BLUE SEA ADD A BATTERY Additional Battery Kit / 120A / 12 / 24 V

10 in stock
SVB price: €188.19
Excl. VAT, excl. shipping costs.
This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
€188.19 This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
Available variants:
Image of MINI ADD A BATTERY Additional Battery Kit / 65A / 12 / 24 V

BLUE SEA MINI ADD A BATTERY Additional Battery Kit / 65A / 12 / 24 V

Upgrade for your switching and charging systems. ADD A BATTERY allows the connection of a second battery, simplifies switching, and automates charging. Suitable for use with generators with 65 amps.

Item no.
Model no.
Additional battery kit - ADD A BATTERY (120 A)
Operating voltage
12 V, 24 V
Switch position
Switch function
Dual switch
Connector pins

Product details

ADD A BATTERY works just as easily as an ON-OFF switch and allows two batteries to be charged from a single power source. ADD A BATTERY is easy to use and install and can be used with generators with a maximum output of 120 amps. ADD A BATTERY consists of a battery switch and an automatic charging relay. These components simplify charging and switching between batteries, so that you can turn the battery switch ON when you arrive and turn it OFF when you leave the boat.

Battery switch
  • Simplifies switching
  • Isolates starter and consumer battery
  • Combines both batteries in emergencies to start the engine

Automatic charging relay
  • Connects both batteries automatically when charging
  • Isolates the batteries when the engine is started and when the batteries are not being charged
  • Divides the charging current more effectively than a conventional battery switch

The charging relay is designed for use in wiring systems with lead-acid battery types (also AGM and gel).

It monitors voltage levels matched to lead-acid battery types and automatically switches on or off at specific levels.
We strongly advise against using this relay in conjunction with LiFe(Y)PO4 batteries, as the higher nominal voltage or working voltage range of lithium batteries is not compatible with the levels for lead-acid types.

What other SVB customers have to say

100% real reviews

6 customer reviews

4.5 (out of 6 ratings)
3 Stars
2 Stars
1 Stars
David P.
by David P. Flag of France 6/13/2021 Verified purchase
La référence !
Very good product both for its quality and its functions. A bit expensive in Europe or only 4 on the value for money. I highly recommend.
Michael S.
by Michael S. Flag of Germany 4/23/2017 Verified purchase
It is certainly not the cheapest product on the market. However, after I have installed it carefully in the boat, I think that it is certainly the best complete offer (if only with English instructions - no problem for me). It should be noted that all connection bolts (relays and main switch) are M10 bolts. The handling of SVB (order, shipping ....) was in the usual exemplary manner.
Chrisotphe P.
by Chrisotphe P. Flag of France 11/3/2016 Verified purchase
Very good quality of manufacture. This relay is exactly what I was looking for to manage my two batteries.
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Comparison with other products

This product
Item no.
Customer ratings
Additional battery kit - ADD A BATTERY (120 A)
Additional battery kit - MINI ADD A BATTERY (65 A)
Connector pins
Availability / Price
10 in stock
only €188 19
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