As they are used they place an increasing load on the charger. Some budget batteries at 1 year old can be placing a bigger load on the charging systems (both the Alternator and Mains 230v charger) than the best battery does at 3 years old. See here for more info

Recent testing has shown that the Schaudt charger can have it's reliablity improved by the addition of a Schaudt OVP 01, but not to protect it from Mains Spikes which the OVP 01 has been shown to be slow to catch, but protection against rapid repeat interruptions in the mains supply. 

See our OVP 01 page for more  HERE:  

Schaudt Elektroblocks are far more than just a Charger, they are sophisticated units, with multiple functions :

1. Routing all charging for Solar, Alternator or Mains/generator. The EBL has built in Alternator charging control, there is no separate Split Charge relay like on some vehicles, it is all built into the box.

2. Solar Power charging consolidation by displaying Solar charge, both the Voltage and Current, on the main display for both Habitation and Starter batteries

This isn't supported on all models and only available if the Schaudt compatible Solar Regulators are used, see our Solar Power pages for more info.

In addition to the Analogue and LED displays, some LCD display units, like the DT 201/EBL101 and DT 220/EBL 220, have a separate, 'page' to show Solar charge, like this below :  

In the photo above, the Solar 'page' (note little Solar/Sun symbol) shows 1.1amps is going into the Habitation battery and 0.7a to the Starter battery. If you press the Battery button a second time, the Voltage 'page' is displayed for both Starter and Habitation battery. 

The above display information is only available if the Solar install follows that recommended by Schaudt and the Motorhome manufacturer, see Here for more details.  

3. A power boost controller for the Alternator charge to the Leisure battery. Some of the Schaudt products, like the EBL 109, WA1215 range, etc. use Voltage Boost technology that boosts the Alternator output to compensate for lost voltage over a long cable run. 

An Elektroblock equipped Motorhome has heavier duty cables for the Alternator cabling, generally higher quality/core thickness than many other manufacturers Motorhomes, resulting in little loss of voltage. 

Along with the way the Elektroblock works, this helps an Elektroblock to recharge it's batteries on the move more quickly than many other manufacturers units/installs and why aftermarket Alternator Battery 2 Battery Booster units are not only less effective but should NOT be fitted unless the installer fully understands the Elektroblock and the implications.  

The Schaudt Elektroblock almost always charges the Habitation batteries at the fastest rate commensurate with long Battery Life. 

Adding a B2B with it's higher charge rate usually degrades the battery, resulting in lengthening charging times because of the degradation caused by the faster charging effect on the battery. 

A B2B 'fast' charging conventional batteries might have slightly faster charging times initially, but these will worsen as the batteries are used and degrade from the higher voltage. Ultimately the batteries may become so corroded internally from the forced charging, sometimes in less than a year, that the B2B charging times may actually be longer than the standard set-up. 

4. Starter battery charging when on mains EHU, with between 2 - 6 amps charging dependent on the EBL model. Therefore a "Battery Master" style device should not be fitted as the EBL already has this functionality built in. 

5. Power distribution with the required safety mechanisms. The fused outputs can supply power up to 90% of the fuse rating, as per most fuse protected devices.

Some Elektroblocks will cut all 12v power when the voltage falls below a preset level, usually around 11v, to allegedly prevent damage to the battery from complete discharge. But note that for long battery life most battery manufacturers recommend a discharge to no lower than 12.1v, otherwise Battery life is usually compromised. Even on specialised deep discharge batteries. 

Many of the charts you will find on the web are out of date, based on old high Antimony based technology. They also don't take account of the fact that different technology batteries have different voltage ranges. 

The Yuasa chart below shows how the battery State Of Charge varies across technologies. 

Sealed/VRLA (Gel, AGM and Powerframe) have a resting voltage closer to 13v, not the 12.5v/12.6v that many out of date charts depict, so also have a correspondingly higher fully discharged voltage :




6. Most Elektroblocks control the refrigerator operation, even offering the ability to run an AES Fridge directly from the Leisure battery for short intervals without the Engine running. While this functionality is offered by the EBL, some Motorhome constructors don't always use it.

There is no external fridge relay, all controlled within the EBL. 

7. Frost protection. On some models a Truma frost protection valve will open to drain the Water Heater below preset temperatures, usually around 3 degrees above freezing, not the minus temperatures many expect.

