UPDATE: Chris, the sales manager called and was very sympathetic and helpful in coming up with an acceptable solution to our issues. Once we receive the new batteries and if they work reliably, I will write a new much more positive review.
3 1/2 years ago, we purchased 2 Kilovault 1800hlx batteries from Alt-e for our 24 volt PV system in our rv. We had them installed by a certified solar technician. We very seldom used the system that year because we were parked mostly in places that had full hookups. After about 15 months, we moved to our off grid property and put our system into full time use. Within one month of using the system full time, we began having random shutdowns. We spent the next 2 months working with Alt-e's Tech support and paying close to $600 having solar technicians come out to do testing on everything that Alt-e wanted tested. Meanwhile we were having numerous shutdowns every day and night. My husband sleeps with a c-pap so his sleep was broken every single night when we lost power. Finally, Alt-e agreed to send ONE new battery AFTER we returned (at our expense $110) the battery that was defective. We were displaced from our home during the 3+ weeks it took to receive the new battery. We spent the next year or so with no problems with the system. The the weekend after Thanksgiving 2022, we started having shutdowns again. We again paid 2 different technicians for 2 different trips each to diagnose the problem. After checking every component of our system as well as all other components in the rv, the concensus was the batteries were bad. We again spent a month sending screen shots and testing whatever Alt-e wanted tested. We moved out of our home again on December 20th to wait for the new batteries to be shipped. We received them and got them installed on January 3rd. Within about 6 hours we began having shutdowns again. About 5 days later, we lost power and it didn't come back on. Ironically, Alt-e had sent one battery that didn't have a reset button. We called to question that and they said it wasn't a problem. The batteries are the same just one has a different case. Hmmm...anyway we once again, for the 3rd time since owning these Alt-e batteries, moved out of our home. (no power to keep the fridge running or the heat on so we had to completely winterize) After now dealing with 3 sets of these batteries in 3 years AND noticing that the Kilovault 1800hlx batteries have been discontinued, we requested they send one 24volt SimpliPhi battery to replace them. We even had our technician call the tech support person and explain all the tests he did and how he concluded the batteries are bad. The tech support guy wanted him to go back out to our property and call him and do the SAME TESTS AGAIN with the tech on the phone! We are staying with family 1 1/2 hours away. So they want us to not only have to pay the solar tech ANOTHER service call but we will have to drive there AGAIN but not be able to live in our home! Alt-e refused. They said we could buy one if we want a different battery. They did offer to send us a much cheaper lead acid battery if we want a different type. And of course they said the WONT WARRANTY THEM!! We are still displaced from our home. Its been 6 weeks and we are no closer to a resolution than we were when we left.
My recommendation is DO NOT BUY ANYTHING FROM THIS COMPANY!! You will not have a system you can count on and you will spend a lot of money and time trying to get them to stand behind their products.