When you plan to buy a house or a land then you would appoint a lawyer who could do the legal evaluation and would suggest if there are any litigations that are pending in the court of law. You would ensure that no law suits are logged by any of the heirs that could claim as the owner of the property. However, this sort of detailed analysis would become tough when you have to appoint the lawyer for signing the agreement with the suppliers for supplying the electricity. So, you could rely on strømtest than to invest your effort of money in making the agreement by self.
You could get the agreement that best fits your usage and then you could also get to know the complete details in the agreement. All that you do as part of signing several papers that you do with several vendors, when you take loan or insurance for your vehicles and many such documents is to blindly sign the agreement and then repent at a later point of time that you could not read through the complete details that are provided in the agreement. So, one suggestion that you should follow is to allocate ample time to read the agreement as there is a chance that the payment method that is preferred by the supplier of the electricity and the payment method that you may use in future may be completely different.
This difference in the payment mode could result in the change of electricity bill though you have signed the agreement that could bring your bill under control. So, make sure you read which payment method is supported in the agreement so that you could make the payment as is preferred by the supplier or choose a supplier who could support your payment method and still charge you less on the electricity.