8. An inbuilt Power Supply/Charger that provides much of the 12v demand in addition to charging the battery. Early EBL units had a 16amp charger later models had 18A.

Note that the EBL 119 that replaced the EBL 99, has a much more effective charger, getting bigger battery banks up to full charge in hours, not weeks. See How a Charger Works for a more detailed explanation. 

9. The ability to integrate additional mains Charger units (two on the EBL 220) to cope with multiple batteries that go above a Schaudt Eletktroblocks 180Ah battery bank limit. 

Because the EBL charges both Habitation and Starter Batteries, you should also make an allowance for the Starter battery capacity when calculating the bank size. 

One of the new Schaudt EBL 107 18amp charger documents states :

"The leisure battery may be damaged beyond repair if totally discharged. So therefore Fully charge the leisure battery before and after a shutdown (connect the vehicle to the mains for at least 12 hours and 24 hours for an 80Ah and 160Ah battery respectively)".

To us, that suggests that Schaudt consider the limit of the 18a charger is a 160Ah habitation battery, presumably making a 20Ah allowance for the Starter battery?

On an EBL 220 up to 6amps can be sent to the Starter battery, one third the total charger output and a significant amount. The second and third Auxiliary charger (giving 54 amps total mains charging capability) on this EBL puts it's 12v output directly into the EBL and the charge is distributed evenly to the batteries as required with the Control Panel showing the extra charge. 

The new EBL 119 replacement for the old EBL 99 has a timer interval on the Gel/Lead setting which is 4 times longer than the old EBL 99, giving much faster, more complete charging. 

See our webpage "How does a Charger Work" for more info on 'Timers' and charger efficiency :


10. The EBL 99k built from around 2013 onwards has greater inbuilt protection for various circuits in the form of electronic fuses. In the event of a short circuit, the EBL may require 'resetting' to reactivate the fuse. This is done by turning the unit off for 30 seconds, then back on. This applies to some other late model EBL units as well. 

Pre 2013 EBL units do not respond to a 'reset', turning these off and on sometimes results in the unit not powering back on. 

We recommended that you never use the On/Ein, Off/Aus switch on the front of an EBL unless it is one of the later 'Slide switches' used from from about 2013 on. 

The switch does not isolate the EBL from the battery as the manuals usually state.

Solar Power.

The Solar charge regulator should pass it's charge output into the Elektroblock's pre-configured Solar ports (one for the charge power and one for the data output from the Schaudt Solar regulator) so that the EBL can distribute all Battery charge current and show the values on the Control panel. This isn't always essential on units like the EBL99, but the charge rate will then show on the Control Displays if you do. 

You may impact the warranty if you don't fit the Hymer/Schaudt recommended device, particularly if the wiring is changed or cut for the installation of a Battery Master, which will in any case short circuit the EBL's functionality? 

See HERE (section 3) for more information on why a Battery Master style device, like the Vanbitz, CBE, Sterling, etc,  compromises the EBL and is also the least efficient method of keeping the Starter battery topped up when installing Solar. 

The EBL 101, 226, 220, etc should have the recommended Schaudt Solar regulator fitted, or the compatible Votronic MPP xxx Solar controllers. Both the Solar Regulator 'power/charge' cable and the Solar reg 'Data' cable should plug directly into the EBL. This is because these EBL's are designed to handle ALL power being drawn from, and all charge into, the Habitation Area batteries. 

By being the sole controller of the battery power the EBL can calculate how long the battery will last and show a display on how many Amp Hours (Ah) remain. 

If any device is either putting power into/drawing it out of the battery directly, without going through the EBL, the calculations will be incorrect. In severe circumstances, such as the battery voltage rising when the EBL expects it to be dropping, or vice versa, the electronics can believe there is a fault and shut down.

You can see on the picture below, over towards the lower left, a 3 pin Solar Regulator charge socket which is used to Solar Charge both the Habitation and Starter batteries. Additionally over towards the upper right hand side is BL9, a mini 4 pin Data Socket that the Schaudt/Votronic regulator uses to pass the amps/volts data to allow the EBL 220 to calculate the charging rate from the Solar Panel and for the DT220 LCD display.

The Schaudt regulators come complete with all cables, connectors, instructions, fuses, etc to make the installation far easier than via any other method. It takes 10 minutes to cable up a Schaudt regulator to an EBL. We have seen Installers invoicing hours for the time taken to hard wire a generic Solar regulator, like a Stecca, to a Hymer's Habitation and Starter batteries. 

