• Brand: Whisper Power
  • Availability: In Stock
  • SKU: 40290312


Supply voltage range 14..70 VDC
Supply current1) : @Vin=24VDC 5 mA (@Vin=48 VDC)
@Vin=12VDC 6 mA (@Vin=36 VDC)
Input voltage range (auxiliary battery) 2..35 VDC
Input voltage range (main battery) 0..70 VDC
Input current range2) -9999..+ 9999 A
Battery capacity range 20..9990 Ah
Operating temperature range -20..+50 °C
Material of housing ABS
Color RAL 7021 black/ grey
Protection class IP20 (frontpanel only IP65)
Voltage ± 0.01 V (0..70 V)
Current ± 0.1 A (0..200 A)
Current ± 1 A (200..9999 A)
capacity range ± 0.1 Ah (0..200 Ah)
capacity range ± 1 Ah (200..9990 Ah)
state-of-charge (0..100%) ± 0.1%
time remaining (0..24hrs) ± 1 mn
time remaining (24..240hrs) ± 1 hr
temperature (-20..+50°C) ± 0.5 °C
Voltage measurement accuracy ± 0.3%
Current measurement accuracy ± 0.4%
frontpanel / body diameter ø 64 mm / ø 52 mm
total depth / weight 79 mm / 95 gr
footprint 45 x 87 mm
height 17 mm (base) / 35 mm
weight 145 gr
40290300 WBM 6mtr Connection accessory kit
40290301 WBM 12mtr Connection accessory kit
40290303 WBM 3mtr Quick Connection kit
40290304 WBM 10mtr Temperature sensor kit
40290305 WBM-RS-232 Communication kit
40290306 WBM-USB Communication kit
40290307 WBM1:5 Voltage prescaler kit
40290308 WBM Alarm output expander kit
40290320 WBM1200A/50mV shunt
40290321 WBM500A/50mV shunt (included WBM)

We can ship to virtually any address in the world. There are restrictions on some products and some products cannot be shipped to international destinations.
Promotional Shipping (e.g., free shipping) is only applied to orders shipped within the contiguous United States and does not apply to Alaska, Hawaii, Puerto Rico or the US Virgin Islands.
All shipments to Alaska or Hawaii and any other territories under the control of the United States may incur additional shipping charges based upon the weight of the package. Due to the distance, shipments will take a minimum of 5 business days to arrive.
Expedited shipping costs displayed on our website are only an estimate. You will be notified if the actual shipping cost exceeds the estimated shipping cost. We will never charge an increased shipping fee without your consent!

You may return most new, unopened items within 30 days of the delivery for a refund, returns made within 30 days of purchase will be refunded to the original form of payment. Returns initiated beyond 30 days of delivery will only be granted MABRU POWER SYSTEMS (MABRU STORE) credit. A 30% RESTOCKING FEE WILL BE APPLIED TO ALL RETURNS. We reserve the right to refuse returns or assess additional fees at our discretion, if the merchandise is not in the original packaging and ready-to-be-sold condition.
If you need to return an item, please Contact Us with your order number and details about the item. We will respond with instructions on how to return the item(s). Please ensure the item(s) are returned in its original packaging and properly secured for return shipment. Insurance MUST be applied to your return and tracking information of your return must be supplied to MABRU POWER SYSTEMS (MABRU STORE) via email at


We thoroughly inspect each item(s) prior to shipment to ensure and guarantee that the item(s) is free of any cosmetic damages and/or missing parts. While we take extra measures to ensure safe and secure shipment of your product, issues during shipment – while rare – are possible.
Upon receiving shipments from MABRU POWER SYSTEMS (MABRU STORE) and our partner shipping carriers, it is critical that you IMMEDIATELY inspect the package for damage PRIOR to signing for it and before accepting delivery from the carrier. If any damage is present, it MUST be noted on the carriers slip and reported to MABRU POWER SYSTEMS (MABRU STORE) IMMEDIATELY. If damage is discovered after accepting a shipment, it MUST be reported to MABRU POWER SYSTEMS (MABRU STORE) within 72 hours of the delivery. In the event that damage is reported beyond 72 hours of delivery, MABRU POWER SYSTEMS (MABRU STORE) will not accept any responsibility in replacing and/or further servicing your order.
It is imperative that you document the damage(s), this means photos of the exterior of the box MUST be supplied along with photos of the visible damage(s). It is crucial that ALL packaging- the bubble wrap, the box and pallet be saved, as required by the insurance company to file and successfully submit a claim of damage.
We will replace defective products with an exchange for the same model and style ONLY.
If your parcel is left without a signature and damage is found, please contact us within 48 hours at (954) 467-1770 or via email at


Your package should be unopened, unused and remain in the condition in which it was delivered until you successfully report a claim with MABRU POWER SYSTEMS (MABRU STORE).
Return on Electronics – Serial Number Policy
On returns of all electronics, serial numbers must match with serial number of product originally shipped and will undergo inspection; if serial numbers are not matching, a refund will not be issued.