The Schaudt LR regulators might be more expensive to buy initially, but will save money overall by costing a lot less to install, as the cables are all supplied and pre made. This also reduces the risk of the installer causing expensive damage which is sometimes created when they try and wire in the Solar charge to the Starter battery. 

We very rarely see a Motorhome manufacturer recommended Solar Install, even when done by Dealers, although this situation improved a lot in 2018. 

This is a LRM 1218 with the cable kit that comes with it :

Note that we also recommend the Schaudt compatible Votronic Solar Regulator, see the Solar Power page for more.  



If you connect your Motorhome to mains supply a few days before you leave for your holiday you will reduce the chance of Starter battery issues as well as ensuring you have full leisure batteries. You don't need to activate the control display panel, i.e. switch it on. The charging will still take place even with the panel 'off'. 

This operation is quite different to the Sargent EC range (like EC500) which requires you leave the Power Distribution unit 'powered on' for it to manage the charging via it's 'Smart' feature. 

As a result there can be some misinformation around this as some people used to the Sargent systems will tell a Hymer owner that the EBL must be left on when this is not necessary and vice versa.

How to look after your EBL:-

1. Don't continue to use a battery that is past it's best. Almost all the failures we see are down to poor batteries, see our separate page, 'Battery Technology' on how to save money on the best batteries which have been as low as £95 each. 
2. Don't cover it with a Duvet, keep the EBL cool.
3. Do disconnect it from the mains/battery before switching the device from Gel to a Wet battery setting: See the separate Battery Technology page for information on the suitability of Gel batteries in Motorhomes/Caravans.
4. Don't run the 'Mains' supply from an unsmoothed generator supply: Use only Generators with a PURE Sine Wave output or that use Inverter technology. NEVER use a Generator that is not suitable for sensitive Electronics.
5. NEVER run without a battery connected, some Caravan/Motorhome Power Supplies can work in this way, but the strain is significant.
6. Never Isolate the Starter Battery, by removing a battery lead etc, if the Alternator is spinning.
7. Do make sure the mains hook-up is unplugged when you do any battery maintenance, like attach/detach the battery cables.
8. Do play safe during electrical storms. If you are in the vicinity of an electric storm, particularly abroad, cut the mains supply to the Motorhome/caravan by pulling the Mains hook-up lead until the storm passes. Lightning can hit overhead power cables which may lead to higher than normal voltages in the immediate vicinity.
9. When towing a Caravan don't connect the Car to the Trailer tow hitch while the Car engine Ignition is 'on' making the 12n/12s charging circuits live and prone to shorts/reverse polarity issues.



Removing or Installing a Schaudt Elektroblock.

This information has been updated. Please request instructions by completing the contact us page. Do not use older versions of this document that you might find on Forums or Google. Thank you.

Contact Us page.

This is NOT one we destroyed earlier. This EBL 99 is scrap, as we can't repair it as the entire Schaudt charger PCB has been removed, unlikely the factory will either, as there is no longer a charger PCB inside the unit to repair :

Because this unit has been modified, a big hole drilled in the side case plus internal modifications (in many instances the Schaudt Charger PCB's completely removed) many repairers will not entertain these.

So who will maintain it in the future if you do have something like this done?

This most likely cost around £90 for the 1990's designed Zig charger, plus an awful lot of time. In man hours and parts, most likely around £200 total?  Yet the Zig add-on charger struggles to deliver 10amps and only at 13.5v. It will take forever to charge up 2 decent Motorhome batteries.

It is so inferior to the factory original it is likely to lead to premature battery decline.

When a proper factory standard charger repair from us would cost only about £130 is i sensible to create a half working bodge that costs more?

This is the new faster charging EBL 119 to replace the now unavailable EBL 99, although we can still supply rebuilt EBL 99's, but not new EBL 99's :

Schaudt DT 201B.pdf Schaudt DT 201B.pdf
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Schaudt  DT 220 B Operation.pdf Schaudt DT 220 B Operation.pdf
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Schaudt  DT 220 C Operating Instruct.pdf Schaudt DT 220 C Operating Instruct.pdf
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Schaudt Elektroblock EBL 119.pdf Schaudt Elektroblock EBL 119.pdf
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